THE r r, L 1 ^ d, AIVIMAL KINGDOM ARRANGED IN CONFORMITY WITH ITS ORGANIZATION, BY THE BARON CUVIER, PERPETUAL SECRETARY TO THE ROVAL ACADEMY OF SCIEIVCES, ETC. ETC. ETC. THE CRUSTACEA, ARACHNIDES AND INSECTA, BY P. A. LATREILLE, MEMBER OF THE ROYAL ACADEMY OF SCIENCES, ETC. ETC. ETC. TRANSLATED FROM THE FRENCH, WITH NOTES AND ADDITIONS, BY H. M'MURTRIE, M.D. &c. &c. / <^szTt IN FOUR VOLUMES, WITH PLATES.;*'- VOLUME I. NEW YORK : G. & C. & H. CARVILL ' MDCCCXXXI. :n Entered accoidino; to the act of congres.e, in the year one thousand eight luindrcd and thirty-one, by G. & C. & H. Carvill, in tiie clerii's office of the southern district of New York. Philadelphia : Printed by James Kay, .Tun. & Co. Piinlers to the American Piiilosopliical Society, No. 4, Minor Street. REMARKS. In presenting to the Zoologist this production of the Aris- totle of the nineteenth century, the oracle of his science, it is far from my intention to occupy his time by attempting to show that it is not only the best source of knowledge to which he can refer, that of Nature herself alone excepted, but that it is the only one from which he can be certain of obtaining it unmingled with the grossest error ^for this is universally admitted. Divesting himself of the prejudices arising from a blind re- verence for authority and a habit of imitation, our author has brought all the free energies of his powerful and penetrating mind to the investigation of his subject. Perceiving at once the importance of the difference between the constant and mutable characters of animals, aware of the harmony subsist- ing between one constant character and another, and unap- palled by the prospect of the almost endless labour that awaited him, he resolved to expose them with the knife; ex- pecting by the aid of comparative anatomy to arrive at facts which would enable him to arrange the whole animal king- dom, from Man to the last of the Infusoria, in its natural order. How well he has succeeded, the precision with which he has characterized insulated and mutilated fragments of fossil bones of extinct species, and the reconstruction of the whole of their gigantic frames from a part, this book, and the common consent of the learned of all countries, amply testify. He has accomplished the boast of Horace, he has erected the altars of the science in the temple of Truth, and placed its IV REMARKS. everlasting foundations on the unchangeable organization of that economy it was his business to study: his monument is imperishable '^^ Regalique situ pyrmnidum altius.^^ When the extent and nature of this work are taken into consideration, it will be readily surmised that my task has been far from an easy one ; and a glance at the original is sufficient to convince the scientific critic that such is not only the case, but that the difficulties I have had to encounter were of no ordinary cast. The graceful flexibility of the French lan- guage is such as to yield to a combination of words and forms of expression that almost bid defiance to any thing like sy_- nonymes in our more stubborn English. If this be true in relation to the language of conversation or that of books on or- dinary subjects, how greatly must the difficulty be increased when we find them abounding in a work like this ! Such has been my trouble and perplexity on this account, that I may be excused for observing, that although the necessity for making new words cannot be denied, we should never forget that there are but two sources from which they can be legitimately drawn the Latin or Greek. A word thus formed, being universally understood, may be removed unaltered from one language to another(l). Previously to commencing the execution of this version, it became indispensably requisite to fix upon some general plan of proceeding. The absurdity of translating into English the technical portion, or the nomenclature, was too apparent to demand a moment's consideration the genius of our language forbids it. To have left these terms in French would have been inexpedient for self-evident reasons ; and the idea of giving a class in Latin, an order in French, &c., presented too revolting a medley. By giving them all in Latin, the common language of science, these objections vanished, al- though it entailed difficulties of a different character. I have ventured to encounter them ; and while strictly adhering to (1) For some remarks on Uiis subject, see Count Dejean's preface to his Spe- cies, &c., I, p. 8. REMARKS. the Spirit;, and, as far as practicable, to the very letter of my author, have endeavoured to give to the whole work that classical 'Mbrm and })ressure" which facilitates its study and tends to fix its great and leading points more firmly in the memory. How far I have succeeded others must determine. I have not forgotten that akhougli this work is more parti- cularly intended to be studied by the naturalist, it will proba- bly be 7'ead by every one who has the slightest desire to ac- quire some knowledge of the numerous and interesting groups of animals by which Man is surrounded, and with which he is so indissolubly connected. The general reader will lose nothing by the concise and simple style I have endeavoured to adopt; and although the meanings of the names affixed to the various divisions are not placed in glaring characters at their head, he will always find it in the text. Whenever an animal is mentioned that is generally known by one and the same English, or vulgar name, I have always given it ; but of the many thousands here treated of, very few are thus circumstanced, and I cannot but think that it would be advantageous to the science if vulgar names were totally excluded from its nomenclature. The evidence of this is to be found in the fact, that, with comparatively few exceptions, these names vary, not only in different countries, but in dif- ferent parts of the same country. Thus the Rockfish of Phila- delphia is a Striped-Bass at Boston ; the Sheephead of Pitts- burg (a Corvina) is a totally different fish from the one so called in our city (a Sargiis), and even belongs to a different family; the Trout we receive from Long Branch might with equal propriety be denominated a Shark or a Sturgeon. Different names are sometimes attached to the same animal, and the same name to different animals. Vulgar names are a fruitful source of error ; and therefore I have employed them as spa- ringly and as cautiously as possible. An immaculate book is perhaps rather to be wished for than expected, and that errors should have crept into the Regne Animal is not at all surprizing. These I have endeavoured to correct, not by erasure or altering the text (those cases al- VI REMARKS. ways excepted where the mistake was evidently and purely typographical), hut by a note, either on the page itself, or in the appendix. Thus, whatever has been added, nothing has been taken away, and the text of my author remains as I found it. It was originally my intention to have made considerable additions of American species to the Entomology, but to such an extent has the formation of new genera and the division of old ones lately been carried, that it would have required more time to do this correctly than to translate the whole book, and consequently I was compelled to abandon it. Of the Fishes of this country nothing can be said, until we are in possession of the expected work of M. Lesueur. The period in which America was compelled to look to Europe for a knowledge of her own productions has termi- nated; and our Wilson, Say, Ord, Le Conte, Harlan, Hentz, Audubon, &c. &c. are repaying the debt with usury. Nor is this spirit of observation abating. The increasing number of institutions exclusively devoted to the natural sciences, in almost every section of our extensive country, shows the re- verse to be the fact, and authorizes us to expect the most splendid results from their united efforts. I cannot conclude without acknowledging my obligations to Major Le Conte for his valuable communications on various portions of the Regne Animal. The results of his critical and laborious investigations are chiefly to be found in the notes on American birds, and the Catalogue which closes this volume, and I have only to regret that the unfinished state of the work on the Lepidoptera of North America, which is now being published at Paris by him and M. Boisduval, prevented me from employing it. H. M^MURTRIE. Philadelphia y June 1831. rv v: PREFACE TO THE FIRST EDITION. Having devoted myself from my earliest youth to the stu- dy of comparative anatomy, that is to the laws of the or- ganization of animals and of the modijfications this organiza- tion undergoes in the various species, and havings for nearly thirty years since, consecrated to that science every moment of which my duties allowed me to dispose, the constant aim of my labours has been to reduce it to general rules, and to pro- positions which may contain their most simple expression. My first essays soon made me perceive, that I could only attain this in proportion as the animals, whose structure I should have to elucidate, were arranged in conformity with that structure, so that in one single name of class, order, genus, &c. might be embraced all those species which, in their ex- ternal as well as internal conformation, have affinities either more general or particular. Now this is what the greater number of naturalists of that epoch had never attempted, and what but few of them could have effected, had they even been willing to try, since a similar arrangement presupposes an extensive knowledge of the structures, of which it is partly the representation. It is true, that Daubenton and Camper had given facts, that Pallas had indicated views : but the ideas of these learned men had not yet exercised upon their contemporaries the in- fluence they merited. The only general catalogue of animals then in existence, and the only one we possess even now^, the system of Linnseus, had just been disfigured by an unfortunate editor, who did not even take the pains to examine the prin- Vlll PREFACE TO THE FIRST EDITION, ciples of that ingenious methodist, and who, wherever he found any disorder, seems to have tried to render it more in- extricable. It is also true, that there were very extensive works upon particular classes, which had made known a great number of new species ; but their authors merely considered the exter- nal relations of those species, and no one had employed him- self in arranging the classes and orders from the ensemble of the structure ; the characters of several classes remained false or incomplete even in justly celebrated works of anatomy; ^ome of the orders were arbitrary, and in scarcely any of these divisions were the genera placed conformably to nature. I was compelled then, and the task occupied a considerable period of time, I was compelled to make anatomy and zoology, dissection and classification, the pioneers of my steps ; to search for better principles of distribution in my first remarks on or- ganization to employ them in order to arrive at new ones, and to render the distribution perfect in fine, from this mu- tual reaction of the two sciences, to elicit a system of zoology that might serve as an introduction and a guide in anatomical investigations, and as a body of anatomical doctrine fitted to develope and explain the zoological system. The first results of this double labour appeared in 1795 in a special memoir upon a new division of the white blooded animals. A sketch of their application to genera and to their division in subgenera was the object of my elementary " Ta- bleau Elementaire des Animaux," printed in 1798, which, in conjunction with M. Dumeril, I improved, in the tables an- nexed to the first volumes of my " Legons d' Anatomic Com- paree" in 1800. I should, perhaps, have contented myself with perfecting these tables, and proceeded immediately to the publication of my great work on anatomy, if, in the course of my researches, I had not been frequently struck with another defect of the greater number of the general or partial systems of zoology; I mean the confusion in which the v\^ant of critical acumen has left a great number of species, and even several genera. PREFACE TO THE FIRST EDITION. IX The classes and orders were not only not sufficiently con- formed to the intimate nature of animals to serve conve- niently as a basis to a treatise on comparative anatomy, but the genera themselves, although mostly better constituted, presented but inadequate resources, on account of the species not having been arranged under each of them, in conformity with these characters. Thus in placing the Sea-cow (Mana- tus, Cuv.) in the genus Morse (Trichechus, Lin.), the Siren in that of the Eels, Gmeliu had rendered any general propo- sition relative to the organization of these two genera imposs- ible, just as by approximating to the same class the same order, and placing side by side the Sepia and the fresh- water Polypus, he had made it impossible to say any thing in general on the class and order wiiich embraced such different beings. The examples above cited are selected from the most strik- ing of these errors ; but there existed an infinitude of them, less sensible at the first glance, which presented difficulties not less real. It was not enough then to have imagined a new ar'^ange- ment of classes and orders, and to have properly placed the genera there ; it was also necessary to examine all the species in order to be assured, whether they really belonged to the genera in which they had been placed. Having come to this, I found species not only grouped or dispersed, against all semblance of reason, but I remarked that several had not been positively determined ; neither by the characters assigned to them, nor by their figures and de- scriptions. Here, one of them, by means of synonymes, represents seve- ral in one single name, and often so different from each other that they should not be placed in the same genus ; there, a single one is doubled, trebled, and successively reappears in several subgenera, genera, and sometimes in different orders. What shall we say, for instance, of the Trichechus mana- tus of Gmelin, which in one single specific name comprises three species and two genera ; two genera, differing in almost Vol. I. (2) X PREFACE TO THE FIRST EDITION. every thing? By what name shall we speak of the Velella^ which figures there twice among the Medusfe and once among the Holothuriae ? How are we to bring together the Biphorse ; some of which are called there Dagysse, the greater number SalpED, and several placed among the Holothuriae. In order, therefore, completely to attain the object, it was not sufficient to review the species it w^as necessary to re- view their synonymes, or in other words to remodel the sys- tem of animals. Such an enterprise, from the prodigious development of the science in late years, could not have been executed com- pletely by any one individual, even supposing him to have no other employment and to live the longest possible term of years ; had I been constrained to depend upon myself alone, I should not have been able to prepare even the simple sketch I now give ; but the resources of my position seemed to me to supply what I wanted both of time and talent. Living in the midst of so many able naturalists drawing from their works as fast as they appeared enjoying the use of their collec- tions as freely as themselves and having formed a very con- siderable one myself especially appropriated to my object ; a great portion of my labour consisted merely in the employ- ment of so many rich materials. It v^^as not possible, for in- stance, that much remained for me to do on shells studied by M. de Lamarck, or on quadrupeds described by M. Geoffroy. The numerous and new affinities observed by M. de Lace- pede were so many traits for my system of fishes. Among so many beautiful birds, collected from all parts of the world, M. Le Vaillant perceived details of organization, which I im- mediately adapted to my plan. My own researches, employed and multiplied by other naturalists, yielded those fruits to me, which, in my hands alone, they would not, all, have produced. Thus, by examining, in the cabinet I have formed, the ana- tomical preparations on which I designed to found my division of reptiles, M. de Blainville and M. Oppel anticipated (and perhaps better than I could have done) results of which as yet I had but a glimpse, &c., &c. PREFACE TO THE FIRST EDITION. XI Encouraged by these reflections, I determined to precede my treatise on comparative anatomy by a kind of abridged system of animals, in vvhicii I would present their divisions and subdivisions of all degrees, established in a parallel man- ner upon tlieir stracture, external and internal ; where I would give the indication of well ascertained species, which certainly belong to each of the subdivisions, and where, to create more interest, I would enter into some details upon such of those species, which from their abounding in our country, the uses to which we put thenij the evils they cause us, the singularity of their habits and economy, their extraordinary forms, their beauty or their size, become the most remarkable. In so doing, I hoped to prove useful to young naturalists, vyho, for the most part, have but little idea of the confusion and errors of criticism in which the most accredited works abound, and who, in foreign countries particularly, do not sufficiently attend to the study of the true relations of the con- formation of beings ; I considered myself as rendering a more direct service to those anatomists, who require to know be- forehand to what orders they should direct their researches, when they wish to solve any problem of human anatomy or physiology by comparative anatomy, but whose ordinary oc- cupations do not sufficiently prepare them for fulfilling this condition which is essential to their success. I had no intention, however, of extending this two-fold view to all the classes of the animal kingdom, and the Vertebra ted animals, as in every sense the most interesting, naturally claimed a preference. Among the Invertebrata, I had to study more particularly the naked Mollusca and the great Zoophytes ; but the innumerable variations of the external forms of shells and corals, the microscopic animals, and the other families whose part, on the great theatre of nature, is not very apparent, or whose organization affords but little room for the use of the scalpel, did not require a similar mi- nuteness of detail. Independently of this, so far as the shells and corals were concerned, I could depend on the work of Xll PREFACE TO THE FIRST EDITION. M. de Lamarck, in which will be found all that the most ar- dent thirst for knowledge can desire. As regards Insects, which, by their exterjial form, organi- zation, habits, and influence on all animated nature, are so highly interesting, I have been fortunate enough to find assis- tance, which, in rendering my work infinitely more perfect than it could have possibly been had it emanated from my pen alone, has at the same time considerably accelerated its publica- tion. My friend and colleague M. Latreille, who has studied these animals more profoundly than any other man in Europe, has kindly consented to give, in a single volume, and nearly. in the order adopted for the other parts, a summary of his immense researches, and an abridged description of those in- numerable genera entomologists are continually establishing. As for the rest, if in some places I have given less extent to the exposition of subgenera and species, all that relates to the superior divisions and the indicia of relations, I have founded on bases equally solid, by assiduous and universal re- searches. I have examined, one by one, all the species of which I could procure specimens ; I have approximated those which merely differed from each other in size, colour, or in the number of some parts of little importance, and have formed them into what I denominate subgenera. Every time it was possible, I dissected one species at least of each subgenus, and if those be excepted to which the scalpel cannot be applied, but very few groups of this degree can be found in my work, of which I cannot produce some considerable portion of the organs. Having determined the names of the species I observed, which had been previously either well described or well figured, I placed in the same subgenera those I had not seen, but whose exact figures, or descriptions, sufficiently precise to leave no doubt remaining as to their natural rela- tions, I found in authors; but I have passed over in silence that great number of vague indications, on which, in my opi- nion, naturalists have been too eager to establish species, PREFACE TO THE FIRST EDITION. XUl whose adoption is vvliat hcas mainly contributed to introduce in the catalogue of beings, that confusion which deprives it of so great a portion of its utility. I could, every where, have added great numbers of new species, but as I could not refer to figures it would in that case have been necessary to extend their descriptions beyond the bounds of my limits ; I have preferred therefore depriv- ing my work of that ornament, and have indicated those only whose singular formation gives origin to new subgenera. My subgenera once established on undoubted relations, and composed of well ascertained species, nothing remained but to construct this great scaffolding of genera, tribes, families, orders, classes and divisions which constitute the ensemble of the animal kingdom. Here I have proceeded, partly by ascending from the in- ferior to the superior divisions, by means of approximation and comparison, and partly by descending from the superior to the inferior divisions, on the principle of the subordination of characters; carefully comparing the results of the two methods, verifying one by the other, and always sedulously establishing the correspondence of forms, external and inter- nal, both of which constitute integral parts of the essence of each animal. Such has been my mode of proceeding whenever it was ne- cessary and possible to form new arrangements ; but I need not observe, that in many places, the results to which it would have conducted me, had been already so satisfactorily obtained, that no other trouble was left to me than that of following the track of my predecessors. Even in these cases, however, by new observations I have confirmed and verified what was previously acknowledged, and what I did not adopt until it was subjected to a rigorous scrutiny. An idea of this mode of examination maybe obtained from the Memoirs on the ana- tomy of the Mollusca which have appeared in the " Annales du Museumf" and of which I am now preparing a separate and augmented collection. I venture to assure the reader, that the labour I have bestowed upon the Vertebrated animals. XIV PREFACE TO THE FIRST EDITION. the Annukta, the Radiata, and many of the Insects and Crus- tacea, is equally extensive. I have not deemed it necess- ary to publish it with the same detail ; but all my prepara- tions are exposed in the Cabinet of Comparative Anatomy in the Jardin du Roi, and will serve hereafter for my Treatise on Anatomy. Another work of considerable labour, but wliose proofs cannot be made so authentic^ is the critical examination of species. I examined and verified all the figures adduced by authors, and as often as possible referred each to its true spe- cies, before making a choice of those I have pointed out ; it is from this verification alone, and never from the classification of preceding methodists, that I have referred to my sub- genera the species that belong to them. Such is the reason, why no astonishment should be experienced on finding that such or such a genus of Gmelin is now divided and distributed even in different classes and divisions; that numerous nominal species are reduced to a single one, and that vulgar names are very differently applied. There is not a single one of these changes that I am not prepared to justify, or of which the reader himself may not obtain the proof by recurring to the sources I have indicated. In order to diminish his trouble, I have been careful to se- lect for each class a principal author, generally the richest iu good original figures, and I quote secondary works only in those cases in which the former are silent, or where it was useful to establish some comparison, for the sake of confirm- ing synonymes. My subject could have been made to fill many volumes, but I considered it my duty to condense it, by imagining abridged means of publication. I have obtained these by gra- duated generalities ; by never repeating for a species what could be said of a whole subgenus, nor lor a genus what might be applied to an entire order, and so on, we arrive at the greatest possible economy of words. To this my endeavours have been, above all, particularly directed, inasinuch as this was the principal end of my work. It may be observed, PREFACE TO THE FIRST EDITION. XV however, that I have not employed many technical terms, and that I have endeavoured to communicate my ideas with- out that barbarous apparatus of factitious words, which, in the works of so many modern naturalists, prove so very re- pulsive. I cannot perceive, however, that I have thereby lost any thing in precision or clearness. I have been compelled, unfortunately, to introduce many new names, although I endeavoured as far as possible to pre- serve those of my predecessors ; but the numerous subgenera I have estabJislied required these denominations ; for in things so various the memory is not satisfied with numerical indica- tions. I have selected them, so as either to convey some character, or among thecommon names which I have latinized, or finally after the example of Linnseus, from those of mytho- logy, which are generally agreeable to the ear, and which we are far from having exhausted. In naming species, however, I would recommend employ- ing the substantive of the genus, and the trivial name only. The names of the subgenera are designed as a mere relief to the memory, when we wish to indicate these subdivisions in particular. Otherwise, as the subgenera, already very nu- merous, will in the end become greatly multiplied, in con- sequence of having substantives continually to retain, we shall be in danger of losing the advantages of that binary nomen- clature so happily imagined by Linnceus. It is the better to preserve it that I have dismembered, as little as possible, the genera of that illustrious reformer of science. Whenever the subgenera in which I divide them were not to be translated to different fiimilies, I have left them together under their former generic appellation. This was not only due to the memory of Linnseus, but it was ne- cessary in order to preserve the mutual intelligence of the naturalists of different countries. The habit, naturally acquired in the study of natural his- tory, of thcy-mental classification of a great number of ideas, is one of the advantages of that science that is seldom observed, and which, when it shall have been generally introduced into XVJ PREFACE TO THE FIRST EDITION. the system of common education^ will become, perhaps, the principal one. By it, the student is exercised in that part of logic which is termed method, just as he is by geometry in that of syllogism, because natural history is the science which requires the most precise methods, as geometry is that which demands the most rigorous reasoning. Now this art of me- thod, once well acquired, may be applied with infinite advan- tage to studies the most foreign to natural history. Every dis- cussion which supposes a classification of facts, every research which demands a distribution of matters, is performed accord- ing to the same laws; and he who had cultivated this science merely for amusement, is surprised at the facilities it affords him in disentangling and arranging all kinds of affairs. It is not less useful in solitude. Sufiiciently extensive to satisfy the most powerful mind, sufiiciently various and inte- resting to calm the most agitated soul, it sheds consolation in the bosom of the unhappy, and stills the angry waves of envy and hatred. Once elevated to the contemplation of that har- mony of nature irresistibly regulated by Providence, how weak and trivial appear those causes which it has been pleased to leave dependent on the will of man ! How astonishing to be- hold so many fine minds, consuming themselves so uselessly for their own happiness or that of others, in the pursuit of vain combinations, whose very traces a few years suffice to sweep away. I avow it these ideas have always been present to my mind, the companions of my labours ; and if I have endeavoured by every means in my power to advance this peaceful study, it is because, in my opinion, it is more capable than any other of supplying that want of occupation, which has so largely con- tributed to the troubles of our age but I must return to my subject. There yet remains the task of accounting for the principal changes I have effected in the latest received methods, and to acknowledge the amount of my obligations to those natu- ralists, whose works have furnished or suggested a part of them. PREFACE TO THE FIRST EDITION. XVII To anticipate a remark which will naturally present itself to many, I must observe that I have neither desired nor pre- tended to class animals so as to form one single line, or so as to mark their relative superiority. I even consider every at- tempt of this kind impracticable. Thus, I do not mean that the Mammalia or Birds which come last, are the most imper- fect of their class ; still less do I believe that the last of the Mammalia are more perfect than the first of the Birds, the last of the Mollusca more so than the first of the Annulata or of the Radiata, even restraining the meaning of this vague word perfect to that of most completely organized. I re- gard my divisions and subdivisions as the merely graduated expression of the resemblance of the beings which enter into each of them, and although in some we observe a sort of de- gra'dation or passage from one species to the other, which can- not be denied, this disposition is far from being general. The pretended chain of beings, as applied to the whole creation, is but an erroneous application of those partial observations, which are only true when confined to the limits within which they were made it has, in my opinion, proved more detri- mental to the progress of natural history in modern times, than it is easy to imagine. It is in conformity with these views that I have established my four general divisions, which have already been made known in a separate Memoir. I still think it expresses the real relations of animals more exactly than the old arrange- ment of Vertebrata and Invertebrata, for the simple reason, that the former animals have a much greater resemblance to each other than to the latter, and that it was necessary to mark this difference in the extent of their relations. M. Virey, in an article of the " Nouveau Dictionnaire d'His- toire Naturelle,'' had already discovered a part of the basis of this division, and principally that which reposes on the ner- vous system. The particular approximation of oviparous Vertebrata, in- ter se, originated from the curious observations of M. Geoff"- roy on the composition of bony heads ; and from those I have Vol. I.~(3) XVlll PREFACE TO THE FIRST EDITION. added to them, relative to the rest of tlie skeleton and to the muscles. In the Mammalia I have brought back the Solipedes to the Pachydermata, and have divided the latter into families on a new plan ; the Rurainantia I have placed after the Quadru- peds, and the Sea-cow near the Cetacea. The arrangement of the Carnaria I have somewhat altered the Ouistites have been wholly separated from the Monkeys, and a sort of pa- rallelism between the pouched animals and other digitated Mammalia indicated ; the whole from my own anatomical re- searches. All that I have given on the Quadrumana and the Bats is based on the recent and profound labours of my friend M. GeofTroy de Saint-Hilaire. The researches of my bro- ther, M. Frederick Cuvier, on the teeth of the Carnaria and the Rodentia, have proved highly useful to me in forming the subgenera of these two orders. Notwithstanding the genera of the late M. Illiger are but the results of these same studies, and those of some foreign naturalists, I have adopted his names whenever my subgenera could be placed in his genera. I have also adopted M. de Lacepede's excellent divisions of this description, but the characters of all the degrees and all the indications of species have been taken from nature, either in the cabinet of anatomy, or the galleries of the Museum. The same plan was pursued with respect to the Birds. I have examined with the greatest care and attention more than four thousand individuals in the Museum ; I arranged them agreeably to my views in the public gallery more than five years ago, and all that is said of this class has been drawn from that source. Thus, any resemblance which my subdivisions may bear to some recent descriptions is on my side purely accidental(l). (1) This observation not having been sufficiently understood abroad, I am com- pelled to repeat it here, and openly to declare a fact witnessed by thousands in Pai-is it is this, that all the birds in the pul)lic gallery of the Museum were named and arranged according to my system in 1811. Even such of my subdivisions as I had not yet named were marked by particular signs. This is my date. In- PREFACE TO THE FIRST EDITION. XIX Naturalists^ I hope, will approve ofthe numerous subgenera I have deemed it necessary to establish among the Birds of Prey, PasserinsB, and Shore-Bird^; they appear to me to have completely elucidated genera hitherto involved in much con- fusion. I have also marked, as exactly as I could;, the corres- pondence of these subdivisions with the genera of MM. de La- cepede, Meyer, Wolf, Temminck, Savigny, and have refer- red to each of them all the species of which I could obtain a very positive knowledge. This laborious work will prove of value to those who may hereafter attempt a true history of Birds. The splendid works on Ornithology published within a few years, and those chiefly of M. Le Vaillant, which ar'e filled with so many interesting observations, together with M. Vieillot's, have been of much assistance to me in designating with precision the species they represent. The general division of this class remains as I published it in 1798 in my "Tableau Elementaire(l).'' The general division of Reptiles, by my friend M. Brong- niart, I have thought proper to preserve, but I have prose- cuted very extensive and laborious anatomical investigations to obtain my ulterior subdivisions. M. Oppel, as I have al- ready stated, has partly taken advantage of these preparatory labours, and whenever my genera finally agreed wdth his, I have noticed the fact. The work of Daudin, indifferent as it is, has been useful to me for indications of details, but the par- ticular divisions I have made in the genera Monitor and Gecko, are the product of my own observations on a great number of Reptiles recently brought to the Museum by Messrs Peron and GeofFroy. My labours with regard to the Fishes Vv'ill probably be found to exceed those I have bestowed on the other vertebrated dependently of this, my first volume was printed in the beginning of 1816. Four volumes are not printed as quickly as a pamphlet of a few pages. I say no more. (Note to Ed. 1829.) (1)1 only mention this, because an amiable naturalist, M. Vieillot, in a recent work has attributed to liimself the union of the Picx with the Passeres. T liad published It in 1798, with my otlier arrangements, so as to render them public in the Museum since 1811 and 1812- XX PREFACE TO THE FIRST EDITION. animals. Since the publication of the celebrated work of M. de Laccpede, the accession to our Museum of a great number of fishes, has enabled me to add several subdivisions to those of that learned naturalist, to form different combinations of several species, and to multiply anatomical observations. I have also had better means of verifying the species of Commerson and of some other travellers, and on this point I owe much to a re- view of the drawings of Commerson and of the dried fishes he brought with him, by M. Dumeril, which have been but very lately recovered : resources to which I added those pre- sented to me in tlie fislies brought by Peron from the Indian Ocean and Archipelago; those which I collected in the Medi- terranean, and the collections made on the coast of Coroman- del by the late M. Sonnerat, at the Isle of France by M. Ma- thieu, in the Nile and Red Sea by M. Geoffroy, &c. I was thus enabled to verify most of the species of Bloch, Russel, and others, and to have prepared the skeletons and viscera of nearly all the subgenera, so that this portion of the work will, I presume, present to icthyologists much that is new. As to my division of this class, I confess its inconvenience, but I still think it more natural than any preceding one. When I first published it, I gave it, quantum valeat, and if any one discovers a better principle of division, and as conformable to ^he organization, I shall hasten to adopt it. It is well known that all the works, on the general division of the Invertebrated animals, are mere modifications of what I proposed in 1795 in the first of my memoirs; and the time and care I have devoted to the anatomy of the Mollusca in ge- neral, and principally to the naked Mollusca, are equally so. The determining of this class, as well as of its divisions and subdivisions, rests on my observations ; the magnificent work of M. Poli had alone anticipated me by descriptions and anatomical researches, useful to me it is true, but confined to bivalves and multivalves only. I have verified all the facts furnished to me by that able anatomist, and I have, I think, more justly marked the functions of some organs. I have also endeavoured to determine the animals to which the principal PREFACE TO THE FIRST EDITION. XXI forms of shells belong, and to arrange the latter from that con- sideration; but as to the ulterior divisions of those shells whose animals resemble each other, I have examined them only so far as to enable me to describe those admitted by Messrs de Lamarck and de Montfort; even the small number of genera or subgenera which are properly mine, are derived from observa- tions on the animals. In citing examples I have confined my- self to a certain number of the species of Martini, Chemnitz, Lister, and that only (the volume of M. de Lamarck, which is to contain these matters, not being published), because I was compelled to fix the attention of the reader on specific objects. In the selection and determining of these species however I lay no claim to the same critical accuracy I have employed for the Vertebrated animals and the naked Mol- lusca. The excellent observations of Messrs Savigny, Lesueur, and Desmarest on the compound Ascidia, approximate the latter family of the Mollusca to certain orders of Zoophytes a curious relation, and an additional proof of the impractica- bility of arranging animals on one single line. The Annul^ta (the establishing of which order, although not the name, belongs de facto to me) have I think been ex- tricated from the confusion in which they had hitherto been involved among the Mollusca, the Testacea, and the Zoophy- tes, and placed in their natural order even their genera have been elucidated only by my observations on them, published in the '^ Dictionnaire des Sciences Naturelles," and elsewhere. I can say nothing relative to the three classes contained in the third volume. M. Latreille, who, with the exception of some anatomical details, founded on my own observations and those of M. Randohr, added to his text, is its sole author, will spare me that trouble. As to the Zoophytes, which terminate the animal kingdom, I have availed myself, for the Echinodermata, of the late work of M. de Lamarck, and for the Intestinal Worms, of that of M. Rudolphi, entitled Entozoa; but I have anatomized ail the genera, some of which have been determined by me only. XXU PREFACE TO THE FIRST EDITION. Besides this, there is an excellent work of M. Tiedemann on the anatomy of the Echinodermata that received the prize of the Institute some years ago, that will shortly appear it will leave nothing unsaid with respect to these curious animals. The Corals and the Infusoria, allowing no field for anatomical investigations, have been briefly disposed of. The new work of M. de Lamarck will supply my deficiencies(l). With respect to authors, I can only mention, here, those who have furnished me with general views, or who were the origin of such in my own mind(2). There are many others to whom I am indebted for particular facts, whose names I have carefully quoted wherever I have made use of them. They will be found on every page of my book. Should I have omitted to do justice to any, it must be attributed to in- voluntary forgetfulness no property, in my eyes, is more sacred than the conceptions of the mind, and the custom, too common among naturalists, of making plagiarisms by a change of names, has always appeared to me a crime. The publication of my Comparative Anatomy will now occupy m every moment ; the materials are ready, great quantities of preparations and drawings are finished and ar- ranged ; and I shall be careful in dividing the work into parts, each of which will form a whole, so that should my physical powers prove insufficient for the completion of the totality of my plan, what I shall have produced will still form entire suites, and the materials I have collected be ready for the hand of him who may undertake the continuation of my la- bours. Jar din du Boi, 1816. (1) I have tills moment received, I'Histoire des Poli/piers coralligenes Jlexibles of M. Lamouroux, which furnishes an excellent supplement to M. Lamarck. (2) M. de nlainville has recently published general zoolog-ical tables, which I regret came too late for me to profit by; having appeared when my book was nearly printed. PREFACE TO THE SECOND EDITION, The preceding preface exhibits a faithful account of the state in wliich I found the history of animals at the time the first edition of this work was published. During the twelve years that have since elapsed, this science has made immense progress. The labours of numerous, courageous, and learned travellers, who have explored every region of the globe, the rich collections formed and rendered public by various go- vernments, the profound and splendid works where new species are described and figured, and whose authors have been determined to detect their mutual relations and to con- sider them in every light(l), have all been instrumental in producing this result. I have endeavoured to avail myself of these discoveries, as far as my plan permitted, by first studying the innumerable specimens received at the Cabinet du Roi, and comparing them with those which served as the basis of my first edition, in order to deduce thence new approximations or new subdi- visions, and then by searching in all the books I could pro- cure for the genera or subgenera established by naturalists, and the description of species by which they have supported these different combinations. The study of synonymes has become much easier now than it was at the period of my first edition. Both French and _ __________ (1) See my Discourse before the Institute on the " Progres de I'Histoire Natu- relle depuis la pais maritime," published in the third volume of my " Eloges." XXIV PREFACE TO THE SECOND EDITION. foreign naturalists seem to have felt the necessity of establish- ing divisions in those immense genera, in which such incon- gruous species were formerly heaped together ; their groups are now precise and well defined, their descriptions sufficiently detailed, their figures scrupulously exact even to the most minute characters, and very frequently of the greatest beauty. Scarcely any difiiculty remains therefore in determining the identity of their species, and nothing hinders them from com- ing to an understanding with respect to the nomenclature. . This, unfortunately, has been almost neglected ; the names of the same genera, the same species, are multiplied as often as they are spoken of ; and should this discord continue, the same chaos will be produced that previously existed, though arising from a different cause. I have used every effort to compare and approximate these redundancies, and forgetting even my own little interest of author, have often given names which seem to have been form- ed expressly to avoid being compelled to avow the borrowing of my divisions. But in order thoroughly to execute this un- dertaking, this pinax of the animal kingdom, which becomes daily more and more necessary, to examine its proofs, and to fix on the definite nomenclature that would be adopted, by basing it on suflicient figures and descriptions, requires more space than I can dispose of, and a time imperiously claimed by other works. It is in the " History of Fishes," which, assisted by M. Valenciennes, I have commenced publishing, that I intend to give an idea of what I think might be effected with respect to all parts of the science. This is a mere abridgement, a simple sketch fortunate will I be if I succeed in rendering it correct in all its parts. Various descriptions of a similar kind have been published on some of the classes, and I have carefully studied them all, in order to perfect my own. The ^'Mammalogie'^ of M. Desma- rest, that of M. Lesson, the "Traite sur les Dents des Qua- drupedes" of M. Frederick Cuvier, the English translation of my first edition by Mr Grifiith enriched by numerous additions chiefly by Hamilton Smith, the new edition of the '^ Ma- PREFACE TO THE SECOND EDITION. XXV niiel d'Ornithomalogie'' of M. Temminck, the '^Ornithological Fragments" of M. Wagler^the '^Description of Reptiles" by the late Merreni;, and the dissertation on the same subject by M. Fitzinger, were principally useful to me for theVertebrated animals. The '^'^Histoire des Animaux sans Vertebres" of M. de Lamarck; and the ^' Malacologie" of M. de Blainville, were also of great use to me for the Mollusca. To these I have added the new views and facts contained in the numerous and learned writings of Messrs GeofTroy Saint-Hilaire, father and son, Savigny, Temminck, Lichtenstein, Kuhl, Wilson, Hors- iield, Vigors, Swainson, Gray, Ord, Say, Harlan, Charles Bo- naparte, Lamouroux, Mitchell, Lesueur, and many other able and studious men, whose names will be carefully mentioned, wherever I speak of the subjects they have described. The fine collection of engravings which have appeared wathin the last twelve years, have allowed me to indicate a greater number of species, nor have I failed to make ample use of the opportunity. I must particularly acknowledge what I owe on this score, to the ^"^Histoire desMammiferes" of MM. Geoffroy Saint-Hilaire and Frederick Cuvier, the "Planches Coloriees" of Messrs Temminck and Laugier, the '^ Galerie des Oiseaux" of M. Vieillot, the new edition of the " Oiseaux d'Al- lemagne" of M. Nauman, the Birds of the United States of Messrs Wilson, Ord, and Charles Bonaparte(l), the great works of M. Spix and of the prince Maximilian de Wied on the animals of Brazil, and to those of M. Ferussac on the Mol- lusca. The plates and zoological descriptions of the travels of Messrs Freycinet and Duperrey, given in the first by Messrs Quoy and Gaymard, and in the second by Messrs Lesson and Garnot, present, also, many new objects. The same should be said of the animals of Java, by M. Horsfield. Though on a smaller scale, new figures of rare species are to be found in the " Memoiresdu Museum," in the '<^ Annalesdes Sciences Natu- relles," in the different dictionaries of the natural sciences, in \ (1) The work of M. Audubon upon the Birds of North America, which sur- passes all others in magnificence, was unknown to me till after the whole of that part which treats of birds was printed. Vol. I (4.) XXVI PREFACE TO THE SECOND EDITION. the Zoological Illustrations of M. Swainson, and in the Zoolo- gical Journal published by able naturalists in London. The Journals of the Lyceum of New York, and of the Academy of Natural Sciences of Philadelphia, are not less precious; but in proportion as the taste for natural history becomes extended, and the more numerous the countries in which it is cultivated, the number of its acquisitions increase in geometrical pro- gression, and it becomes more and more difficult to collect all the writings of naturalists, and to complete the table of their results 5 I rely therefore on the indulgence of those whose ob- servations may have escaped me, or whose works I may not have sufficiently studied. My celebrated friend and colleague M. Latreille, as in the first edition, having consented to take upon himself the im- portant and difficult subject of the Crustacea, Arachnides and Insects, will himself point out the path he has pursued ; so that on these points I need say nothing more here. Jar din du JRoi, October 1828. SYSTEMATIC INDEX. INTRODUCTION 1 Of natural history 1 Of living beings and or- ganization in general 7 Division of organized be- ings into animals and vegetables 1 1 Of the forms peculiar to the organic elements of the animal body, and of the principal com- binations of its chemi- cal elements 13 Of the forces which act in the animal body 16 Summary idea of the func- tions and organs of the bodies of animals, and of their various degrees of complication 19 Of the intellectual func- tions of animals 25 Of method as applied to the animal kingdom 29 Distribution of the ani- mal kingdom into four great divisions 30 OF THE VERTEBRATA IN GENERAL 33 Subdivision of the Verte- brata into four classes 36 MAMMALIA 38 Orders of the Mammalia 42 BIMANA 44 Man 44 Peculiqir conforma- tion of Man 45 Physical and moral development of Man 48 Varieties of the hu- man species 52 QUADRUMANA 55 Simla 56 Simla proper 57 Pithecus 57 Hilobates 59 Cercopithecus 60 Semnopithecus 62 Macacus 63 Inuus 64 Cynocephalus 64 Mandrills 66 Monkeys of America 66 Sapajous 66 Mycetes 66 Ateles 67 Lagothris 68 Sajous 69 Saimiri 69 Sakis 70 Callithrix 70 Nocthora 71 Ouistitis 71 . Midas 72 Lemur 72 Lemur proper 73 Indris 73 Loris 73 Galago 74 Tarsius 74 CARNARIA 75 CHEIROPTERA 76 Vespertilio 76 Pteropus 77 Cephalotes 78 Vespertilio proper 78 Molossus 79 Dinops 79 Nyctinomus 79 Noctilio 80 Phyllostoma 80 Megaderma 81 Rhinolophus 81 Nycteris 82 Rhinopoma 82 i-k t-\. f\ XXVIU SYSTEMATIC INDEX. Taphozous 82 Mormoops 83 Vesperti io 83 Plecotus 84 Nyctlceus 84 Galeopithecus 84 INSECTIVORA 85 Erinaceus 85 Centenes 86 Cladobates 87 So rex 87 Mygale 88 Chrysochloris 89 Talpa 90 Condylura 91 Scalops 91 CARNIVORA 92 Plantigrada 93 Ursus 93 Procyon 95 Allurus , 96 Ictides 96 Nasua 97 Meles 97 Gulo 98 Ratelus 99 DlGITIGRADA 99 Mustela 99 Putorius 99 Mustela proper 100 Mephitis 102 Lutra 103 Can is 104 Canis proper 105 Foxes 107 Megalotis 108 Viverra 108 Viverra proper 109 Genetta 109 Paradoxurus 110 Mangusta 111 Ryzjena 111 Crossarchus 112 Proteles 112 Hysena 112 Felis 113 AMPHIBIA 117 Phoca 118 Phoca proper 118 Stenorhynchus 119 Pelagus 120 Stemmatopus 120 Macrorhinus 120 Otaries 120 Trichechus 121 MARSUPIALIA 122 Didelphis 124 Didclphis proper 125 Chironectes Dasyurus Thylacinus Phascogale Dasyurus proper Peramcles Phalangista Phalangista proper Petaurus Hypsiprymnus Macropus Koala Phascolomys RODENTIA Sciurus Sciurus proper Pteromys Clieiromys Mus Arctomys Spermophilus Myoxus Ecliimys Hydromys Capromys Mus proper Gerbillus Meriones Cricetus Arvicola Fiber Arvicola Georychus Otomys Dipus Helamys Spalax Bathyergus Geomys Diplostoma Castor Myopotamus Hystrix Hystrix pi-oper Atlierurus Eretison Synetheres Lepus Lepus proper Lagomys Hydrochaerus Cavia Kerodon Chlorom}^s Coelogenys EDENTATA TAnnionADA Bradypus 126 127 126 126 127 127 128 128 130 131 131 133 133 134 136 136 137 138 138 139 139 140 141 142 142 142 144 145 135 146 146 146 147 148 148 149 150 150 151 151 151 153 153 153 154 154 154 154 155 156 157 157 157 158 158 159 159 160 SYSTEMATIC INDEX. XXIX Aclicus 160 Bradypus 161 Megatherium 162 Megalonyx 162 Edentata Oiidinaria 162 Dasypus 162 Cachicamus 163 A para 163 Encoubei'tus 163 Cabassous 164 Priodon 164 Clam3q5horus 164 Orycteropus 165 Myrmecophaga 165 Manis 166 MoifOTREMATA 167 Echidna 168 Ornithorhynchus 168 PACHYDERMATA 169 PROBOSCIDIANA 170 Elephas 171 Mastodon 172 PACHYDEUMATA ORDI- NARIA 173 Hippopotamus 173 Sus 174 Sus proper 174 Phacochserus 175 Dicotyles 175 Anoplotherium 176 Rhinoceros 177 Hyrax 178 Palseotherium 178 Lophiodon 179 Tapir 179 SOLIPEDES 180 Equus 180 RUMINANTIA 182 Without Horns. Camelus 184 Camelus proper 184 Auchenia 185 Moschus 185 With Horns. Cervus 187 Camelopardalis 190 Antilope 191 Capra 198 Ovis 199 Bos 200 CETACEA 202 HERBIVQRA 203 Manatus 203 Halicore 204 Stellerus 204 ORDINARIA 204 Delphinus 206 Delphimis proper 206 Phocsena 207 Delphinapte- rus 209 Hyperoodon 209 Monodon 210 Physeter 211 Physeter 212 Balaena 212 Balsnoptera 214 Oviparou^ Vertebrata 215 AVES 217 ACCIPITRES 225 DIURN^ 225 Vultur 226 Vultur proper 226 Cathartes 227 Percnopterus 228 Gypaetos 229 Falco 229 JSTohiles 230 Falco proper 230 Hierofalco 219 Ignobiles 233 Aquila 233 Aquila proper 233 Halisetus 235 Pandion 236 Circaetus 236 Harpyia 237 Morphnus 238 Cymindis 239 Astur 239 Astur proper 239 Nisus 240 Milvus 241 Milvus proper 241 Pernis 242 Buteo 242 Circus 243 Serpentarius 244 NOCTURNE 245 Strix 245 Otiis 246 Ulula 247 Strix 247 Syrnium 247 Bubo 248 Noctua 248 Scops 250 PASSERINE 251 DENTIROSTRES 252 Lanius 252 Lanius proper 252 Vanga 255 Ocypterus 255 Barita 256 Chalyb3eus 256 XXX SYSTEMATIC INDEX. Psaris 256 Graucalus 257 Bethylus 257 Falcunculus 257 Pardalotus 258 Muscicapa 258 Tyrannus 258 Muscipeta 259 Platyrhynchus 259 Muscicapa 260 Gymiiocephalus 261 Chephalopterus 262 Ampelis 262 Ampelis 262 Tersina 263 Ceblepyris 263 Bombycilla 263 Procnias 264 Procnias pro- per 264 Casmarhyn- chiis 264 Gymnoderus 264 Edolius 265 Phibalura 265 Tanagra 265 Bulfinch Tanagers 266 GrossbeakTanagers 266 Tanagra proper 266 Oriole Tanagers 266 Cardinal Tanagers 266 Raraphoceline Tana- gers 267 Turdus 267 Turdus proper 267 Grives 268 Lamprotornis 270 Turdoides 270 Grallines 270 Criniger 270 Myothera 270 Orthonyx 272 Cinclus 272 Philedon 273 Eulabes 274 Gracula 274 Manorhina 276 Pyrrhocorax 276 Oriolus 276 Gymnops 277 Maenura 277 Motacilla 278 Saxicola 278 Sylvia 279 Curruca 279 Accentor 282 Regulus 283 Troglodytes 284 Motacilla 284 Motacilla pro- per 284 Budytes Anthus 284 285 Pipra 286 Rupicola 286 Calyptomenes 286 Pipra proper 286 Eurylaimus 286 FISSIROSTRES 286 Hirundo 287 Cypselus 287 Hirundo proper 288 Caprimulgus 289 Podargus 291 CONIROSTRES 291 Alauda 291 Parus 292 Parus proper 292 Bearded Titmouse 294 Remiz 294 Emberiza 294 Fringilla 296 Ploceus 296 Pyrgita 298 Fringilla 298 Carduelis 299 Linaria 299 Vidua 301 Coccothraustes 301 Pitylus 302 Pyrrhula 302 Loxia 302 Corythus 303 Colius 303 Buphaga 304 Cassicus 304 Cassicus proper 304 Icterus 305 Xanthornus 305 Ox)Thynchus 306 Dacnis 306 Sturnus 306 Corvus 307 Corvus proper 307 Pica 308 Garrulus 309 Caryocatactes 309 Temia 310 Glaucopis 310 Coracias 310 Coracias proper 310 Colaris 311 Paradisaea 311 TENUIROSTRES 313 Sitta 313 Xenops 314 Anabates 314 Synallaxis 314 Certhia 314 Certhia proper 314 SYSTEMATIC INDEX. XXXI Dendrocolaptes Tichodroma Nectarinia DIcxum Melithreptus Cinnyris Arachnothera Trochilus Trochilus proper Orthorhynchus Upupa Fregilus Upupa proper Promerops Epimachus SYNDACTYLJE Merops Prionites Alcedo Ceyx Todus Buceros SCANSORI^ Galbula Galbula proper Jacamerops Picus Picoldes Yunx Cuculus Cuculus propel Couas Centropua Courols Indicator Barbacous Malcoha Scythrops Bucco Barbicans Bucco proper Tamatia Trogon Crotophaga Ramphastos liamphastos proper 338 Pteroglossus """ Psittacus Ara Cornurus Cockatoos Psittacus proper Loris P^ittaculus Jit Peroquets a trompe 342 Pezoporus 342 Corythaix Musophaga 315 315 316 316 317 317 318 318 319 319 320 320 321 321 322 323 323 324 324 325 325 326 327 327 327 328 328 330 331 331 '332 ooo OOJ o oo OOO ooo 334 334 334 334 335 335 336 336 337 337 338 338 339 339 340 340 341 341 343 343 GALLINACE^ 343 Alector 344 Alector proper 345 Ourax 345 Penelope 346 Ortalida 347 Opisthocomus 347 Pavo 347 Lophophorus 348 Meleagris 349 Numida 349 Phasianus 350 Gallus 350 Phasianus pi-oper 351 Houppiferes 352 Tragopan 352 Cryptonyx 352 Tetrao 353 Tetrao proper 353 Lagopus 355 Ganga 355 Perdix 356 Francolinus 356 Perdix proper 356 Coturnix 357 Tridactylus 358 Turnix 358 Syrrhaptes 358 Tinamus 359 Columba 359 Columbi-gallines 360 Columba proper 360 Vinago 362 GRALLATORI^ 363 BUEVIPENNES 363 Struthio 364 Casuarius 365 PRESSmOSTRES '366 Otis 367 Charadrius 368 ffidicnemus 368 Charadrius propei 368 Vanellus 369 Squatarola 370 Vanellus proper 370 Hasmatopus 371 Cursorius 371 Cariama 372 CULTIROSTRES 372 Grus ' - 373 Psophia 373 Grus proper 374 Eurypyga 375 Cancroma 375 Ardea 376 Ai'dea proper 376 Crab eaters 376 Onores 377 XXXll SYSTEMATIC INDEX. Egrets 377 Bitterns 377 Night Herons 378 Ciconia 378 Mycteria 379 Scopus 380 Hians 380 Di'omas 380 Tantalus 381 Platalea 381 LONGIllOSTRES 382 Scolopax c^ o fi Ibis Numenius 384 Scolopax proper 385 Rhynchaea 386 Limosa 387 Calidris 387 Arenaria 388 Pelidna 388 Cocorli 389 Falcinellus 389 Machetes 389 Eurinorhynchus 390 Phalai-opus 390 Strepsllas 391 Totanus 391 Lobipes 393 Himantopus 393 Recurvirostra 394 MACRODACTYLI 394 Jacana 39 5 Palamedea 396 Chauna 396 Megapodius 397 Rallus 398 Fulica 399 Gallinula 399 Porphyrlo 399 Fulica proper 399 Chionis 400 Glareola 400 Phoenicopterus 401 PALMIPEDES 402 BRACHYPTERiE 402 Colymbus 403 Podiceps 403 Heliornis 404 Mergus 404 Uria 405 Cephus 405 Alca 406 JPratercula 406 Alca proper 406 Aptenodytes 407 Aptenody tes proper 407 Catarrhactes 407 Spheniscus 408 LONGIPENNES 408 Procellaria 408 Procellaria proper 409 Puffinus 410 Halodroma 410 Pachyptila 410 Diomedea 411 Larus 411 Goelands 412 Mauves 412 Stercorarius 413 Sterna 413 Noddies 415 Rynchops 415 TOTIPALMAT^ 415 Pelecanus 416 Pelecanus proper 416 Phalacrocorax 416 Tachypetes 417 Sula 417 Plotus 418 Phaeton 418 LAMELLIROSTRE^ 419 Anas ' 419 Cygnus 419 Anser 421 Auser proper 421 Bernacles 421 Cereopsis 421 Anas proper 422 Oldemia 423 Clangula 423 Somateria 424 Rynchaspis 426 Tadorna 426- Mergus 428 INTRODUCTION. As correct ideas respecting natural history are not very generally formed, it appears necessary to begin by defining its peculiar object, and establishing rigorous limits between it and neighbouring sciences. In our language and in most others, the word nature is variously employed. At one time it is used to express the qualities a being derives from birth, in opposition to those it inay owe to art ; at another, the entire mass of beings which compose the universe ; and at a third, the laws which govern those beings. It is in this latter sense particularly that we usually personify nature, and, through respect, use its name for that of its Creator. Physics, or Natural Philosophy, treats of the nature of these three relations, and is either general or particular. General physics examines abstractedly each of the properties of those movable and extended beings we call bodies. That branch of them styled Dynamics, considers bodies in mass ; and pro- ceeding from a very small number of experiments, determines mathematically the laws of equilibrium, and those of motion and of its communication. Its different divisions are termed Statics, Hydrostatics, Hydrodynamics, Mechanics, &c. &c., according to the nature of the particular bodies whose motions it examines. Optics considers the particular motions of light, whose phenomena, which hitherto nothing but experiment has been able to determine, are becoming more numerous. Chemistry, another branch of general physics, exposes the laws by which the elementary molecules of bodies act on each Vol. I A k5 INTRODUCTION. other; the combinations or separations which result from the general tendency of these molecules to re-unite; and the modifications which the various circumstances capable of se- parating or approximating them produce on that tendency. It is purely a science of experiment;, and is irreducible to calcu- lation. The theory of heat and that of electricity belong either to dynamics or chemistry, according to the point of view in which they are considered. The ruling method in all the branches of general physics consists in isolating bodies, reducing them to their greatest simplicity, in bringing each of their properties separately into action, either by reflection or experiment, and by observing or calculating the results ; and finally, in generalising and con- necting the laws of these properties, so as to form codes, and, if it were possible, to refer them to one single principle into which they might all be resolved. The object of Particular Physics, or of J^atural History for the terms are synonymous is the special application of the laws recognised by the various branches of general phy- sics to the numerous and varied beings which exist in nature, in order to explain the phenomena which each of them pre- sents. Within this extensive range, astronomy also would be in- cluded ; but that science, sufficiently elucidated by mechanics, and completely subjected to its laws, employs methods, differ- ing too widely from those required by natural history, to per- mit it to be cultivated by the students of the latter. Natural history, then, is confined to objects which do not allow of exact calculation, nor of precise measurement in all their parts. Meteorology also is substracted from it and united to general physics ; so that, properly speaking, it considers only inanimate bodies called minerals, and the different kinds of living beings, in all of which we may observe the effects, more or less various, of the laws of motion and chemical attraction, and of all the other causes analysed by general physics. Natural history, in strictness, should employ similar methods with the general sciences ; and it does so, in fact, whenever the INTRODUCTION. 3 objects it examines arc sufiiciently simple to allow it. This, however, is but very rarely the case. An essential difference between the general sciences and natural history is, that in the former, phenomena are examin- ed, whose conditions are all regulated by the examiner, in order, by their analysis, to arrive at general laws ; whereas in the latter, they take place under circumstances beyond the control of him who studies them for the purpose of discover- ing amid the complication, the effects of known general laws. He is not, like the experimenter, allowed to subtract them suc- cessively from each condition, and to reduce the problem to its elements he is compelled to take it in its entireness, with all its conditions at once, and can perform the analysis only in thought. Suppose, for example, we attempt to insulate the numerous phenomena which compose the life of any of the higher orders of animals ; a single one being suppressed, every vestige of life is annihilated. Dynamics have thus nearly become a science of pure calcu- lation ; chemistry is still a science of pure experiment ; and natural history, in a great number of its branches, will long remain one of pure observation. These three terms sufficiently designate the methods em- ployed in the three branches of the natural sciences ; but in establishing between them very different degrees of certitude, they indicate, at the same time, the point to which they should incessantly tend, in order to attain nearer and nearer to per- fection. Calculation, if we may so express it, thus commands nature, and determines her phenomena more exactly than observation can make them known ; experiment compels her to unveil ; while observation pries into her secrets when refractory, and endeavours to surprise her. There is, however, a principle peculiar to natural history, which it uses with advantage on many occasions; it is that of the conditio?iSiof existence^ commonly styled fmal causes. As nothing can exist without the re-union of those conditions which render its existence possible, tlie component parts of each being must be so arranged as to render possible the whole 4 INTRODUCTION. being, not only with regard to itself but to its surrounding relations. The analysis of these conditions frequently con- ducts us to general laws, as certain as those that are derived from calculation or experiment. It is only when all the laws of general physics and those which result from the conditions of existence are exhausted, that we are reduced to the simple laws of observation. The most effectual method of obtaining these, is that of comparison. This consists in successively observing the same bodies in the different positions in which nature places them, or in a mutual comparison of different bodies ; until we have ascertained invariable relations between their structures and the phenomena they exhibit. These various bodies are kinds of experiments ready prepared by nature, who adds to or de- ducts from each of them different parts, just as we might wish to do in our laboratories ; showing us, herself, at the same time their various results. In this way we finally succeed in establishing certain laws by which these relations are governed, and which are em- ployed like those that are determined by the general sciences. The incorporation of these laws of observation with the general laws, either directly or by the principle of the con- ditions of existence, would complete the system of the natural sciences, in rendering sensible in all its parts the mutual in- fluence of every being. To this end, should those who culti- vate these sciences direct all their efforts. All researches of this nature, however, pre-suppose means of distinguishing clearly^ and causing others to distinguish, the bodies they are occupied with ; otherwise we should be con- tinually confounding them. Natural history then should be based on what is called a system of nature; or a great cata- logue in w^hich all created beings have suitable names, may be recognised by distinctive characters, and be arranged in divi- sions and subdivisions, themselves named and characterised, in which they may be found. In order that each being may be recognised in this catalogue, it must be accompanied by its character: liabits or properties INTRODUCTIONo 5 which are hut momentary cannot, then, furnish characters they must he drawn from tlic conformation. There is scarcely a single hcing which has a simple charac- ter, or can he recognised hy one single feature of its conforma- tion ; a union of several of these traits are almost always re- quired to distinguish one heing from those that surround it, who also have some but not all of them, or who have them combined with others of which the first is destitute. The more numerous the beings to be distinguished, the greater should be the number of traits ; so that to distinguish an indi- vidual being from all others, a complete description of it should enter into its character. It is to avoid this inconvenience, that divisions and subdi- visions have been invented. A certain number only of neigh- bouring beings are compared with each other, and their cha- racter need only to express their differences, which, by the supposition itself, are the least part of their conformation. Such a re-union is termed a genus. The same inconvenience would be experienced in distin- guishing genera from each other, were it not for the repetition of the operation in uniting the adjoining genera, so as to form an order, the orders to form a class, &c. Intermediate sub- divisions may also be established. This scaffolding of divisions, the superior of which contain the inferior, is called a tnethod. It is in some respects a sort of dictionary, in which we proceed from the properties of things to arrive at their names; being the reverse of the common ones, in which we proceed from the name to arrive at the property. When the method is good, it does more than teach us names. If the subdivisions have not been established arbitrarily, but are based on the true fundamental relations, on the essential resemblances of beings, the method is the surest means of re- ducing the properties of beings to general rules, of expressing them in the fe^west words, and of stamping them on the me- mory. To render it such, we einploy an assiduous comparison of beings, directed by the principle of the subordination of cha- INTRODUCTION, ractcrs^ which is itself derived from that of the; conditions of existence. The parts of a being possessing a mutual adapta- tion, some traits of character exclude others, while on the contrary, there are others that ref^uire them. When, there- fore, we perceive such or such traits in a being, we can calcu- late before hand those that co-exist in it, or those that are incompatible with them. The parts, the properties, or the traits of conformation, which have the greatest number of these relations of incompatibility or of co-existence with others, or, in other words, that exercise the most marked influence upon the whole of the being, are called the important charac- ters^ dominating characters ; the others are the subordinate characters, all varying in degree. This influence of characters is sometimes determined ration- ally, by the consideration of the nature of the organ. When this is impracticable, we have recourse to simple observation ; and a sure mark by which wx may recognise the important characters, and one which is drawn from their own nature, is their superior constancy, and that in a long series of different beings, approximated according to their degrees of similitude, these characters are the last to vary. That they should be preferred for distinguishing the great divisions, and that in proportion as we descend to the inferior subdivisions, we can also descend to subordinate and variable characters, is a rule resulting equally from their influence and constancy. There can be but one perfect method, which is the natural method. We thus name an arrangement in which beings of the same genus are placed nearer to each other than to those of the other genera ; the genera of the same order nearer than those of the other orders, &c. &c. This method is the ideal to which natural history should tend ; for it is evident that if we can reach it, we shall have the exact and complete expression of all nature. In fact, each being is determined by its resem- blance to others, and difference from them ; and all these rela- tions would be fully given by the arrangement in question. In a word, the natural method would be the whole science, and every step towards it tends to advance the science to per- fection. INTRODUCTION. 7 Life being the most important of all the properties of be- ings, and the highest of all characters, it is not surprising that it has in all ages been made the most general principle of dis- tinction ; and that natural beings have always been separated into two immense divisions, the living and the inanimate. Of Living Beings, and Organization in general. If, in order to obtain a correct idea of the essence of life, we consider it in those beings in which its effects are the most simple, we quickly perceive that it consists in the faculty pos- sessed by certain corporeal combinations, of continuing for a time and under a determinate form, by constantly attracting into their composition a part of surrounding substances, and rendering to the elements, portions of their own. Life then is a vortex, more or less rapid, more or less com- plicated, the direction of which is invariable, and which always carries along molecules of similar kinds, but into which indi- vidual molecules are continually entering, and from which they are continually departing; so that the form of a living body is more essential to it than its matter. As long as this motion subsists, the body in which it takes place is living it lives. When it finally ceases, it dies. After death, the elements which compose it, abandoned to the ordinary chemical affinities, soon separate, from which, more or less quickly, results the dissolution of the once living body. It was then by the vital motion that its dissolution was arrest- ed, and its elements were held in a temporary union. All living bodies die after a certain period, whose extreme limit is fixed for each species, and death appears to be a ne- cessary consequence of life, which, by its own action, insensi- bly alters the structure of the body, so as to render its conti- nuance impossible. In fact, the living body undergoes gradual, but continual changes, during the whole term of its existence. At first, it increases in diAiensions, according to proportions, and within limits, fixed for each species and for each one of its parts ; it then augments in density in the most of its parts: it is this b INTRODUCTION. second kind of change that appears to be the cause of natural death. If we examine the various living bodies more closely, we find they possess a common structure, which a little reflection soon causes us to perceive is essential to a vortex such as the vital motion. Solids, it is plain, are necessary to these bodies, for the maintenance of their forms ; and fluids for the conservation of motion in them. Their tissue, accordingly, is composed of network and plates, or of fibres and solid laminse, within whose interstices are contained the fluids ; it is in these fluids that the motion is most continued and extended. Foreign suId- stances penetrate the body and unite with them ; they nourish the solids by the interposition of their molecules, and also de- tach from them those that are superfluous. It is in a liquid or gaseous form that the matters to be exhaled traverse the pores of the living body ; but in return, it is the solids which contain the fluids, and by their contraction communicate to them part of their motion. This mutual action of the fluids and solids, this transition of molecules, required considerable afiinity in their chemical' composition ; and such is the fact the solids of organized bo- dies being mostly composed of elements easily convertible into' fluids or gases. The motion of the fluids needing also a constantly repeated action on the part of the solids, and communicating one to them, required in the latter both flexibility and dilatability; and accordingly we find this character nearly general in all organized solids. This structure, common to all living bodies; this areolar tis- sue, whose more or less flexible fibres or laminse intercept fluids more or less abundant j constitutes what is called the organi- zation. As a consequence of what we have said, it follows^ that life can be enjoyed by organized bodies only. Organization, then, results from a great variety of aiTange- ments, which are all conditions of life ; and it is easy to con- ceive, that if its effect be to alter either of these conditions, so \ INTRODUCTION. 9 as to arrest even one of the partial motions of which it is com- posed, the general movement of life must cease. Every organized body, independently of the qualities com- mon to its tissue, has a form peculiar to itself, not merely ge- neral and external, but extending to the detail of the structure of eacli of its parts ; and it is upon this form, which determines the particular direction of each of the partial movements that take place in it, that depends the complication of the general movement of its life it constitutes its species and renders it what it is. Each part co-operates in this general movement by a peculiar action, and experiences from it particular effects, so that in every being life is a whole, resulting from the mu- tual action and re-action of all its parts. Life, then, in general, pre-supposes organization in gene- ral, and the life proper to each individual being pre-supposes an organization peculiar to that being, just as the movement of a clock pre-supposes the clock ; and accordingly we behold life only in beings that are organized and formed to enjoy it, and all the efforts of philosophy have never been able to dis- cover matter in the act of organization, neither per se, nor by any external cause. In fact, life exercising upon the elements which at every moment form part of the living body, and upon those which it attracts to it, an action contrary to that which, without it, would be produced by the usual chemical affinities, it seems impossible that it can be produced by these affinities, and yet we know of no other power in nature capa- ble of re-uniting previously separated molecules. The birth of organized beings is, therefore, the greatest mystery of the organic economy and of all nature : we see them developed, but never being formed ; nay more, all those whose origin we can trace, have at first been attached to a body similar in form to their own, but which was developed before them in a word, to apparent. So long as the offspring has no independent existence, but participates in that of its parent, it is called a germ. The place to which the germ is attached, an^. the cause which detaches it* and gives it an independent life, vary ; but Vol. I. B 10 INTRODUCTION. this primitive adhesion to a similar being, is a rule without exception. The separation of the germ is called generation. Every organized being re-produces others that are similar to itself, otherwise, death being a necessary consequence of life, the species would become extinct. Organized beings have even the faculty of reproducing, in degrees varying with the species, particular parts of which they may have been deprived this is called \he power of re- production. The development of organized beings is more or less rapid, and more or less extended, as circumstances are more or less favourable. Heat, the abundance and species of nutriment, with other causes, exercise great influence, and this influence may extend to the whole body in general, or to certain organs in particular : thence arises the impossibility of a perfect similitude between the offspring and parent. Diff'erences of this kind, between organized beings, form what are termed varieties. There is no proof, that all the differences which now dis- tinguish organized beings, are such as may have been pro- duced by circumstances. All that has been advanced upon this subject is hypothetical. Experience, on the contrary, ap- pears to prove, that, in the actual state of the globe, varieties are confined within rather narrow limits, and go back as far as we may, we still find those limits the same. We are thus compelled to admit of certain forms, which, from the origin of things, have perpetuated themselves with- out exceeding these limits, and every being appertaining to one or other of these forms, constitutes what is termed a spe- cies. Varieties are accidental subdivisions of species. Generation being the only means of ascertaining the limits to which varieties may extend, species should be defined, the re-union of individuals descended one from the other, or from common parents, or from such as resemble them, as strongly as they resemble each other. Rut although this definition is strict, it will be seen that its application to particular indivi- duals may be very difficult, vi^here the necessary experiments have not been made. INTRODUCTION. 11 Thus then it stands absorption, assimilation, exhalation, development and generation are functions common to all liv- ing bodies ; birth and death the universal limits of their exist- ence ; an areolar, contractile tissue, containing within its laminsa fluids or gases in motion, the general essence of its struc- ture ; substances almost all susceptible of conversion into fluids or gases, and combinations capable of an easy and mutual transformation, the basis of their chemical composition. Fixed forms that are perpetuated by generation distinguish their species, determine the complication of the secondary functions proper to each of them, and assign to them tlie parts they are to play on the great stage of the universe. These forms are neither produced nor changed by their own agency life sup- poses their existence, its flame can only be kindled in an organization already prepared, and the most profound medita- tion and lynx-eyed and delicate observation can penetrate no farther than the mystery of the pre-existence of germs. Division of Organized Beings into Animals and Vegetables. Living or organized beings have always been subdivided into animate beings^ that is, such as are possessed of sense and motion, and into inanimate bei?igs, which are deprived of both these faculties, and are reduced to the simple faculty of vegetating. Although the leaves of several plants shrink from the touch, and the roots are steadily directed towards moisture, the leaves to light and air, and though parts of vegetables appear to oscillate without any apparent external cause, still these various motions have too little similarity to those of animals, to enable us to find in them any proofs of perception or will. The spontaneity in the motions of animals required essen- tial modifications even in their purely vegetative organs. Their roots not penetrating the earth, it was necessary they should be able ^to place within themselves a supply of aliment, and to carry its reservoir along with them. Hence is derived the first character of animals, or their alimentary canal, from 12 INTRODUCTION. which their nutritive fluid penetrates all other parts through pores or vessels, which are a kind of internal roots. The organization of this cavity and its appurtenances re- quired varying, according to the nature of the aliment, and the operation it had to undergo, before it could furnish juices fit for absorption; whilst the air and earth present to ve- getables 'nought but elaborated juices ready for absorption. The animal, whose functions are more numerous and varied than those of the plant, consequently necessitated an organiza- tion much more complete ; besides this, its parts not being capable of preserving one fixed relative position, there were no means by which external causes co\ild produce the motion of their fluids, which required an exemption from atmospheric influence ; from this originates the second character of animals, their cii^culating system^ one less essential than that of diges- tion, since in the more simple animals it is unnecessary. The animal functions required organic systems, not needed by ve- getables that of the muscles for voluntary motion, and nerves for sensibility ; and these two systems, like the rest, acting only through the motions and transformations of the fluids, it was necessary that these should be most numerous in animals, and that the chemical composition of the animal body be more com- plex than that of the plant; and so it is, for one substance more (azote) enters into it as an essential element, whilst in plants it is a mere accidental junction with the three other general elements of organization, oxygen, hydrogen, and carbon. This then is the third character of animals. From the sun and atmosphere, vegetables receive for their nutrition water, which is composed of oxygen and hydrogen ; air, which contains oxygen and azote ; and carbonic acid, which is a combination of oxygen and carbon. To extract their own composition from these aliments, it was necessary they should retain the hydrogen and carbon, exhale the super- fluous oxygen and absorb little or no azote. Such, in fact, is vegetable life, whose essential function is the exhalation of oxygen, which is effected through the agency of light. Animals also derive nourishment, directly or indirectly, from the vegetable itself, in which hydrogen and carbon form INTRODUCTION. 13 the principal parts. To assimilate them to their own compo- sition, they must get rid of the superabundant hydrogen and carbon in particular, and accumulate more azote, which is performed through the medium of respiration, by which the oxygen of the atmosphere combines with the hydrogen and carbon of their blood, and is exhaled with them in the form of water and carbonic acid. The azote, whatever part of the body it may penetrate, seems always to remain there. The relations of vegetables and animals to the surrounding atmospliere are therefore in an inverse ratio the former re- ject water and carbonic acid, while the latter produce them. The essential function of the animal body is respiration, it is that which in a manner animalizes it, and we shall see that the animal functions are the more completely exercised, in proportion to the greatness of the powers of respiration pos- sessed by the animal. This difference of relations constitutes the fourth character of animals. Of the forms peculiar to the Organic Elements of the Ani- mal Body, and of the principal combinations of its Che- mical Elements. An areolar tissue and three chemical elements are essential to every living body ; there is a fourth element peculiarly re- quisite to that of an animal ; but this tissue is composed of variously formed meshes, and these elements are variously combined. There are three kinds of organic materials or forms of tex- ture, the cellular memh^ane, the muscular fibre, and the me- dullary matter, and to each form belongs a peculiar combina- tion of chemical elements, as well as a particular function. The cellular substance is composed of an infinity of small fibres and laminse, fortuitously disposed, so as form little cells that communicate with each other. It is a kind of sponge, which has the ,sarae form as the body, all other parts of which traverse or fill it, and contracting indefinitely, on the removal of the causes of its tension. It is this power that retains the body in a given form and within certain liipits. 14 INTRODUCTION. . When condensed., this substance forms those laminse called membranes ; the memhranes; rolled into cylinders, form those more or less ramified tubes named vessels; the filaments called fibres are resolved into it, and bones are nothing but the same thing indurated by the accumulation of earthy particles. The cellular substance consists of a combination well known as gelatine, characterised by its solubility in boiling water, and forming, when cold, a trembling jelly. We have not yet been able to reduce the medullary ^natter to its organic molecules ; to the naked eye, it appears like a sort of soft bouillie, consisting of excessively small globules ; it is not susceptible of any apparent motion, but in it resides the admirable power of transmitting to the me the impressions of the external senses, and conveying to the muscles the orders of the will. It constitutes the greater portion of the brain and the spinal marrow, and the nerves which are distributed to all the sentient organs are, essentially, mere fasciculi of its rami- fications. The fleshy or muscular fibre is a peculiar sort of filament, whose distinctive property, during life, is that of contracting when touched or struck, or when it experiences the action of the will through the medium of the nerve. The muscles, direct organs of voluntary motion, are mere bundles of fleshy fibres. All vessels and membranes which have any kind of compression to execute are armed with these fibres. They are always intimately connected with nervous threads, but those which belong to the purely vegetative func- tions contract, without the knowledge of the me, so that, al- though the will is truly a means of causing the fibres to act, it is neither general nor unique. The fleshy fibre has for its base a particular substance called fibrine, which is insoluble in boiling water, and which seems naturally to assume this filamentous disposition. The nutritive fluid or the blood, such as we find it in the vessels of the circulation, is not only mostly resolvable into the general elements of the animal body, carbon, hydrogen, oxygen and azote, but it also contains fibrine and gelatine, almost prepared to contract and to assume the forms of membranes INTRODUCTION. 15 or filaments peculiar to them, all that is ever wanted for their manifestation being a little repose. The blood also con- tains another combination, which is found in many animal fluids and solids, called albumen, whose characteristic property is that of coagulating in boiling water. Besides these, the blood contains almost every element which may enter into the com- position of the body of each animal, such as the lime and phosphorus which harden the bones of vertebrated animals, the iron from which it and various other parts receive their colour, the fat or animal oil which is deposited in the cellular substance to supple it, &c. All the fluids and solids of the animal body are composed of chemical elements found in the blood, and it is only by possessing a few elements more or less, that each of them is distinguished; whence it is plain, that their formation entirely depends on the subtraction of the whole or part of one or more elements of the blood, and in some few cases, on the addition of some element from else- where. These operations, by which the blood nourishes the fluid or solid matter of all parts of the body, may assume the general name of secretions. This name, however, is often appropriated exclusively to the production of liquids ; while that of nutri- tion is more especially applied to the formation and deposition of the matter necessary to the growth and conservation of the solids. The composition of every solid organ, of every fluid is pre- cisely such as fits it for the part it is to play, and it preserves it as long as health remains, because the blood renews it as fast as it becomes changed. The blood itself by this continued contribution is changed every moment, but is restored by di- gestion, which renews its matter by respiration, which delivers it from superfluous carbon and hydrogen, by perspiration and various other excretions, that relieve it from other superabun- dant principles. These perpetual changes of chemical composition form a part of the vital vortex, not less essential than the visible movements and those of translation. The object of the latter is, in fact, but to produce the former. 16 INTRODUCTION. Of the forces which act in the Animal Body. The muscular fibre is not only the organ of voluntary mo- tion, for we have just seen that it is also the most powerful of the agents employed by nature to produce those transmutations so necessary to vegetative life. Thus the fibres of the intes- tines produce the peristaltic motion, which causes the alimen- tary matter therein contained to pass through them ; the fibres of the heart and arteries are the agents of the circulation and through it of all the secretions, &c. Volition contracts the fibre through the medium of the nerve ; and the involuntary fibres, such as those we have men- tioned, being also animated by them, it is probable that these nerves are the cause of their contraction. All contraction, and generally speaking, every change of dimension in nature, is produced by a change of chemical composition, though it consist merely in the flowing or ebbing of an imponderable fluid, such as caloric; thus also are pro- duced the most violent movements known upon earth, explo- sions, &c. There is, consequently, good reason to suppose that the nerve acts upon the fibre through the medium of an impon- derable fluid, and the more so, as it is proved that this action is not mechanical. The medullary matter of the whole nervous system is ho- mogeneous, and must be able to exercise its peculiar func- tions wherever it is found; all its ramifications are abundantly supplied with blood vessels. All the animal fluids being drawn from the blood by secre- tion, we can have no doubt that such is the case with the ner- vous fluid, and that the medullary matter secretes it. On the other hand, it is certain that the medullary matter is the sole conductor of the nervous fluid ; all the other or- ganic elements restrain and arrest it, as glass arrests electri- city. The external causes which are capable of producing sensa- tions or causing contractions of the fibre are all chemical INTRODUCTION. 17 agents, capable of effecting decompositions, such as light, caloric, the salts, odorous vapours, percussion, compression, &c. &c. It would appear then that these causes act on the nervous fluid chemically, and by changing its composition ; this ap- pears the more likely, as their action becomes weakened by continuance, as if the nervous fluid needed the resumption of its primitive composition, to fit it for a fresh alteration. The external organs of the senses may be compared to sieves, which allow nothing to pass through to the nerve, ex- cept that species of agent which should affect it in that par- ticular place, but which often accumulates it so as to increase its effect. The tongue has its spongy papillae which imbibe saline solutions ; the ear, a gelatinous pulp which is violently agitated by sonorous vibrations ; the eye, transparent lenses which concentrate the rays of light, &c. &c. It is probable, that what are styled irritants, or the agents which occasion the contractions of the fibre, exert this ac- tion by producing on the fibre, by the nerve, a similar effect to that produced on it by the will ; that is, by altering the ner- vous fluid, in the way that is requisite to change the dimen- sions of the fibre which it influences : but with this process the will has nothing to do, and very often the me is entirely ignorant of it. The muscles separated from the body pre- serve their susceptibility of irritation, as long as the portion of the nerve that remains with them preserves the power of acting on them with this phenomenon the will has evidently no connexion. The nervous fluid is altered by muscular irritation, as well as by sensibility and voluntary motion, and the same necessity exists for the re-establishment of its primitive composition. The transmutations necessary to vegetable life are occasioned by irritants ; the aliment irritates the intestine, the blood irri- tates the heart, &c. These movements are all independent of the will, a|id generally (while in health) take place without the knowledge of the me ; in several parts, the nerves that produce them are even differently arranged from those that are appropriated to sensation or dependent on the will, and Vol. I. C 18 INTRODUCTION. the very object of this difference appears to be the securing of this independence. The nervous functions^, that is, sensibility and muscular ir- ritability, are so much the stronger at every point, in pro- portion as their exciting cause is abundant; and as this cause or the nervous fluid is produced by secretion, its abundance must be in proportion to the quantity of medullary or secre- tory matter, and the amount of blood received by the latter. In animals that have a circulating system, the blood is pro- pelled through the arteries which convey it to its destined parts, by means of their irritability and that of the heart. If these arteries be irritated, they act more strongly, and pro- pel a greater quantity of blood ; the nervous fluid becomes more abundant and augments the local sensibility ; this, in its turn, augments the irritability of the arteries, so that this mu- tual action may sometimes be carried to a great extent. It is called oi^gasm, and when it becomes painful and permanent, inflarmnation. The irritation may also originate in the nerve when exposed to the influence of acute sensations. This mutual influence of the nerves and fibres, either in- testinal or arterial, is the real spring of vegetative life in ani- mals. As each external sense is permeable only by such or such sensible substances, so each internal organ may be accessible only to this or that agent of irritation. Thus, mercury irri- tates the salivary glands, cantharides irritate the bladder, &c. These agents are called specifics. The nervous system being homogeneous and continuous, local sensations and irritation debilitate the whole, and each function, by excessive action, may weaken the others. Ex- cess of aliment weakens the power of thought, while long con- tinued meditation impairs that of digestion, &c. Excessive local irritation will enfeeble the whole body, as if all the powers of life were concentrated in one single point. A second irritation produced at another part may diminish, or divert, as it is termed, the first : such is the efi'ect of blis- ters, purgatives, &c. Brief as our sketch has been, it is'suiflici^nt to establish the INTRODUCTION. 19 possibility of accounting for all the phenomena of physical life, from the properties it presents^, by the simple admission of a fluid such as we have defined. Summary idea of the Functions and Organs of the Bodies of Animalsy and of their various degrees of Complication. After what we have stated respecting the organic elements of the body, its chemical principles and acting powers, no- thing remains but to give a summary idea of the functions of which life is composed, and of their appropriate organs. The functions of the animal body are divided into two classes : The animal functions, or those proper to animals, that is to say, sensibility and voluntary motion. The vital, vegetative functions, or those common to animals and vegetables, i. e., nutrition and generation. Sensibility resides in the nervous system. The most general external sense is that of touch ; it is seated in the skin, a membrane that envelopes the wlhole body, which is traversed in every direction by nerves whose extreme fila- ments expand on the surface into papillae, and are protected by the epidermis and other insensible teguments, such as hairs, scales, &c. &c. Taste and smell are merely delicate states of the sense of touch, for which the skin of the mouth and nos- trils is particularly organized : the first, by means of papillae more convex and spongy ; the second, by its extreme delicacy and the multiplication of its ever humid surface. We have already spoken of the ear and the eye. The organ of gene- ration is endowed with a sixth sense, seated in its internal skin ; that of the stomach and intestines declares the state of those viscera by peculiar sensations. In fine, sensations more or less painful may originate in every part of the body through accident or disease. Many anijiuals have neither ears nor nostrils, several are without eyes, and some are reduced to the single sense of touch, which is never absent. 20 INTRODUeTION. The action received by the external organs is continued by the nerves to the central masses of the nervous system^ which, in the higher animals, consists of the brain and spinal mar- row. Tiie more elevated the nature of the animal, the more voluminous is the brain and the more is the sensitive power concentrated there ; the lower the animal, the more the me- dullary masses are dispersed, and in the most imperfect genera, the entire nervous substance seems to melt into the general matter of the body. That part of the body which contains the brain and princi- pal organs of sense, is called the head. When the animal has received a sensation, and this has oc- casioned volition ; it is by the nerves, also, that this volition is transmitted to the muscles. The muscles are bundles of fleshy fibres whose contractions produce all the movements of the animal body. The exten- sion of the limbs and every elongation, as well as every flexion, and abbreviation of parts, are the effects of muscular contrac- tion. The muscles of every animal are arranged, both as re- spects number and direction, according to the movements it has to make; and when these motions require force, the muscles are inserted into hard parts, articulated one over an- other, and may be considered as so many levers. These parts are called bones in the vertebrated animals, where they are in- t-ernal, and are formed of a gelatinous mass, penetrated by par- ticles of phosphate of lime. In the Mollusca, the Crustacea, and Insects, where they are external, and composed of a cal- careous or horny substance that exudes between the skin and epidermis, they are called shells, crusts and scales. The fleshy fibres are attached to tlie hard parts by means of other fibres of a gelatinous nature, which seem to be a con- tinuation of the former, constituting what are called tendons. The configuration of the articulating surfaces of the hard parts limits their motion, which are also restrained by cords or envelopes, attached to the sides of the articulations, called ligaments. It is from the various arrangements of tliis bony and mus- cular apparatus, and the form and proportion of the members INTRODUCTION. 21 therefrom resulting, that animals are capable of executing the innumerable movements that enter into walking and leaping, flight and natation. The muscular fibres, appropriated to digestion and the cir- culation, are independent of the will ; they receive nerves, however, but the chief of them are subdivided and arranged in a manner which seems to have for its object their indepen- dence of the ME. It is only in paroxysms of the passions and other powerful affections of the soul, which break down these barriers, that the empire of the me is perceptible, and even then it is almost always to disorder these vegetative functions. It is, also, in a state of sickness only that these functions are accompanied with sensations: digestion is usually performed unconsciously. The aliment divided by the jaws and teeth, or sucked up when liquids constitute the food, is swallowed by the muscu- lar movements of the hinder parts of the mouth and throat, and deposited in the first portions of the alimentary canal that is usually expanded into one or more stomachs; there it is penetrated with juices fitted to dissolve it. Passing thence through the rest of the canal, it receives other juices destined to complete its preparation. The parietes of the canal are pierced with pores which extract from this alimentary mass its nutritious portion; the useless residuum is rejected as ex- crement. The canal in which this first act of nutrition is performed, is a continuation of the skin, and is composed of similar lay- ers; even the fibres that encircle it are analogous to those which adhere to the internal surface of the skin, called the fleshy pannicle. Throughout the whole interior of this canal there is a transudation which has some connexion with the cu- taneous perspiration, and which becomes more abundant when the latter is suppressed ; the absorption of the skin is even very analogous to that of the intestines. It is in the lowest order of animala that the excrements are rejected by the mouth, their intestines resembling a sac, with but the one opening. Even among those where the intestinal canal has two ori- 22 INTRODUCTION. fices, there are many in which the nutritive juices being ab- sorbed by the parietes of the intestine, are immediately dif- fused throughout the whole spongy substance of the body : such, it would appear, is the case with all Insects. But from the Arachnoides and Worms upwards, the nutritive fluid circu- lates in a system of closed vessels, whose ultimate ramifications alone dispense its molecules to the parts that are nourished by it; the vessels that convey it are called arteries^ those that bring it back to the centre of the circulation, veins. The circulating vortex is here simple, and there double and even triple (including that of the vena portse) ; the rapidity of. its motion is often assisted by the contractions of a certain fleshy apparatus called a heart, which is placed at one or the other centres of circulation, and sometimes at both of them. In the red-blooded vertebrated animals, the nutritive fluid exudes from the intestines, white or transparent, and is then termed chyle; it is poured into the veins where it mingles with the blood, by two peculiar vessels called lacteals. Ves- sels similar to these lacteals, and forming with them an arrange- ment called the lymphatic system, also convey to the venous blood the residue of the nutrition of the parts and the pro- ducts of cutaneous absorption. Before the blood is fit to nourish the parts, it must expe- rience from the circumambient element the modification of which we have previously spoken. In animals possessing a circulating system, one portion of the vessels is destined to carry the blood into organs in which they spread it over a great surface to obtain an increase of this elemental influence. When that element is air, the surface is hollow, and is called lungs; when it is water, it is salient, and is termed hranchise. There is always an arrangement of the organs of motion for the purpose of propelling the element into, or upon, the organ of respiration. In animals destitute of a circulating system, air is diffused through every part of the body by elastic vessels called tra- chese; or water acts upon them, either by penetrating through vessels, or by simply bathing the surface of the skin. The respired, or purified blood is properly qualified for restoring INTRODUCTION. 23 the composition of all the parts, and to effect what is properly called nutrition. This facility, which the blood possesses, of decomposing itself at every point, so as to leave there the precise kind of molecule necessary, is indeed wonderful ; but it is this wonder which constitutes the whole vegetative life. For the nourishment of the solids we see no other arrangement than a great subdivision of the extreme arterial ramifications, but for the production of fluids the apparatus is more complex and various. Sometimes the extremities of the vessels simply spread themselves over large surfaces, whence the produced fluid exhales ; at others it oozes from the bottom of little cavi- ties. Before these arterial extremities change into veins, they most commonly give rise to particular vessels that convey this fluid, which appears to proceed from the exact point of union between the two kinds of vessels ; in this case the blood ves- sels and these latter form, by interlacing, particular bodies call- ed conglomerate or secretory glands. In animals that have no circulation, in Insects particularly, the parts are all bathed in the nutritive fluid : each of these parts draws from it what it requires, and if the production of a liquid be necessary, proper vessels floating in the fluid take up by their pores the constituent elements of that liquid. It is thus that the blood incessantly supports the composi- tion of all the parts, and repairs the injuries arising from those changes which are the continual and necessary consequences of their functions. The general ideas we form with respect to this process are tolerably clear, although we have no dis- tinct or detailed notion of what passes at each point, and for want of knowing the chemical composition of each part with sufficient precision, we cannot render an exact account of the transmutations necessary to effect it. Besides the glands which separate from the blood those fluids that are destined for the internal economy, there are some which detach others from it that are to be totally eject- ed, either as superfluous the urine, for instance, which is produced by the kidneys; or for some use to the animal, as the ink of the cuttle-fish, and the purple matter of various mol- lusca, &c. 34 INTRODUCTION. With respect to generation^ there is a process or phenome- non, infinitely more difficult to comprehend than that of the secretions the production of the germ. We have even seen that it is to be considered as almost incomprehensible ; but the existence of the germ being admitted, generation presents no particular difficulties. As long as it adheres to the parent, it is nourished as if it were one of its organs, and when it de- taches itself, it possesses its own life, which is essentially simi- lar to that of the adult. The germ, the embryo, the foetus, and the new-born ani- mal have never, however, exactly the same form as the adult, and the difference is sometimes so great, that their assimilation has been termed a metamorphosis. Thus, no one not previ- ously aware of the fact would suppose that the caterpillar is to become a butterfly. Every living being is more or less metamorphosed in the course of its growth ; that is, it loses certain parts, and deve- lopes others. The antennse, wings, and all the parts of the butterfly were enclosed beneath the skin of the caterpillar , this skin vanishes along with the jaws, feet, and other organs, that do not remain with the butterfly. The feet of the frog are enclosed by the skin of the tadpole ; and the tadpole, to become a frog, parts with its tail, mouth, and branchiae. The child, at birth, loses its placenta and membranes ; at a certain period its thymus gland nearly disappears, and it gradually acquires hair, teeth, and beard; the relative size of its organs is altered, and its body augments in a greater ratio than its head, the head more than the internal ear, &c. The place where these germs are found, and their germs themselves are collectively styled the ovary; the canal through which, when detached, they are carried into the uterus, the oviduct; the cavity in which, in many species, they are com- pelled to remain for a longer or shorter period previous to birth, the uterus; and the external orifice through which they pass into the world, the vulva. Where there are sexes, the male impregnates, the germs appearing in the female. The fecundating liquor is called semen; the glands that separate INTRODUCTION. 25 it from the blood, testes; and when it is requisite it should be carried into the body of the female, the introductory organ is named a penis. Of the Intellectual Functions of Animals. The impression of external objects upon the me, the produc- tion of a sensation or of an image, is a mystery into which the human understanding cannot penetrate ; and materialism an hypothesis, so much the more conjectual, as philosophy can furnish no direct proof of the actual existence of matter. The naturalist, however, should examine what appear to be the material conditions of sensation, trace the ulterior operations of the mind, ascertain to what point they reach in each being, and assure himself whether they are not subject to conditions of perfection, dependent on the organization of each species, or on the momentary state of each individual body. To enable the me to perceive, there must be an uninter- rupted communication between the external sense and the central masses of the medullary system. It is then the modi- jfication only experienced by these masses that the me per- ceives : there may also be real sensations, without the exter- nal organ being affected, and which originate either in the nervous chain of communication, or in the central mass itself; such are dreams and visions, or certain accidental sensations. By central masses, we mean a part of the nervous system, that is so much the more circumscribed, as the animal is more perfect. In man, it consists exclusively of a limited portion of the brain j but in reptiles, it includes the brain and the whole of the medulla, and of each of their parts taken sepa- rately, so that the absence of the entire brain does not pre- vent sensation. In the inferior classes this extension is still greater. The perception acquired by the me, produces the image of the sensation experienced. We trace to without the cause of that sensation, and thus acquire the idea of the object that has produced it. By a necessary law of our intelligence, all ideas of material objects are in time and space. Vol. I. D 26 INTRODUCTION. The modifications experienced by the medullary masses leave impressions there which are reproduced, and thus re- cal to the mind images and ideas ; this is memory, a corporeal faculty that varies greatly, according to the age and health of the animal. Similar ideas, or such as have been acquired at the same time, recal each other ; this is the association of ideas. The order, extent and quickness of this association constitute the perfection of memory. Every object presents itself to the memory with all its quali- ties or with all its accessary ideas. Intelligence has the power of separating these accessary ideas of objects, and of combining those that are alike in several different objects under a general idea; the object of which no where really exists, nor presents itself per se this is abstraction. Every sensation being more or less agreeable or disagree- able, experience and repeated essays soon show what move- ments are required to procure the one and avoid the other; and with respect to this, the intelligence abstracts itself from the general rules to direct the will. An agreeable sensation being liable to consequences that are not so, and vice versa, the subsequent sensations become asso- ciated with the idea of the primitive one, and modify the general rules framed by intelligence this is prudence. From the application of these rules to general ideas, result certain formulae, which are afterwards easily adapted to par- ticular cases this is called reasoning. A lively remembrance of primitive and associated sensations, and of the impressions of pleasure or pain that belong to them, constitutes imagination. One privileged being, man, has the faculty of associating his general ideas with particular images more or less arbitrary, easily impressed upon the memory, and which serve to recal the general ideas they represent. These associated images are styled signs; their assemblage is a language. When the language is composed of images that relate to the sense of hearing or of sounds^ it is termed speech, and when relative INTRODUCTION. 27 to tliat of sights hieroglyphics. JVriting is a suite of images that relates to the sense of sight, by which we represent the elementary sounds ; and by combining them, all the images relative to the sense of hearing of which speech is composed ; it is therefore only a mediate representation of ideas. This faculty of representing general ideas by particular signs or images associated with them, enables us to retain dis- tinctly, and to remember without embarrassment, an im- mense number; and furnishes to the reasoning faculty and the imagination innumerable materials, and to individuals means of communication, which cause the whole species to participate in the experience of each individual, so that no bounds seem to be placed to the acquisition of knowledge ; it is the distinguishing character of human intelligence. Although, with respect to the intellectual faculties, the most perfect animals are infinitely beneath man ; it is certain that their intelligence performs operations of the same kind. They move in consequence of sensations received, are susceptible of durable aflections, and acquire by experience a certain know- ledge of things, by which they are governed independently of actual pain or pleasure, and by the simple foresight of conse- quences. When domesticated, they feel their subordination, know that the being who punishes them may refrain from so doing if he will, and when sensible of having done wrong, or behold him angry, they assume a suppliant and deprecating air. In the society of man they become either corrupted or improved, and are susceptible of emulation and jealousy : they have among themselves a natural language, which, it is true, is merely the expression of their momentary sensations, but man teaches them to understand another, much more compli- cated, by which he makes known to them his will, and causes them to execute it. To sum up all, we perceive in the higher animals a certain degree of reason, with all its consequences, good and bad, and which appears \p be about the same as that of children ere they have learned to speak. The lower we descend from man the weaker these faculties become, and at the bottom of the scale we find them reduced to signs (at times equivocal) of sensibi- 28 INTRODUCTION. lity, tliat is, to some few slight movements to escape from pain. Between these two extremes, the degrees are infinite. In a great number of animals, however, there exists another kind of intelligence, called instinct. This induces them to certain actions necessary to the preservation of the species, but very often altogether foreign to the apparent wants of the individual ; often also very complicated, and which, if attri- buted to intelligence, would suppose a foresight and know- ledge in the species that perform them infinitely superior to what can possibly be granted. These actions, the result of instinct, are not the effect of imitation, for very frequently the individuals who execute them have never seen them perform- ed by others : they are not proportioned to ordinary intelli- gence, but become more singular, more wise, more disinterest- ed, in proportion as the animals belong to less elevated classes, and in all the rest of their actions are more dull and stupid. They are so entirely the property, of the species, that all its individuals perform them in the same way without ever im- proving them a particle. The working bees, for instance, have always constructed very ingenious edifices, agreeably to the rules of the highest geometry, and destined to lodge and nourish a posterity not even their own. The solitary bee, and the wasp also, form highly complicated nests, in which to deposit their eggs. From this egg comes a worm, which has never seen its parent, which is ignorant of the structure of the prison in which it is confined, but which, once metamorphosed, constructs another precisely similar. The only method of obtaining a clear idea of instinct, is by admitting the existence of iimate and perpetual images or sensations in the sensorium which cause the animal to act in the same way as ordinary or accidental sensations usually do. It is a kind of perpetual vision or dream that always pursues it, and it may be considered, in all that has relation to its in- stinct, as a kind of somnambulism. Instinct has been granted to animals as a supplement to in- telligence, to concur with it, and with strength and fecundity, in the preservation, to a proper degree, of each species. INTRODUCTION. 29 There is no visible mark of instinct in the conformation of the animal, but, as well as it can be ascertained, the intelligence is always in proportion to the relative size of the brain, and particularly of its hemispheres. Of Method, as applied to the Animal Kingdom. From what has been stated with respect to methods in ge- neral, we have now to ascertain what are the essential charac- ters in animals, on which their primary divisions are to be founded. It is evident they should be those which are drawn from the animal functions, that is from the sensations, and mo- tions; for both these not only make the being an animal, but in a manner establish its degree of animality. Observation confirms this position by showing that their degrees of development and complication accord with those of the organs of the vegetative functions. The heart and the organs of the circulation form a kind of centre for the vegetative functions, as the brain and the trunk of the nervous system do for the animal ones. Now we see these two systems become imperfect and disappear together. In the lowest class of animjils, where the nerves cease to be visible, the fibres are no longer distinct, and the organs of digestion are simple excavations in the honogeneous mass of the body. In insects the vascular system even disappears before the nervous one; but, in general, the dispersion of the medullary masses accompanies that of the muscular agents : a spinal marrow, on which the knots or ganglions represent so many brains, corresponds to a body divided into numerous rings, supported by pairs of limbs longitudinally distributed, &c. This correspondence of general forms, which results from the arrangement of the organs of motion, the distribution of the nervous masses, and the energy of the circulating system, should then bei the basis of the primary divisions of the animal kingdom. We will afterwards ascertain, in each of these divisions, what characters should succeed immediately to those, and form the basis of the primary subdivisions. 30 INTRODUCTION. General distribution of the Animal Kingdom into Four Great Divisions. Ifj divesting ourselves of the prejudices founded on the divisions formerly admitted, we consider only the organization and nature of animals, without regard to their size, utility, the greater or less knowledge we have of them, and other ac- cessary circumstances, we shall find there are four principal forms, four general plans, if it may be so expressed, on which all animals seem to have been modelled, and whose ulterior divisions, whatever be the titles with which naturalists have decorated them, are merely slight modifications, founded on the development or addition of certain parts, which produce no essential change in the plan itself. In the first of these forms, which is that of man, and of the animals most nearly resembling him, the brain and principal trunk of the nervous system are enclosed in a bony envelope, formed by the cranium and vertebrse ; to the sides of this in- termedial column are attached the ribs, and bones of the limbs, which form the frame work of the body; the muscles generally cover the bones, whose motions they occasion, while the viscera are contained within the head and trunk. Ani- mals of this form we shall denominate Animalia Vertebrata. They have, all, red blood, a muscular heart, a mouth fur- nished with two jaws situated either above or before each other, distinct organs of sight, hearing, smell and taste placed in the cavities of the face, never more than four limbs, the sexes always separated, and a very similar distribution of the medullary masses and the principal branches of the nervous system. By a closer examination of each of the parts of this great series of animals, we always discover some analogy, even in species the most remote from each other; and may trace the gradations of one same plan from man to the last of the fishes. In the second form there is no skeleton ; the muscles are INTRODUCTION. 31 merely attached to the skin, which constitutes a soft contrac- tile envelope, in which, in many species, are formed stony plates, called shells, whose position and production are ana- logous to those of the mucous body. The nervous system is contained within this general envelope along with the viscera, and is composed of several scattered masses connected by ner- vous filaments; the chief of these masses is placed on the oesophagus, and is called the brain. Of the four senses, the organs of two only are observable, those of taste and sight, the latter of which are even frequently wanting. One single family alone presents organs of hearing. There is always, however, a complete system of circulation, and particular or- gans for respiration. Those of digestion and secretion are nearly as complex as in the vertebrata. We will distinguish the animals of this second form by the appellation of Animalia Mollusca. Although, as respects the external configuration of the parts, the general plan of their organization is not as uniform as that of the vertebrata j there is always an equal degree of resemblance between them in the structure and the functions. The third form is that remarked in worms, insects, &c. Their nervous system consists of two long cords, running lon- gitudinally through the abdomen, dilated at intervals into knots or ganglions. The first of these knots, placed over the oesophagus, and called brain, is scarcely any larger than those that are along the abdomen, with which they communicate by filaments that encircle the oesophagus like a necklace. The covering or envelope of the body is divided by transverse folds into a certain number of rings, whose teguments are sometimes soft, and sometimes hard; the muscles, however, being always situated internally. Articulated limbs are fre- quently attached to the trunk ; but very often there are none. We will call t^hese animals Animalia Articulately Or articulated animals, in which is observed the transition 32 INTRODUCTION. from the circulation in closed vessels to nutrition by imbibi- tioHj and the corresponding one of respiration in circumscribed organs^ to that effected by tracheae or air-vessels distributed throughout the body. In them, the organs of taste and sight are the most distinct; one single family alone presenting that of hearing. Their jaws, when they have any, are always lateral. The fourth form, which embraces all those animals known by the name of zoophytes, may also properly be denominated Animalia Radiatay Or radiated animals. We have seen that the organs of sense and motion in all the preceding ones are symmetrically arranged on the two sides of an axis. There is a posterior and anterior dissimilar face. In this last division, they are disposed like rays round a centre ; and this is the case even when they consist of but two series, for then the two faces are similar. They approximate to the homogeneity of plants, having no very distinct nervous system or particular organs of sense ; in some of them, it is even difficult to discover a ves- tige of circulation j their respiratory organs are almost univer- sally seated on the surface of the body, the intestine in the greater number is a mere sac without issue, and the lowest of the series are nothing but a sort of homogeneous pulp, endow- ed with motion and sensibility.(l) (1) Before my time, modern naturalists divided all invertebrated animals Into two classes. Insects and Worms. I was the first who attacked this method ; and in a memoir read before the Society of Natural History of Paris on the 10th of May 1795, and printed in the Decade Thilosophique, I presented a new division, in which I marked the characters and limits of the Mollusca, Crustacea, Insects and Worms, Echinodermata and Zoophytes. In a memoir read before the Insti- tute on the 31st of December 1801, 1 ascertained the red-blooded worms or Anne- lides. And finally, in a memoir read before the Institute in July 1812, and printed in the Annales du Museum d'Histoire Naturelle, tome xix, I distributed these various classes in three divisions, each of which is analogous to a branch of the vertebrata. FIRST GREAT DIVISION OF THE ANIMAL KINGDOM. ANIMALIA VERTEBRATA. The bodies and limbs of vertebrated animals being sup- ported by a frame-work or skeleton composed of connected pieces that are movable upon each other, their motions are certain and vigorous. The solidity of this support enables them to attain considerable size, and it is among them that the largest animals are found. The great concentration of the nervous system, and the volume of its central portions, give energy and stability to their sentiments, whence result superior intelligence and per- fectibility. Their body always consists of a head, trunk and members. The head is formed by the cranium which contains the brain, and by the face which is composed of two jaws and of the receptacles of the senses. The trunk is supported by the spine and the ribs. The spine is formed of vertebrae, the first of which sup- ports the head, that move upon each other, and are perforated by an annular opening, forming together a canal, in which is lodged that medullary production from which arise the nerves, called the spinaj marrow. The spine, most commonly, is continued into a tail, extend- ing beyond the posterior members. The ribs are a kind of semicircular hoops which protect Vol. I.E 34 ANIMALIA VERTEBRATA. the sides of the cavity of the trunk; they are articulated at one extremity with the vertebrae, and most generally at the other with the sternum; sometimes, however, they do not encircle the trunk, and there are genera in which they are hardly visible. There are never more than two pairs of members, but some- times one or the other is wanting, or even both. Their forms vary according to the movements they have to execute. The superior members are converted into hands, feet, wings or fins, and the inferior into feet or fins. The blood is always red, and appears to be so composed as to sustain a peculiar energy of sentiment and muscular strength, but in various degrees, corresponding to their quality of re- spiration : from which originates the subdivision of the verte- brata into four classes. The external senses are always five in number, and reside in two eyes, two ears, two nostrils, the teguments of the tongue, and those of the body, generally. In some species, however, the eyes are obliterated. The nerves reach the medulla through the foramina of the vertebrae or those of the cranium ; they all seem to unite with this medulla, which, after crossing its filaments, spreads out to form the various lobes of which the brain is composed, and terminates in the two medullary arches called hemispheres, whose volume is in proportion to the extent of the intelligence. There are always two jaws, the greatest motion is in the lower one, which rises and falls; the upper jaw is sometimes immovable. Both of these are almost always armed with teeth, excrescences of a peculiar nature, which in their chemi- cal composition are very similar to that of bone, but which grow by layers and transudation ; one whole class, however, that of birds, has the jaws invested with horn, and the genus Testudo, in the class of reptiles, is in the same case. The intestinal canal traverses the body from the mouth to the anus, experiencing various enlargements and contractions, having appendages and receiving solvent fluids, one of which, the saliva, is discharged into the mouth. The others, which are poured into the intestine only, have various names : the ANIMALIA VERTEBRATA. 35 two principal ones are the juices of the gland called the pan- creas, and bile^ a product of another very large gland named the liver. While the digested aliment is traversing its canal, that por- tion of it which is fitted for nutrition, called the chyle, is ab- sorbed by particular vessels styled lacteals, and carried into the veins ; the residue of the nourishment of the parts is also carried into the veins by vessels analogous to these lacteals, and forming with them one same system called the lymphatic system. The blood which has served to nourish the parts, and which has just been renewed by the chyle and lymph, is returned to the heart by the veins but this blood is obliged, either wholly or in part, to pass into the organ of respiration, in or- der to regain its arterial nature, previous to being again sent through the system by the arteries. In the three first classes this respiratory organ consists of lungs, that is, a collection of cells into which air penetrates. In fish only, and in some reptiles, while young, it consists of branchiae or a series of laminse, between which water passes. In all the vertebrata, the blood which furnishes the liver with the materials of the bile is venous bloody which has cir- culated partly in the parietes of the intestines, and partly in a peculiar body called the spleen, and which, after being united in a trunk called the vena porta, is again subdivided at the liver. All these animals have a particular secretion; the urine, which is produced in two large glands, attached to the sides of the spine of the back, called kidyieys the liquid they secrete is most commonly poured into a reservoir, named bladder. The sexes are separate, and the female has always one or two ovaries, from which the eggs are detached at the instant of conception. The male fecundifies them with the seminal fluid, but the mode varies greatly. In most of the genera of the three first classes, it requires an intromission of the fluid ; in some reptiles, and in most of the fishes, it takes place after the exit of the egg. 36 ANIMALIA VERTEBRATA. Subdivision of the Vertebrata into Four Classes. We have just seen how far vertebrated animals resemble each other; they present, however, four great subdivisions or classes, characterised by the kind or power of their motions, which depend themselves on the quantity of their respiration, inasmuch as it is from this respiration that the muscular fibres derive the strength of their irritability. The quantity of respiration depends upon two agents : the first is the relative amount of blood which is poured into the respiratory organ in a given instant of time ; the second is the relative amount of oxygen which enters into the composition of the surrounding fluid. The quantity of the former de- pends upon the disposition of the organs of circulation and respiration. The organs of the circulation may be double, so that all the blood which is brought back from the various parts of the body by the veins, is forced to circulate through the respi- ratory organ, previous to resuming its former course through the arteries; or they may be simple, so that a part only of the blood is obliged to pass through that organ, the remainder returning directly to the body. The latter is the case with reptiles. The quantity of their respiration, and all their qualities which depend on it, vary with the amount of blood thrown into the lungs at each pul- sation. Fishes have a double circulation, but their organ of respi- ration is formed to execute its function through the medium of water ; and their blood is only acted on by the portion of oxygen it contains, so that the quantity of their respiration is perhaps less than that of reptiles. In the mammalia the circulation is double, and the aerial respiration simple, that is, it is performed in the lungs only ; their quantity of respiration is, consequently, superior to that of reptiles, on account of the form of their respiratory organ, and to that of fishes from the nature of their surrounding ele- ment. ANIMALTA VERTEBRATA. 37 The quantity of respiration in birds is even superior to that of quadrupeds, not only because they have a double circula- tion and an aerial respiration, but also because they respire by many other cavities besides the lungs, the air penetrating throughout their bodies, and bathing the branches of the aorta, as well as those of the pulmonary artery. Hence result the four different kinds of motion for which the four classes of vertebrated animals are more particularly designed: quadrupeds , in which the quantity of respiration is moderate, are generally formed to walk and run, both motions being characterized by precision and vigour; birds^ which have more of it, possess the muscular strength and lightness requisite for flight ; reptiles, where it is diminished, are con- demned to creep, and many of them pass a portion of their lives in a kind of torpor ; fishes, in fine, to execute their mo- tions, require to be supported in a fluid whose specific gravity is nearly as great as their own. All the circumstances of organization peculiar to each of these four classes, and those especially which regard motion and the external sensations, have a necessary relation with these essential characters. The mammalia, however, have particular characters in their viviparous mode of generation, in the manner by which the fcetus is nourished in the uterus through the medium of the placenta, and in the mammae by which they suckle their young. The other classes, on the contrary, are oviparous, and if we compare them to the first, we shall find such numerous points of resemblance as announce a peculiar system of organization in the great general plan of the vertebrata. 38 ANIMALIA VERTEBRATA, CLASS I. MAMMALIA. The mammalia are placed at the head of the animal kingdom, not only because it is the class to which man himself belongs, but also because it is that which enjoys the most numerous faculties, the most delicate sensations, the most varied powers of motion, and in which all the different qualities seem com- bined in order to produce a more perfect degree of intelli- gence, the one most fertile in resources, most susceptible of perfection, and least the slave of instinct. As their quantity of respiration is moderate, they are de- signed in general for walking on the earth, but with vigorous and continued steps. The forms of the articulations of their skeleton, are, consequently, strictly defined, which deter- mines all their motions with the most rigorous precision. Some of them, however, by means of limbs considerably elongated, and extended membranes, raise themselves in the air 5 others have them so shortened, that they can move with facility in water only, though this does not deprive them of the general characters of the class. The upper jaw, in all of these animals, is fixed to the cra- nium ; the lower is formed of two pieces only, articulated by a projecting condyle to a fixed temporal bone; the neck con- sists of seven vertebrse, one single species excepted which has nine ; the anterior ribs are attached before, by cartilage, to a sternum consisting of several vertical pieces; their anterior extremity commences in a shoulder-blade, that is not articu- lated, but simply suspended in the flesh, often resting on the sternum by means of an intermediate bone, called a clavicle. > MAMMALIA. 39 This extremity is continued by an arm, a fore-arraj and a hand, the latter being composed of two ranges of small bones called the carpus, of another range called the metacarpus, and of the fingers, each of which consists of two or three bones, termed phalanges. With the exception of the cetacea, the first part of the pos- terior extremity, in all animals of this class, is fixed to the spine, forming a girdle or pelvis, which, in youth, consists of three pairs of bones, the ilium which is attached to the spine, the pubis which forms the anterior part of the girdle, and the ischium, the posterior. At the point of union of these three bones is situated the cavity with which the thigh is articulated, to which, in its turn, is attached the leg, formed of two bones, the tibia and fibula; this extremity is terminated by parts similar to those of the hand, i. e. by a tarsus, metatarsus and toes. The head of the mammalia is always articulated by two con- dyles, with the atlas, the first vertebra of the neck. The brain is always composed of two hemispheres, united by a medullary layer, called the corpus callosum, containing the ventricles, and enveloping four pairs of tubercles, named the corpora striata, or striated bodies, the thalami nervorum op- ticorum, or beds of the optic nerves, and the nates and testes. Between the optic beds is a third ventricle, which communi- cates with a fourth under the cerebellum, the crura of which always form a transverse prominence under the medulla ob- longata, called the yjons Varolii, or bridge ofVarolius. The eye, invariably lodged in its orbit, is protected by two lids and a vestige of a third, and has its crystalline fixed by the ciliary processes its sclerotic is simply cellular. The ear always contains a cavity called the tympanum, or drum, which communicates with the mouth by the Eustachian tube; the cavity itself is closed externally by a membrane call- ed the membrana tympani, and contains a chain of four little bones, named the iyicus or anvil, malleus or hammer, the os orbiculare or circular bone, and the stapes or stirrup ; a ves- tibule, on the entrance of which rests the stapes, and which communicates with three semicircular canals j and, finally, a 40 MAMMALIA. cochlea, which terminates by one canal in the vestibule, and by the other in the tympanum. Their cranium is subdivided into three portions; the ante- rior is formed by the two frontal and ethmoidal bones, the middle by the two ossa parietalia and the os ethmoides, and the posterior by the os occipitis. Between the ossa parietalia, the sphenoidalis and the os occipitis, are interposed the two temporal bones, part of which belong properly to the face. In the foetus, the occipital bone is divided into four parts : the sphenoidal into two halves, which are again subdivided into three pairs of lateral wings ; the temporal into three, one of which serves to complete the cranium, the second to close the labyrinth of the ear, the third to form the parifetes of the tympanum, &c. These bony portions, still more numerous in the earliest period of the foetal existence, are united more or less promptly, according to the species, and the bones them- selves finally become consolidated in the adult. Their face consists of the two maxillary bones, between which pass the nostrils ; the two intermaxillaries are situated before, and the two ossa palati behind them ; between these descends the vomer, a bony process of the os ethmoides ; at the entrance of the nasal canal are placed the ossa nasi ; to its external parietes adhere the inferior turbinated bones, the superior ones which occupy its upper and posterior portion belonging to the os ethmoides. The jugal or cheek bone unites the maxillary to the temporal bone on each side, and frequently to the os frontis ; finally, the os unguis, and pars plana of the ethmoid bone occupy the internal angle of the orbit, and sometimes a part of the cheek. In the embryo state these bones also are much more subdivided. Their tongue is always fleshy, connected with a bone called the hyoides, which is composed of several pieces, and sus- pended from the cranium by ligaments. Their lungs, two in number, divided into lobes, and com- posed of an infinitude of cells, are always enclosed, without any adhesion, in a cavity formed by the ribs and diaphragm and lined by the pleura; the organ of voice is always at the MAMMALIA. 41 upper extremity of the trachea ; a fleshy curtain, called the