a aE. Aen “We? nee Faas 4 fae ie. csmtelere ME ania gclee See Sal ite it” mh i : : [ Ome hy heed ey i nt i , yy Hh H | i : j re} Ne ao SS nat 4 it i 10 q q ab 4 i Th 4 f T ' wi pat P Mi i 1 ff | . be @ f fim ; eee: ii! oy i oat Se “ity Z ,; 4 COL p Ne CUE iyAeLAeny athe al ; : . nt ‘ae iA ie 4%, ant ue Li eds i olf abil f ik ) THE ANIMAL KINGDOM, Arranged after its Organijatinn, FORMING A NATURAL HISTORY OF ANIMALS, AND AN INTRODUCTION TO COMPARATIVE ANATOMY. BY THE LATE BARON GEORGES CUVIER, COUNCILLOR OF FRANCE, AND MINISTER OF PUBLIC INSTRUCTION, TRANSLATED AND ADAPTED TO THE PRESENT STATE OF SCIENCE. THE MAMMALIA, BIRDS, AND REPTILES, THE MOLLUSCOUS ANIMALS, BY EDWABD BLYTH. BY GEORGE JOHNSTON, M.D. THE FISHES AND RADIATA, THE ARTICULATED ANIMALS, BY ROBERT MUDIE. BY J. 0. WESTWOOD, F.L.S. A NEW EDITION, WITH ADDITIONS BY W. B. CARPENTER, M.D., F.R.S., AND J. 0. WESTWOOD, F.L.S. Eliustratey bo Three Hundred Engravings on ood and Thirty-four on Steel. LONDON: WM. S. ORR AND C©O., AMEN CORNER, PATERNOSTER ROW. MDCCCXLIX. G. BEARD, PRINTER; 5, GREYSTOKE-PLACE, FETTER’-LANE, HOLBORN: PREFACE. PERHAPS no book was ever so soon, so generally, and with so little envy, admitted to take its place at the head of that department of knowledge to which it belongs, as the Reane Animat of the illustrious Baron Cuvier. This is a high, but a just tribute, both to the work and the author ; for it at once showed that the former is what had long been required, and that the latter was as much beloved for the kindness and urbanity of his manners, as he was admired for the comprehensive range and unprecedented accuracy of his views. ; It must, indeed, be admitted, that, until Cuvier’s great work made its appearance, we had no modern systematic arrangement of animals which applied equally to all the Classes, Orders, and Families ;—which brought the extinct species into their proper situations in the living catalogue, and enabled every discoverer of a new animal, or part of an animal, instantly to connect it with its proper tribe or family. Important, however, as are the labours of this great naturalist, they could not possibly extend beyond the limits of what was known; and as Cuvier was no speculative theorist, but a rigid adherent to nature and fact, he kept his system considerably within the limits of those who were more speculative, and consequently less accurate. For students, no work is equal to that of Cuvier, for it is at once compre- hensive and concise ; and though the student may choose a particular de- partment, and require books more in detail with reference to that department, he must still have the Recnz AnrMaAt to point out to him the general analo- gies of the living creation. The present work is a complete Cuvier, as re- gards the essential part of the arrangement; and it is not a mere translation, but in some respects a new book, embodying the original one. ‘Throughout the whole of it, there will be found original remarks; but these are always distinguished from that which belongs to Cuvier, by being inclosed within brackets. This mode of arrangement was thought to be much better than | [Se eee eee PREFACE the appending of notes, which always divide the attention of the reader, and weaken the interest of the subject. Many of the classes and orders have been reinvestigated, and many new species added. ‘This is most extensively done in the departments which were intrusted to Mr. Biyru and Mr. Wusr- woop; but it runs more or less throughout the whole; and the publishers flatter themselves that this will be of great service to all students of this highly interesting branch of knowledge. ‘The different sizes of type, which bear some proportion to the comparative importance of the subject, will enable the reader to glean an outline of the system ;—to obtain something more than a bare outline, he must read the entire work. To these remarks which were appended in 1846 to the first edition, the publishers may be permitted to add a few words respecting the present re- print. It was not considered desirable to disturb the illustrious author’s arrangement by the introduction of a more modern system, nor was it thought proper to overlook altogether, in a work professing to give a com- plete view of Animated Nature, the results of modern investigation. The publishers have, therefore, added supplementary articles to such branches as seemed to require it; Dr. Carprenrer kindly supplying what was wanting to the Mollusca and Fishes, and Mr. Wesrwoop performing the same to his own department of the work. In addition to these improvements, the work is now illustrated by thirty plates of Animals, etched by Mr. THomas LanpsExEr, and four plates re- presenting the different races of Mankind; and the publishers present it in its present form in the belief that it will merit public approbation. AMEN CORNER, PATERNOSTER Row. ee $$$ sheer fetter TABLE OF CONTENTS. PREFACE TO THE FIRST EDITION . ADVERTISEMENT TO THE SECOND EDITION ; : . INTRODUCTION Of Natural History, and of Systema pene: rally Of living Beings, and of Organization in general = Division of Organized Beings into ‘Animal and Vegetable Of the Forms peculiar to the Organic Ele- ments of the Animal Body, and of the principal Combinations of its Chemical Elements Of the Forces which act in thie inecanad Body Summary idea of the Functions and Organs of the Bodies of Animals, and of their various degrees of complication 5 Of the Intellectual Functions of Animals Of Method, as applied to the Animal King- dom 6 A General Distribution of the Animal King- dom into four great Divisions—Vertebrate Animals, Molluscous Animals, Articulate Animals, Radiate Animals 5 VERTEBRATE ANIMALS Subdivision into four Classes MAMMALIA . Division into Orders BIMANA, or MAN Peculiar Conformation of Man : Physical and Moral ean of Man : Varieties of the Biuman Species | QUADRUMANA Monkey-like Animals Monkeys of America : CARNARIA ¢ ‘ . C Cheiroptera Insectivora Carnivora MARSUPIATA RODENTIA EDENTATA Ordinary Edentata Monotremata PACHYDERMATA Proboscidea 5 Ordinary Pachydermata Solidungula é A RUMINANTIA Without horns ; a . With horns : A . CETACEA Herbivora , ; = Ordinaria 3 > ANALOGIES OF THE Teer OF Me MALIA OVIPAROUS VERTEBRATES IN GENE- RAL AVES 6 Division into Griecs ACCIPITRES O Diurnal Birds of Prey Nocturnal Birds of Prey PASSERINE Dentirostres Fissirostres Conirostres Tenuirostres : Syndactyli X é ScANSORES AFFINITIES OF THE THREE PRECEDING ORDERS C ° : Q GALLINE GRALLZ 5 é . Brevipennes : ° : Pressirostres Cultrirostres Longirostres : Macrodactyli PALMIPEDES 4 5 Brachypteres A : Longipennes > < = Totipalmati 4 5 A Lamellirostres z ‘ REPTILIA : n : CHELONIA SAURIA ° The Crocodiles The Lizards The Iguanas The Geckotians : The Chameleons a The Scindoidiens OPHIDIA The Orvets The True Serpents The Naked Serpents BATRACHIA . Page 134 135 136 144 145 145 150 153 154 162 163 163 172 177 178 194 196 206 209 211 220 223 231 232 234 237 242 247 251 251 255 259 261 267 269 272 272 274 275 277 278 278 280 280 280 285 285 vi TABLE OF CONTENTS. Page PISCES = . : 3 c 289 ACANTHOPTERYGII : 6 292 Percide & c 293 Fishes with hard checest . 6 294 Scienide 5 A : - 295 Sparide - . : 296 Menidez A 5 A é 296 Squamipennes : F é 296 Scomberidz 4 4 ; F 298 Tenide . A - 302 Theutyes . . 303 Labyrinthiform Pharyngeals : : 303 Mugilide : . 5 304 Gobiode : 3 3 5 305 Pectorales pedunculati ° C 308 Labride . 4 5 . C 309 Fistularide : * 5 311 MALACOPTERYGII ABDOMINATES : 312 Cyprinide : . - : 313 Esocide . Z : : : 314 Siluride . . . C F 316 Salmonide c ; : : 318 Clupeide 0 6 0 320 MALACOPTERYGII SUBBRACHIATI ¢ 321 Gadide . A C : 5 322 Pleuronectide . ; c 4 323 Discoboli . : c 3 324 MALACOPTERYGIi APODA : < 325 LOPHOBRANCHII . ; : iS 326 PLECTOGNATHI - 5 c A 327 Gymnodontes 6 5 0 6 327 Sclerodermi 5 5 328 CHONDROPTERYGII BAN GETe sents 330 CHONDROPTERYGII BRANCHIIS FIXIs 331 Selachii . f 5 : 4 331 Cyclostomata : : . . 333 MOLLUSCA é 6 5 : $ 335 Division into Classes . 5 ; : 337 CEPHALOPODES . : > : 337 PTEROPODES : c 3 . 343 GASTEROPODES . - A : 344 PULMONEA 5 5 5 A 347 NUDIBRANCHIATA : 5 351 INFEROBRANCHIATA 5 3 353 TECTIBRANCHIATA Q 6 5 353 HETEROPODA : ' O : 356 PECTINIBRANCHIATA 5 A cC 357 Trochoides . 5 A C 358 Capuloides ° Cc 5 361 Buccinoides ; A . ; 362 TUPULIBRANCHIATA ° c : 367 ScuTIBRANCHIATA 0 . 5 368 CyYCLOBRANCHIATA ; O 369 ACEPHALES S 6 ° C 369 ACEPHALA TESTACEA s : : 370 The Oysters : 5 “ c 371 Mytilacee ° . ° : 375 Camacea . c 0 C : 376 Cardiacea é é . g 377 Inclusa : ; : : 379 ACEPHALA NUDA : 5 382 Segregata . : 5 : 382 Aggregata . . : 383 BRACHIOPODES . 5 ; 384 CIRRHOPODES ; ; F ; 385 ARTICULATED ANIMALS 5 i 387 Division into Classes 5 a 5 388 ANNELIDES ‘ . zi 5 389 Division into Orders 5 . . 389 TUBICOLR 5 ° 5 5 391 DoRSIBRANCHIATA Abranchia Setigera Asetigera ARTICULATED ANIMALS | WITH ARTICU- LATED FEET Introduction, by Latreille Divided into Classes . CRUSTACEA MALACOSTRACA A. Eyes placed on a footstalk DECAPODA 2 Brachyura Macrura STOMAPODA S Unipeltata ‘5 . Bipeltata B. Eyes sessile and Ten Oy eats AMPHIPODA LZ=MODIPODA TsoPpOoDA CRUSTACEA ENTOMOSTRACA BRANCHIOPODA Lophyropa Phyllopa Peecilopoda Xyphosura Siphonostoma TRILOBITES ARACHNIDA PULMONARIA The Spiders . The Pedipalpi : ° TRACHEARIZ c The Pseudo-Scorpiones The Pycnogonides The Holetra INSECTA C ; MyYRIAPODA e 5 Chilognatha 2 . Chilopoda < . THYSANOURA : ° Lepismene fs ° Podurelle PARASITA : 5 SucTORIA : c COLEOPTERA PENTAMERA Carnivora C Brachelytra Serricornes Clavicornes Palpicornes Lamellicornes HETEROMERA Melasoma : = Taxicornes 5 Stenelytra 5 : Trachelides TETRAMERA The Weevils Xylophagi Platysoma Longicornes Eupoda Cyclica Clavipalpi TRIMERA Fungicole Aphidiphagi Pselaphi ORTHOPTERA 5 . Cursoria Saltatoria , 5 HEMIPTERA ; 5 5 HETEROPTERA Geocorise Hydrocorise HoMOPTERA Cicadarie Aphidii Gallinsecta NEUROPTERA Subulicornes Planipennes Plicipennes . C HYMENOPTERA : : TEREBRANTIA : 5 Securifera : : : Pupivora : . . ACULEATA 5 : C Heterogyna : . Fossores : 6 o Diploptera é - ° Mellifera : 6 C LEPIDOPTERA Diurna C c : Crepuscularia ; 5 ° Nocturna RHIPIPTERA DIPTERA Nemocera - Tanystoma ¢ Page PISCES.—Professors Agassiz and Miiller’s Clas- sification of Fishes GANOIDEANS . - PLACOIDEANS . CTENOIDEANS . CYCLOIDEANS . MOLLUSCA CEPHALOPODA TUNICATA CRUSTACEA TABLE OF CONTENTS. Page 556 Tabanides 557 Notacantha 560 Athericera 562 Pupipara 563 RADIATA : : 563 ECHINODERMATA 566 PEDICELLATA 567 Asterias 567 Echinus 570 Holothuria 572 APODA 573 ENTOZOA 574 NEMATOIDEA 577 PARENCHYMATA 580 Acanthocephala 581 | Tremadotea 582 Tenioidea 582 Cestoidea 585 ACALEPHA 591 SIMPLICIA 2 591 Hydrostatica : 593 POLYPI 596 CARNOSI 598 GELATINOSI 603 COoRALLIFERI 605 Tubularia 608 Cellularia 609 Corticati 614 INFUSORIA 615 ROTIFERA 617 HoMOGENEA 621 APPENDIX. ARACHNIDA 661 | INSECTA 661 | RADIATA 66L ECHINODERMATA 661 ACALEPH& 661 BRYOZOA 665 ANTHOZOA 667 INFUSIORIA 669 HOMOGENEA 673 vii Page 674 675 691 691 695 698 700 705 707 6 : ; ; = t 7 - = » a ? j i 7 - a —— « = ‘ = : i : 2 — 2 : F< @ + ~~ - - - ‘ : ae $- = = “ A . o $ x i : i. : : : —* a 7 ps af = 2 > a ‘ - z ‘ fi ‘ y 3 ’ . : : & : 7 = i ; ry \ ws 5 = : . 7 5 7 . Li 1 . — . . = 7 , ot - - - — — = = — - , , - re ‘ ‘ ‘ - , PORTRAIT OF CUVIER—Vignette. Plate I. — GIRAFFE . II. — CAUCASIAN RACE III. — MONGOLIAN RACE Iv. — AMERICAN RACE Vv. — NEGRO RACE . VI. — MONKEYS Vu. — BABOONS. . VIII. — LEMURS . IX. — BEARS . . X.— DOGS . . XI. — ICHNEUMONS ° XII. — CATS LIST OF PLATES. XIII. — AMPHIBIOUS ANIMALS XIV. — HIPPOPOTAMUS XV. — RHINOCEROS XVI. — HORSES XVII. — CAMELS . XVIII. — DEER . Frontispiece. Page 49 50 51 52 57 59 63 . 83 90 . 93 95 . 98 130 . 131 133 . 135 Plate. XIX. XX. XXI. XXII. XXIII. XXIV. XXV. XXVI. XXVII. XXVIII. XXIX. XXX. XXXI. XXXII. XXXII. — ANTELOPES — GOATS — SHEEP — BRAHMIN BULL — VULTURES — EAGLES — OWLS — HUMMING BIRDS — PARROTS — OSTRICH — DUCKS — REPTILES — BEETLES . — ORTHOPTEROUS — BUTTERFLIES © LIST OF PLATES. INSECTS Amel Mio Ao TL ok tdeNe Gi) c@» Mi. PREFACE TO THE FIRST EDITION. Havine been devoted, from my earliest youth, to the study of comparative anatomy, that is to say of the laws of the organization of animals, and of the modifications which this organization undergoes in the various species, and having, for nearly thirty years past, 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 propositions that should contain their most simple expression. My first essays soon led me to perceive that I could only attain this object in proportion as the animals, whose structure I should have to elucidate, were arranged in conformity with that structure, so that under one single name, of class, order, genus, &c., might be embraced all those species which, in their internal as well as exterior conformation, present accordancies either more general or more particular. Now this is what the greater number of naturalists of that epoch had never sought to effect, and what but few of them could have achieved, even had they been willing to try; since a parallel arrangement presup- poses a very extensive knowledge of the structures, of which it ought, in some measure, to be the representation. It is true that Daubenton and Camper had supplied facts,—that Pallas had indicated views ; but the ideas of these well-informed men had not yet exercised upon their contemporaries the influence which they merited. The only general catalogue of animals then in existence, and the only one we possess even now,—the system of Linnxus,—had just been disfigured by an unfortunate editor, who did not so much as take the trouble to comprehend the principles of that ingenious classifier, and who, wherever he found any disorder, seems to have tried to render it more inextricable. It is also true that there were very extensive works upon particular classes, which had made known a vast number of new species; but their authors barely con- sidered the external relations of those species, and no one had employed himself in co-arranging the classes and orders according to their entire structure: the cha- racters of several classes remained false or incomplete, even in justly celebrated anatomical works; some of the orders were arbitrary; and in scarcely any of these divisions were the genera approximated conformably to nature. bo PREFACE TO THE FIRST EDITION I was necessitated then,— and the task occupied considerable time,— I was com- pelled to make anatomy and zoology, dissection and classification, proceed beforehand ; to seek, in my first remarks on organization, for better principles of distribution ; to employ these, in order to arrive at new remarks ; and in their turn the latter, to carry the principles of distribution to perfection: in fine, to elicit from the mutual reaction of the two sciences upon each other, a system of zoology adapted to serve as an introduction and a guide in anatomical researches, and 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 the division of these into sub-genera, formed the object of my Tableau Elémentaire des Animauz, printed in 1798, and I improved this work, with the assistance of M. Dumeril, in the tables annexed to the first volume of my Lecons d’ Anatomie Comparée, 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 want of critical precision had left a vast number of species, and even many genera. Not only were the classes and orders not sufficiently conformed to the intrinsical nature of animals, to serve conveniently as the basis to a treatise on comparative anatomy, but the genera themselves, though ordinarily better constituted, offered but inadequate resources in their nomenclature, on account of the species not having been arranged under each of them, conformably to their characters. ‘Thus, in placing the Manati in the genus Morse, the Siren in that of the Eels, Gmelin had rendered any general proposition rejative to the organization of these genera impossible ; just as by approximating in the same class and in the same order, and placing side by side, the Cuttle and the fresh-water Polypus, he had made it impossible to predicate anything generally of the class and order which comprised such incongruous beings. I select the above examples from among the most prominent; but there existed an infinitude of such mistakes, less obvious at the first glance, which occasioned incon- veniences not less real. It was not sufficient, then, to have imagined a new distribution of the classes and orders, and to have properly placed the genera; it was also necessary to examine all the species, in order to be assured that they really belonged to the genera in which they had been placed. Having come to this, I found not only species grouped or dispersed contrary to all rea- son, but I remarked that many had not been established in a positive manner, either by the characters which had been assigned to them, or by their figures and descriptions. Here one of them, by means of synonymes, represents several under a single name, and often so different that they should not rank in the same genus: there a single one is doubled, tripled, and successively reappears in several sub-genera, genera, and sometimes different orders. What can be said, for example, of the Trichechus manatus of Gmelin, which, under a single specific name, comprehends three species and two genera,—two genera differing in almost everything ¢ By what name shall we speak of the Velella, which figures DS <=) f ame’ PREFACE TO THE FIRST EDITION. 3 twice among the Meduse and once among the Holothurieé ? How are we to reassemble the Biphore, of which some are there called Dagysa, the greater number Salpa, while several are ranged among the Holothurie ? It did not therefore suffice, in order completely to attain the object aimed at, to review the species: it was necessary to examine their synonymes; or, in other words, to re-model the system of animals. Such an enterprize, from the prodigious developement of the science of late years, could not have been executed completely by any one individual, even granting him the longest life, and no other occupation. Had I been constrained to depend upon myself alone, I should not have been able to prepare even the simple sketch which 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, freely enjoying the use of the collections they had made, and having myself formed a very considerable one, ex- pressly appropriated to my object, a great part of my labour consisted merely in the employment of so many rich materials. It was not possible, for instance, that much remained for me to do on shells, studied by M. de Lamarck, nor on quadrupeds, described by M. Geoffroy. The numerous and new affinities described by M. de Lacepéde, were so many data for my system of fishes. M. Levaillant, among so many beautiful birds collected from all parts, perceived details of organization which I immediately adapted to my plan. My own researches, employed and fructified by other naturalists, yielded results to me which, in my hands alone, they would not all have produced. So, also, M. de Blainville and M. Oppel, in examining the cabinet which I had formed of anatomical preparations on which I designed to found my divisions of reptiles, anti- cipated—and perhaps better than I should have done—results of which as yet I had but a glimpse, &c., &c. Encouraged by these reflections, I determined to precede my Treatise on Com- parative Anatomy by a kind of abridged system of animals, in which I should present their divisions and subdivisions of all degrees, established in a parallel manner upon their structure, both internal and external ; where I would give the indication of well- authenticated species that belonged, with certainty, to each of the subdivisions ; and where, to create more interest, I would enter into some details upon such of the species as, from their abundance in our country, the services which they render us, the damage which they occasion to us, the singularity of their manners and economy, their extraordinary forms, their beauty, or their magnitude, are the most remarkable. I hoped by so doing to prove useful to young naturalists, who, for the most part, have but little idea of the confusion and errors of criticism in which the most accredited works abound, and who, particularly in foreign countries, do not sufficiently attend to the study of the true relations of the conformation of beings: I considered myself as rendering a more direct service to those anatomists, who require to know beforehand to which orders they should direct their researches, when they wish to solve by com- parative anatomy some problem of human anatomy or physiology, but whose ordinary occupations do not sufficiently prepare them for fulfilling this condition, which is essen- tial to their success. Nevertheless, I have not professed to extend this twofold view equally to all classes of the animal kingdom ; and the vertebrated animals, as in every sense the most in- Bio = ey ———— 4 PREFACE TO THE FIRST EDITION. teresting, claimed to have the preference. Among the Invertebrata, I have had more particularly to study the naked mollusks and the great zoophytes ; but the innumerable variations of the external forms of shells and corals, the microscopic animals, and the other families which perform a less obvious office in the economy of nature, or whose organization affords but little room for the exercise of the scalpel, did not require to be treated with the same detail. Independently of which, so far as the shells and corals are concerned, I could depend on a work just published by M. de Lamarck, in which will be found all that the most ardent desire for information can require. With respect to insects, so interesting by their external forms, their organization, habits, and by their influence on all living nature, I have had the good fortune to find as- sistance which, in rendering my work infinitely more perfect than it could have been had it emanated solely from my pen, has, at the same time, greatly accelerated its publica- tion. My colleague and friend, 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 innumerable genera which entomolo- gists are continually establishing. As for the rest, if in some instances I have given less extent to the exposition of sub-genera and species, this inequality has not occurred in aught that concerns the superior divisions and the indications of affinities, which I have every where founded on equally solid bases, established by equally assiduous researches. 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 less important parts, and have formed them into what I designate a sub-genus, Whenever it was possible, I have dissected at least one species of each sub-genus ; and if those be excepted to which the scalpel cannot be applied, there exists in my work but very few groups of this degree, of which I cannot produce some considerable portion of the organs. After having determined the names of the species which I had examined, and which had previously been either well figured or well described, I placed in the same sub- genera those which I had not seen, but whose exact figures, or descriptions, sufficiently precise to leave no doubt of their natural relations, I found in authors; but I have passed over in silence that great number of vague indications, on which, in my opinion, naturalists have been too eager to establish species, the adoption of which has mainly contributed to introduce into the catalogue of beings, that confusion which deprives it of so much of its utility. I could have added, almost every where, a vast number of new species; but as I could not refer to figures, it would have been incumbent on me to extend their descrip- tions beyond what space permitted: I have, therefore, preferred depriving my work of this ornament, and have only indicated those, the peculiar conformation of which gives rise to new sub-genera. My sub-genera once established on positive relations, and composed of well-authen- ticated species, it remained only to construct this great scaffolding of genera, tribes, families, orders, classes, and primary divisions, which constitute the entire animal kingdom. PREFACE TO THE FIRST EDITION. 5 In this I have proceeded, partly by ascending from the inferior to the superior divi- sions, by means of approximation and comparison ; and partly also by descending from the superior to the inferior groups, on the principle of the subordination of characters ; comparing carefully the results of the two methods, verifying one by the other, and always sedulously establishing the correspondence of external and internal structure, which, the one as well as the other, are integral parts of the essence of each animal. Such has been my procedure whenever it was necessary and possible to introduce new arrangements ; but I need not observe that, in very many places, the results to which it would have conducted me had already been so satisfactorily obtained, that I had only to follow the track of my predecessors. Notwithstanding which, even in those cases where no alteration was required, I have verified and confirmed, by new observations, what was previously acknowledged, and what I did not adont until it had been subjected to a rigorous scrutiny. The public may form some idea of this mode of examination, from the memoirs on the anatomy of mollusks, which have appeared in the Annales du Museum, and of which I am now preparing a separate and augmented collection. I venture to assure the reader that I have bestowed quite as extensive labour upon the vertebrated animals, the anne- lides, the zoophytes, and on many of the insects and crustaceans. I have not deemed it necessary to publish it with the same detail; but all my preparations are exposed in the Cabinet of Comparative Anatomy in the Jardin du Roi, and will serve hereafter for my treatise on anatomy. Another very considerable labour, but the details of which cannot be so readily authenticated, is the critical examination of ‘species. I have verified all the figures alleged by different authors, and as often as possible referred each to its true species, previously to selecting those which I have indicated: it is entirely from this verifica- tion, and never from the classification of preceding systematists, that I have referred to my sub-genera the species that belong to them. Such is the reason why no astonish- ment should be experienced on finding that such and such a genus of Gmelin is now divided, and distributed even in different classes and still higher divisions ; that nume- rous nominal species are reduced to a single one, and that popular names are very differently applied. There is not one of these changes which I am not prepared to justify, and of which the reader himself may not obtain the proof, by recurring to the sources which I have indicated. In order to lessen his trouble, I have been careful to select for each class a principal author, generally the richest in good original figures; and I quoted secondary works only where the former are deficient, or where it was useful to establish some com- parison, for the sake of confirming 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 expression. These I have obtained by graduated generalities. By never repeating for a species that which might be said of an entire sub-genus, nor for a genus what might be applied to a whole order, and so on, we arrive at the greatest economy of words. To this my endeavours have been, above all, particularly directed, inasmuch as it was the principal end of my work. It may be remarked, however, that I have not employed many technical terms, and that I have endeavoured to communicate my ideas without that barbarous array of fictitious words, which, in the works of so many modern naturalists, prove 6 PREFACE TO THE FIRST EDITION. so very repulsive. 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 have endeavoured, as far as possible, to preserve those of my predecessors; but the numerous sub-genera I have established required these denominations ; for in things so various, the memory is not satisfied with numerical indications. I have selected them, so as either to convey some character, or among the common names which I have latinized, or lastly, after the example of Linneus, from among 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 nevertheless recommend employing the sub- stantive of the genus, and the trivial name only. The names of the sub-genera are designed merely as a relief to the memory, when we would indicate these sub- divisions in particular. Otherwise, as the sub-genera, already very numerous, will in the end become greatly multiplied, in consequence of having substantives continually to retain, we shall be in danger of losing the advantages of that binary nomenclature so happily imagined by Linneeus. It is the better to preserve it that I have dismembered as little as possible the great genera of that illustrious reformer of science. Whenever the sub-genera into which I divide them were not to be translated into different families, I have left them together under their former generic appellation. This was not only due to the memory of Linnzeus, but was necessary in order to preserve the mutual intelligence of the naturalists of different countries. To facilitate still more the study of this work,—for it is to be studied more than to be glanced over,—I have employed different-sized types in the printing of it, to correspond to the different grades of generalization of the statements contained in it. * * * Thus the eye will distinguish beforehand the relative importance of each group, and the order of each successive idea ; and the printer will second the author with every con- trivance which his art supplies, that may conduce to assist the memory. The habit, necessarily acquired in the study of natural history, of mentally classify- ing a great number of ideas, is one of the advantages of this science, which is seldom spoken of, and which, when it shall have been generally introduced into the system of common education, will perhaps become the principal one: it exercises the student in that part of logic which is termed method, as the study of geometry does in that which is called syllogism, because natural history is the science which requires the most precise methods, as geometry is that which demands the most rigorous reason- ing. Now this art of method, when once well acquired, may be applied with infinite advantage to studies the most foreign to natural history. Every discussion which sup- poses a classification of facts, every research which requires a distribution of matters, is performed after the same manner; and he who had cultivated this science merely for amusement, 1s surprised at the facilities it affords for disentangling all kinds of affairs. It is not less useful in solitude. Sufficiently extens:ve to satisfy the most powerful mind, sufficiently various and interesting to calm the most agitated soul, it consoles the unhappy, and tends to allay enmity and hatred. Once elevated to the contem- plation of that harmony of Nature irresistibly regulated by Providence, how weak and ipennl ed) ae 2 ee SS PREFACE TO THE FIRST EDITION. 7 trivial appear those causes which it has been pleased to leave dependent on the will of man! How astonishing to behold so many fine minds, consuming themselves, so uselessly for their own happiness and that of others, in the pursuit of vain combina- tions, the very traces of which a few years suffice to obliterate ! I avow it proudly, these ideas have been always 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 contributed 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 obligation to those naturalists, whose works have furnished or suggested a part of them. To anticipate a remark which will naturally occur to many, I must observe that I have neither pretended nor desired to class animals so as to form a single line, or as to mark their relative superiority. I even consider every attempt of this kind im- practicable. Thus, I do not mean that the mammalia or birds which come last, are the most imperfect of their class; still less do I intend that the last of mammalia are more perfect than the first of birds, or the last of mollusks more perfect than the first of the annelides, or zoophytes ; even restricting the meaning of this vague word perfect to that of ‘most completely organized.” I regard 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 passage or gradation from one species into another, which cannot 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; and, in my opinion, it has proved more detrimental to the progress of natural history in modern times, than is easy to imagine. It is in conformity with these views, that I have established my four principal divisions, which have already been made known in a separate memoir. I still think that it expresses the real relations of animals more exactly than the old arrangement of Vertebrata and Invertebrata, for the simple reason, that the former animals have a much greater mutual resemblance than 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 Histoire Naturelle, had already discerned in part the basis of the division, and principally that which reposes on the nervous system. The particular approximation of oviparous Vertebrata, inter se, originated from the curious observations of M. Geoffroy on the composition of bony heads, and from those which I have added to them relative to the rest of the skeleton, and to the muscles. In the class of Mammalia, I have brought back the Solipedes to the Pachydermata, and have divided the latter into families on a new plan; the Ruminantia I have placed at the end of the quadrupeds; and the Manati near the Cetacea. ‘The distribution of the Carnaria I have somewhat altered; the Oustitis have been wholly separated from the Monkeys, and a sort of parallelism indicated between the Marsupiata and other digitated quadrupeds, the whole from my own anatomical researches. All that I have ——— at 8 PREFACE TO THE FIRST EDITION. given on the Quadrumana ana the Bats is based on the recent and profound labours of my friend and colleague M. Geoffroy de St. Hilaire. The researches of my brother, M. Frederic Cuvier, on the teeth of the Curnaria and Rodentia, have proved highly useful to me in forming the sub-genera of these two orders. Notwithstanding the genera of the late M. Illiger are but the results of these same studies, and of those of some foreign naturalists, I have adopted his names whenever his genera corresponded with my sub-genera. M. de Lacepéde has also discerned and indicated many excellent divisions of this degree, which I have been equally compelled to adopt; but the cha- racters of all the degrees and all the indications of species have been taken from nature, either in the Cabinet of Anatomy or in the galleries of the Museum. The same plan was pursued with respect to the Birds. I have examined with the closest attention more than four thousand individuals in the Museum ; I arranged them according 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 sub-divisions may bear to some recent descriptions, is on my part purely accidental.* Naturalists, I hope, will approve of the numerous sub-genera which I have deemed it necessary to make among the birds of prey, the Passerine, and the Shore-birds ; they appear to me to have completely elucidated genera hitherto involved in much confusion. I have marked, as exactly as I could, the accordance of these subdivisions with the genera of MM. de Lacepéde, Meyer, Wolf, Temminck, and Savigny, and have referred 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 are filled with so many interesting observations, together with M. Vieillot’s, have been of much assistance to me in designating the species which they represent. The general division of this class remains as | published it in 1798, in my Tableau Elémentaire.} I have thought proper to preserve for the Reptiles, the general division of my friend M. Brongniart ; but I have prosecuted very extensive anatomical investigations to arrive at the ulterior subdivisions. M. Oppel, as I have already stated, has partly taken advantage of these preparatory labours ; and whenever my genera finally agreed with 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 particular divisions which I have given in the genera of Monitors and Geckos, are the product of my own observations on a great number of Reptiles recently brought to the Museum by MM. Péron and Geoffroy. My labours on the Fishes will probably be found to exceed those which I have bestowed on the other vertebrated animals. Our Museum having received a vast number of Fishes since the celebrated work of M. de Lacepéde was published, I have been enabled to add many subdivisions to those of that learned naturalist, also to combine several species differently, and to multiply anatomical observations. I have also had * This observation not having been sufficiently understood abroad, 1816. Four volumes are not printed so quickly as a pamphlet of a few I am obliged to repeat it here, and openly to declare a fact witnessed pages. I say no more. (Note to Edit. 1829), by thousands in Paris; it is this, that all the birds in the gallery of } Lonly mention this because an estimable naturalist, M. Vieillot, the Museum were named and arranged according to my system, in | has, in a recent work, attributed to himself the union of the Pice and 1811. Those even of my subdivisions to which I had not yet given | Passeres. I had printed it in 1798, together with my other arrange- names, were marked by particular signs. This is my date. Inde- | ments, so as to render them public in the Museum since 1811] and 1813 pendeutly of this, my first volume was printed in the beginning of | PREFACE TO THE FIRST EDITION. 9 better means of verifying the species of Commerson, and of some of other travellers ; and, upon this point, 1am much indebted to a review of the drawings of Commerson, and of the dried fishes which he brought with him, by M. Dumeril, but which have only been very lately recovered ;—resources to which I have added those presented to me in the fishes brought by Péron from the Indian Ocean and Archipelago, those which I obtained in the Mediterranean, and the collections made on the coast of Coromandel by the late M. Sonnerat, at the Mauritius by M. Matthieu, in the Nile and Red Sea, by M. Geoffroy, &c. I was thus enabled to verify most of the species of Bloch, Russell, and others, and to prepare the skeletons and viscera of nearly all the sub-genera; so that this part of the work will, I presume, offer much that is new to Icthyologists. As to my division of this class, I confess its inconvenience, but I believe it, never- theless, to be more natural than any preceding one. In publishing it some time ago, I only offered it for what it is worth ; and if any one should discover a better principle of division, and as conformable to the organization, I shall hasten to adopt it. It is admitted 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 which I have devoted to the anatomy of mollusks in general, and principally to the naked mollusks, are well known. The determining of this class, as well as of its divisions and subdivisions, rests upon my own observations ; the magni- ficent work of M. Poli had alone anticipated me by descriptions and anatomical researches useful for my design, but confined to bivalves and multivalves only. I have verified all the facts furnished by that able anatomist, and I believe that I have more justly marked the functions of some organs. Ihave also endeavoured to determine the animals to which belong the principal forms of shells, and to arrange the latter from that consideration ; but with regard to the ulterior divisions of those shells of which the animals resemble each other, I have examined them only so far as to enable me to describe briefly those admitted by MM. de Lamarck and de Montfort ; even the small number of genera and sub-genera which are properly mine, are principally derived from observa- tions on the animals. In citing examples, I have confined myself to a certain number of the species of Martini, Chemnitz, Lister, and Soldani; and that only because, the volume in which M. Lamarck treats of this portion not having yet appeared, I was compelled to fix the attention of my readers on specific objects. But in the choice and determin- ing of these species, I lay no claim to the same critical accuracy which I have employed for the vertebrated animals and naked mollusks. The excellent observations of MM. Savigny, Lesueur, and Desmarest, on the com- pound Ascidians, approximate this latter family of mollusks to certain orders of zoophytes: this is a curious relation, and a further proof of the impracticability of arranging animals in a single line. I believe that I have extricated the Annclides,—the establishing of which, although not their name, belongs virtually to me,—from the confusion in which they had hitherto been involved, among the Mollusks, the Testacea, and the Zoophytes, and have placed them in their natural order; even their genera have received some elucidation only by my observations, published in the Dictionnaire des Sciences Naturelles, and else- where. Of the three classes contained in the third volume, I have nothing to remark. nanan Nee eee ee eee ee 10 ADVERTISEMENT TO THE SECOND EDITION. M. Latreille, who, with the exception of some anatomical details, founded on my own observations and those of M. Ramdohr, which I have inserted in his text, is its sole author, will take upon himself to explain all that is necessary. As to the Zoophytes, which terminate the Animal Kingdom, I have availed myself, for the Echinoderms, of the recent work of M. de Lamarck; and for the Intestinal Worms, of that of M. Rudolphi, intitled Hntozoa ; but I have anatomized all the genera, some of which have been determined by me only. There is an excellent work by M. Tiédemann, on the anatomy of the Echinoderms, which received the prize of the Institute some years ago, and will shortly appear ; it will leave nothing to be desired respecting these curious animals. The Corals and the Infusoria, offering no field for anatomical investigations*, will be briefly disposed of. The new work of M. de Lamarck will supply my deficiencies.t With respect to authors, I can only here mention those who have furnished me with general views, or who were the origin of such in my own mind.{ There are many others to whom I am indebted for particular facts, and 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 involuntary forgetfulness, and I ask pardon beforehand: there is no property, in my opinion, more sacred than the conceptions of the mind; and the custom, too pre- valent among naturalists, of masking plagiarisms by a change of names, has always appeared to me a crime. The publication of my Comparative Anatomy will now occupy me every moment : the materials are ready ; a vast quantity of preparations and drawings are arranged ; 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 my design, what I have produced will still form entire suites, and the materials I have collected be in immediate readiness for those who may undertake the continuation of my labours. Jardin du Roi, October, 1816. ADVERTISEMENT TO THE SECOND EDITION. Tue preceding preface explains faithfully the condition in which I found the history of animals when the first edition of this work was published. During the twelve years that have since elapsed, this science has made immense progress, not only from the acquisitions of numerous travellers, as well-instructed as courageous, who have explored every region of the globe, but by the rich collections which various governments have formed and rendered public, and by the learned and * The surprising researches of M. Ehrenberg, now publishing from M. de Lamarck. time to time, triumphantly refute this allegation.—Ep. + Thave just received L’Histoire des Polypiers correlligencs fleaibles of M. Lamouroux, which furnishes an excellent supplement to t M. de Blainville has recently published general zoological tables, which [ regret came too late for me to profit by, having appeared when my book was nearly printed. ADVERTISEMENT TO THE SECOND EDITION. 11 splendid works, wherein new species are described and figured, and of which the authors have striven to detect their mutual relations, and to consider them in every point of view.* 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 com- paring them with those which served as the basis of my first edition, in order thence to deduce new approximations or subdivisions; and then, by searching in all the books I could procure for the genera or sub-genera established by naturalists, and the descriptions of species by which they have supported these numerous com- binations. The determination of synonymes has become much easier now than at the period of my first edition. Both French and foreign naturalists appear to have recognized the necessity of establishing divisions in the vast genera in which such incongruous species were formerly heaped together ; their groups are now precise and well-defined ; their descriptions sufficiently detailed; their figures scrupulously exact to the most minute characters, and often of the greatest beauty as works of art. Scarcely any difficulty remains, therefore, in identifymg their species, and nothing hinders them from coming to an understanding with respect to the nomenclature. This, unfortunately, has been the most neglected; the names of the same genera, and the Same species, are multiplied as often as they are mentioned ; and should this discord continue, the same chaos will be produced that previously existed, though arising from another cause. I have used every effort to compare and approximate these redundancies, and, forget- ting even my own trifling interest as an author, have often indicated names which seemed to have been imagined only to escape the avowal of having borrowed my divisions. But thoroughly to execute this undertaking,—this pina or rectified epitome of the animal kingdom, which becomes every day more necessary,—to discuss the proofs and fix the definitive nomenclature which should be adopted, by basing it on sufficient figures and descriptions, requires more space than I could dispose of, and a time imperatively claimed by other works. In the History of Fishes, which I have commenced pub- lishing, with the assistance of M. Valenciennes, I purpose to give an idea of what appears to me might be effected in all parts of the science. Here, I only profess to offer an abridged summary—a simple sketch ;—well satisfied if I succeed in rendering this accurate in all its details. Various essays of a similar kind have been published on some of the classes, and I have carefully studied them with a view to perfect my own. The Mammalogie of M. Desmarest, that of M. Lesson, the Treatise on the Teeth of Quadrupeds, by M. Frederic Cuvier, the English translation of my first edition, by Mr. Griffith, enriched by numerous additions, particularly by Hamilton Smith; the new edition of the Manuel d'Ornithologie of M. Temminck, the Ornithological Fragments of M. Wagler, the History of Reptiles of the late Merrem, and the Dissertation on the same subject by M. Fitsinger, have principally been useful to me for the vertebrated animals. The Histoire des Animaux sans Vertibres of M. de Lamarck, the Malacologie of M. de Blainville, have also been of great service to me for the mollusks. To * See my discourse before the Institute on the Progres de Uhistoire naturelle depuis la paix marit:me, published at the close of the first volune of my Eloges. as er Oe ee En eee ee es ee, a ee ae ee eee, st SE | 12 ADVERTISEMENT TO THE SECOND EDITION. these I have added the new views and facts contained in the numerous and learned writings of MM. Geoffroy St. Hilaire, father and son, Savigny, Temminck, Lichtenstein, Kuhl, Wilson, Horsfield, Vigors, Swainson, Gray, Ord, Say, Harlan, Charles Bonaparte, Lamouroux, Mitchell, Lesueur, and many other able and studious men, whose names will be carefully mentioned when I speak of the subjects on which they have treated. The fine collections of engravings which have appeared within the last twelve years, have enabled me to indicate a greater number of species ; and I have amply profited by this facility. I must particularly acknowledge what I owe on this score to the Histoire des Mammiferes of MM. Geoffroy St. Hilaire and Frederic Cuvier, the Planches coloriées of MM. Temminck and Laugier, the Galerie des Oiseaux of M. Vieillot, the new edition of the Birds of Germany, by MM. Nauman, the Birds of the United States of Messrs. Wilson, Ord, and Charles Bonaparte*, the great works of M. Spix, and of his Highness the Prince Maximilian de Wied, on the Animals of Brazil, and to those of M. de Ferussac on the Mollusks. The plates and zoological descriptions of the travels of MM. Freycinet and Duperrey, supplied in the first by MM. Quoy and Gaymard, in the second by MM. Lesson and Garnot, also present many new objects. The same must be said of the Animals of Java, by Dr. Hors- field. Though on a smaller scale, new figures of rare species are to be found in the Mémoires du Muséum, the Annales des Sciences Naturelles, and other French pemr- odicals, in the Zoological Illustrations of Mr. Swainson, and in the Zoological Journal, published by able naturalists in London. The Journal of the Lyceum of New York, and of the Academy of Natural Sciences of Philadelphia, are not less valuable; 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 increases in geometrical progression, and it becomes more and more difficult to collect all the writings of naturalists, and to complete the table of their results. I rely, therefore, on the indulgence of those whose observations may have escaped me, or whose works I have not sufficiently consulted. My celebrated friend and colleague M. Latreille, having consented, as in the first edition, to take upon himself the important and difficult part of the Crustaceans, Arachnides, and Insects, will himself explain in an advertisement the plan he has followed, so that I need say nothing more on this subject. f K * * %* * Jardin du Roi, October, 1828. * The work of M. Audubon upon the Birds of North America, me till after the whole of that part which treats of Bids was which surpasses all others in magnificence, was unknown te printed. INTRODUCTEO WN OF NATURAL HISTORY, AND OF SYSTEMS GENERALLY. As few persons have a just idea of Natural History, it appears necessary to com- mence our work by carefully defining the proposed object of this science, and establish- ing rigorous limits between it and the contiguous sciences. The word Narurg, in our language, and in most others, signifies—sometimes, the qualities which a being derives from birth, in opposition to those which it may owe to art; at other times, the aggregate of beings which compose the universe; and sometimes, again, the laws which govern these beings. It is particularly in this latter sense that it has become customary to personify Nature, and to employ the name, respectfully, for that of its Author. 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 moveable and extended beings which we call bodies. That depart- ment of them styled Dynamics, considers bodies in mass ; and, proceeding from a very small number of experiments, determines mathematically the laws of equilibrium, and those of motion and of its communication. It comprehends in its different divisions the names of Statics, Mechanics, Hydrostatics, Hydrodynamics, Pneumatics, &c., ac- cording to the nature of the bodies of which it examines the motions. Optics considers the particular motions of light; the phenomena of which, requiring experiments for their determination, are becoming more numerous. Chemistry, another branch of General Physics, expounds the laws by which the elementary molecules of bodies act on each other when in close proximity, the com- binations or separations which result from the general tendency of these molecules to unite, and the modifications which different circumstances, capable of separating or approximating them, produce on that tendency. It is a science almost wholly ex- perimental, and which cannot be reduced to calculation. The theory of Heat, and that of Electricity, belong almost equally to Dynamics or Chemistry, according to the point of view in which they are considered. The method which prevails in all the branches of General Physics consists in isolating bodies, reducing them to their utmost simplicity, in bringing each of their properties separately into action, either mentally or by experiment, in observing or calculating the results, in short, in generalizing and correcting the laws of these pro- 14 INTRODUCTION. perties for the purpose of establishing a body of doctrine, and, if possible, of referring the whole to one single law, under the universal expression of which all might be resolved. Particular Physics, or Natural History,—for these terms are synony its object to apply specially the laws recognized by the various branches of General Physics, to the numerous and varied beings which exist in nature, in order to explain the phenomena which they severally present. In this extended sense, it would also include Astronomy ; but that science, suffi- ciently elucidated by Mechanics, and completely subjected to its laws, employs methods too different from those required by ordinary Natural History, to permit of its cultiva- tion by the students of the latter. Natural History, then, is confined to objects which do not allow of rigorous calculation, or of precise measurement in all their parts. Meteorology, also, is subtracted from it, to be ranged under General Physics ; so that, properly speaking, it considers only inanimate bodies, called minerals, and the various kinds of living beings, in all which we may observe the effects, more or less various, of the laws of motion and chemical attraction, and of all the other causes analyzed by General Physics. Natural History should, in strictness, employ the same modes of procedure as the general sciences; and it does so, in fact, whenever the objects of its study are so little complex as to permit of it. But this is very seldom the case. An essential difference, in effect, between the general sciences and Natural History is, that, in the former, phenomena are examined, the conditions of which are all regulated by the examiner, in order, by their analysis, to arrive at general laws ; while in the latter, they occur under circumstances beyond the control of him who studies them for the purpose of discovering, amid the complication, the effects of general laws already known. It is not permitted for him, as in the case of the experimenter, to subtract successively from each condition, and so reduce the problem to its elements; but he must take it entire, with all its conditions at once, and can analyze only in thought. Suppose, for example, we attempt to isolate the numerous pheno- mena which compose the life of an animal a little elevated in the scale; a single one being suppressed, the life is wholly annihilated. Dynamics have thus become a science almost purely of calculation ; Chemistry is still a science wholly [chiefly*] of experiment; and Natural History will long remain, in a great number of its branches, one of pure observation. These three terms sufficiently designate the modes of procedure employed in the three branches of the Natural Sciences ; but in establishing between them very different degrees of certitude, they at the same time indicate the point to ae the two latter should tend, in order to approach perfection. Calculation, so to speak, commands Nature; it determines phenomena more exactly than observation can make them known: experiment forces her to unveil ; while obser- vation watches her when deviating from her normal course, and seeks to surprise her. Natural History has, moreover, a principle on which to reason, which is peculiar to it, and which it employs advantageously on many occasions ; it is that of the conditions of existence, commonly termed final causes. As nothing can exist without the concur- rence of those conditions which render its existence possible, the component parts of each * The discovery of the atomic theory has reduced many of its phenomena to ealculation.—Ep. INTRODUCTION. 15 must be so arranged as to render possible the whole living being, not only with regard to itself, but to its surrounding relations; and the analysis of these conditions fre- quently conducts to general laws, as demonstrable as those which are derived from calculation or experiment. It is only when all the laws of general physics, and those which result from the condi- tions of existence, are exhausted, that we are reduced to the simple laws of observation. The most effectual mode of observing is by comparison. This consists in suc- cessively studying the same bodies in the different positions in which Nature places them, or in a comparison of different bodies together, until constant relations are recognized between their structures and the phenomena which they manifest. These various bodies are kinds of experiments ready prepared by Nature, who adds to or subtracts from each of them different parts, just as we might wish to do in our laboratories, and shows us herself the results of such additions or retrenchments. It is thus that we succeed in establishing certain laws, which govern these relations, and which are employed like those that have been determined by the general sciences. The incorporation of these laws of observation with the general laws, either directly or by the principle of the conditions of existence, would complete the system of the natural sciences, in rendering sensible in all its parts the mutual influence of every being. This itis to which the efforts of those who cultivate these sciences should tend. All researches of this kind, however, presuppose means of distinguishing with certainty, and causing others to distinguish, the objects investigated ; otherwise we should be incessantly liable to confound the innumerable beings which Nature presents. Natural History, then, should be based on what is called a System of Nature, or a great catalogue, in which all beings bear acknowledged names, may be recognized by distinctive cha- racters, and distributed in divisions and subdivisions themselves named and characterized, in which they may be found. In order that each being may always be recognized in this catalogue, it should carry its character along with it: for which reason the characters should not be taken from properties, or from habits the exercise of which is transient, but should be drawn from the conformation. There is scarcely any being which has a simple character, or can be recognized by an isolated feature of its conformation: the combination of many such traits is almost always necessary to distinguish a being from the neighbouring ones, which have some but not all of them, or have them combined with others of which the first is destitute ; and the more numerous the beings to be discriminated, the more must these traits accumulate: insomuch that, to distinguish from all others an individual being, a complete description of it must enter into its character. It is to avoid this inconvenience that divisions and subdivisions have been invented. A certain number of neighbouring beings only are compared together, and their par- ticular characters need only to express their differences, which, by the supposition itself, are the less important parts of their conformation. Such a reunion is termed a genus. The same inconvenience would recur in distinguishing genera from each other, were it not that the operation is repeated in collecting the neighbouring genera, so as to form an order ; the neighbouring orders to form a class, &c. Intermediate subdivisions may also be established. This scaffolding of divisions, the superior of which contain the inferior, is what is Oe ie nS Sk ee 16 INTRODUCTION called a method. It is, in some respects, a sort of dictionary, in which we proceed from the properties of things to discover their names ; being the reverse of ordinary dic- tionaries, in which we proceed from the names to obtain a knowledge of the properties. When the method, however, is good, it does more than teach us names. If thesub- divisions 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 reducing the properties of these beings to general rules, of expressing them in the fewest words, and of stamping them on the memory. To render it such, an assiduous comparison of beings is employed, directed by the principle of the subordination of characters, which is itself derived from that of the conditions of existence. All the parts of a being having a mutual correlativeness, some traits of conformation exclude others ; while some, on the contrary, necessitate others : when, therefore, we perceive such or such traits in a being. we can calculate before- hand those which co-exist in it, or those that are incompatible with them. The parts, 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 what are called important characters, dominant characters ; the others are the subordinate characters, ali varying, however, in degree. This influence of characters is sometimes determined rationally, by considering the nature of the organ: when this is impracticable, recourse must be had to simple observation; and a sure means of recognizing the important characters, which is derived from their own nature, is, that they are more constant; and that in a long series of different beings, approximated according to their degrees of similitude, these characters are the last to vary. From their influence and from their constancy result equally the rule, which should be preferred for distinguishing grand divisions, and in proportion as we descend to the inferior subdivisions, we can also descend to subordinate and variable characters. There can only be one perfect method, which is the natural method. An arrangement is thus named in which beings of the same genus are placed nearer to each other than to those of all other genera; the genera of the same order nearer than to those of other orders, and so in succession. This method is the ideal to which Natural History should tend ; for it is evident that, if we can attain 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 its differences from them; and all these relations would be fully given by the arrangement which we have indicated. In a word, the natural method would be the whole science, and each step towards it tends to advance the science to perfection. Life being the most important of all the properties of beings, and the highest of all characters, it is not surprising that it has been made in all ages the most general prin- ciple of distinction; and that natural beings have always been separated into two immense divisions, the living and the inanimate. OF LIVING BEINGS, AND OF ORGANIZATION IN GENERAL. If, in order to obtain a just idea of the essence of life, we consider it in those beings in which its effects are the most simple, we readily perceive that it consists in the {NTRODUCTION. faculty which certain corporeal combinations have, of enduring for a time, and under a determinate form, by incessantly attracting into their composition a part of sur- rounding substances, and rendering to the elements portions of their own proper substance. Life, then, is a vortex (¢ouwrbillon), more or less rapid, more or less complicated, the direction of which is constant, and which always carries along molecules of the same kind, but into which individual molecules are Eatenaliyy entering, and from which they are constantly departing ; so that the form of a living body is more essential to it than its matter. As long as this movement subsists, the body in which it takes place is living— it lives. When it is permanently arrested, the body dies. After death, the elements which compose it, abandoned to the ordinary chemical affinities, are not slow to separate, from which, more or less quickly, results the dissolution of the body that had been living. It was then by the vital motion that its dissolution was arrested, and that the elements of the body were temporarily combined. All living bodies die after a time, the extreme limit of which is determined for each species; and death appears to be a necessary consequence of life, which, by its own action, insensibly alters the structure of the body wherein its functions are exercised, so as to render its continuance impossible. In fact, the living body undergoes gradual but constant changes during the whole term of its existence. It increases first in dimensions, according to the proportions and within the limits fixed for each species, and for each of its several parts; then it augments in density, in most of its parts :—it is this second kind of change that appears to be the cause of natural death. On examining the various living bodies more closely, a common structure is discerned, which a little reflection soon causes us to adjudge as essential to a vortex, such as the vital motion. Solids, it is evident, are necessary to these bodies for the maintenance of their forms, and fluids for the conservation of motion in them. Their tissue, then, is com- posed of interlacement and network, or of fibres and solid laminz, which inclose the liquids in their interstices: it is in these liquids that the motion is most continual and most extended ; the extraneous substances penetrate the intimate tissue of bodies in incorporating with them ; they nourish the solids by interposing their molecules, and also detach from them their superfluous molecules: 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 these fluids, and by their contraction communicate to them a part of their motion. This mutual action of the solids and fluids, this passage of molecules from one to the other, necessitated considerable affinity in their chemical composition ; and, accord- ingly, the solids of organized bodies are in great part composed of elements easily convertible into liquids or gases. The motion of the fluids, requiring also a continually repeated action on the part of the solids, and communicating one to them, demanded of the latter both flexibility and dilatability; and hence we find this character nearly general in all organized solids. This fundamental structure, common to all living bodies—this areolar tissue, the more Cc 15 INTRODUCTION or less flexible fibres or lamine of which intercept fiuids more or less abundant — constitutes what is termed the organization ; and, as a consequence of what we have said, it follows that only organized bodies can enjoy life. Organization, then, results from a great number of dispositions or arrangements, which are all conditions of life; and it is easy to conceive that the general move- ment of the life would be arrested, if its effect be to alter either of these conditions, so as to arrest even one of the partial motions of which it is composed. Every organized body, besides the qualities common to its tissue, has one proper form, not only in general and externally, but also in the detail of the structure of each of its parts ; and it is upon this form, which determines the particular dircction of each of the partial movements that take place in it, that depends the complication of the general movement of its life, which constitutes its species, and renders it what it is. Each part concurs in this general movement by a peculiar action, and experiences from it particular effects; so that, im every being, the life is a whole, resulting from the mutual action and reaction of all its parts. Life, then, in general, presupposes organization in general, and the life proper to each being presupposes the organization peculiar to that being, just as the movement otf a clock presupposes the clock ; and, accordingly, we behold life only in beings that are organized and formed to enjoy it; and all the efforts of philo- sophers have not yet been able to discover matter in the act of organization, either of itself or by any extrinsic cause. In fact, life exercising upon the elements which at every instant form part of the living body, and upon those which it attracts to it, an action contrary to that which would be produced without it by the usual chemical affinities, it is inconsistent to suppose that it can itself be produced by these affinities, and yet we know of no other power in nature capable of reuniting 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 of which we can trace the origin, have at first been attached to a body of the same form as their own, but which was developed before them ;—in one word, to a parent. So long as the offspring has no independent life, but par- ticipates in that of its parent, it is called a germ. The place to which the germ is attached, and the occasional cause which detaches it, and gives it an independent life, vary; but the primitive adherence to a similar being is a rule without exception. The separation of the germ is what is designated generation. All organized beings produce similar ones ; otherwise, death being a necessary con- sequence of life, their species would not endure. Organized beings have even the faculty of reproducing, in degrees varying with the species, certain of their parts of which they may have been deprived. This has been named the power of reproduction. The developement of organized beings is more or less rapid, and more or less ex- tended, according as circumstances are differently favourable. Heat, the supply and quality of nourishment, with other causes, exert great influence; and this influence may extend to the whole body in general, or to certain organs in particular :— hence the similitude of offspring to their parents can never be complete. INTRODUCTION. 19 Differences of this kind, between organized beings, are what are termed varieties. There is no proof that all the differences which now distinguish organized beings are such as may have been produced by circumstances. All that has been advanced upon this subject is hypothetical: experience seems to show, on the contrary, that, in the actual state of things, varieties are confined within rather narrow limits; and, so far as we can retrace antiquity, we perceive that these limits were the same as at present. We are then obliged to admit of certain forms, which, since the origin of things, have been perpetuated without exceeding these limits ; and all the beings appertaining to one of these forms constitute what is termed a species. 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 reunion of individuals descended one from the other, or from common parents, or from such as resemble them as closely as they resemble each other ; but, although this definition is rigorous, it will be seen that its application to particular individuals may be very difficult when the necessary experi- ments have not been made.* To recapitulate,—absorption, assimilation, exhalation, developement, and generation, are the functions common to all living beings ; birth and death, the universal limits of their existence ; a porous, contractile tissue, containing within its lamine liquids or gases in motion, the general essence of their structure; substances almost all susceptible of being converted into liquids or gases, and combinations capable of easy transformation into one another, the basis of their chemical composition. Fixed forms, and which are perpetuated by generation, distinguish their species, determine the complication of the secondary functions proper to each of them, and assign to them the office they have to fulfil in the grand scheme of the universe. These forms neither produce nor change themselves; the life supposes their existence; it can exist only in organizations already prepared ; and the most profound meditations, assisted by the most delicate observations, can penetrate no further than the mystery of the pre-existence of germs. DIVISION OF ORGANIZED BEINGS INTO ANIMALS AND VEGETABLES. Living or organized beings have been subdivided, from the earliest times, into ani- mate beings, or those possessing sense and motion, and inanimate beings, which enjoy * That insurmountable difficulties oppose the rigid determination of species, and, consequently, render even the definition of the term impossible, except in a very vague und loose manner, will readily appear on consideration of some of the phenomena presented. The prevalent idea is, that a species consists of the aggregate of individuals descended from one original parentage, which alone are supposed to be capable of producing offspring that are prolific inter se; und that when individuals, not of the same pristine derivation, interbreed, the hybrids are necessarily mules, which are either quite sterile, or at most can only propagate with individuals of unmixed descent. But itso happens, that every possible grade of approxi- mation is manifested, from the most diverse races, to those which are utterly undistinguishable ; while, even in the latter case, urgent ana- logies, notwithstanding, sometimes forcibly indicate a separateness of origin ; as when a series of analogous races inhabiting distant regions are compared together, some of which are obviously different, others doubtfully so, and some apparently identical. And it remains to be shown whether such intimately allied races as some of these, even if not descended from a common stock, (which of course cannot be ascertained), would not produce hybrids capable of transmitting and perpetuating the mingled breed. It is true that Cuvier guards against this contingency, in the wording of his definition; and that most naturalists would concur in regarding such miscible races, how- ever dissimilar, as varieties merely of the same; but a question arises, whether there be not different degrees of fertility in hybrids, corresponding to the amount of affinity, or physiological accordancy, subsisting betwixt the parent races; it being only within a certain sphere of that affinity that they can be produced at all : besides which, as hybrids are seldom exactly intermediate, and in some instances (particularly among multiparous races) have been known to resemble entirely one or the other parent, it ray be presumed that this circum- stance would also materially affect their capability of propagation. Experiments are needed to solve this important problem, though there is every reason to suspect that the following proposition will eventu- ally gain the general assent of naturalists, viz., that while consideraile dissimilarity does not of necessity imply specifical diversity, the cun- verse equally holds, that absolute resemblance fails of itself to con stitute specifical identity.—Epv. CZ 20 INTRODUCTION. neither the one nor the other of these faculties, but are reduced to the simple function of vegetating. Although many plants retract their leaves when touched, and the roots direct themselves constantly towards moisture, the leaves towards air and light, and though some parts of vegetables appear even to exhibit oscillations without any perceptible external cause, still these various movements bear too little resem- blance to those of animals to enable us to recognize in them any proofs of perception or of will. The spontaneity of the movements of animals required essential modifications, even in their simply vegetative organs. Their roots not penetrating the ground, it was necessary that they should be able to place within themselves provisions of food, and to carry its reservoir along with them. Hence is derived the first character of animals, or their alimentary cavity, from which their nutritive fluid penetrates all other parts through pores or vessels, which are a sort of internal roots. The organization of this cavity and of its appurtenances required varying, according to the nature of the aliment, and the operations which it had to undergo before it could furnish juices proper for absorption : whilst the atmosphere and the earth supply to vegetables only juices ready prepared, and which can be absorbed immediately. The animal body, which abounds with functions more numerous and more varied than in the plant, required in consequence to have an organization much more com- plicated ; besides which, its parts not being capable of preserving a fixed relative posi- tion, there were no means by which the motion of their fluids could be produced by external causes, as it required to be independent of heat and of the atmosphere: from this originates the second character of animals, or their circulatory system, which is less essential than the digestive, since it was unnecessary in the more simple animals. The animal functions required organic systems, not needed by vegetables, as that of the muscles for voluntary motion, and that of the 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 more numerous in animals, and that the chemical composition of the animal body should be more complicated than that of the plant: and so it is, for an additional substance (azote) enters into it as an essential element, while 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. The soil and the atmosphere supply to vegetables water for their nutrition, which is composed of oxygen and hydrogen, air, which contains oxygen and azote, and car- bonic acid, which is a combination of oxygen and carbon. To extract from these aliments their proper composition, it was necesary that they should retain the hydrogen and carbon, exhale the superfluous oxygen, and absorb little or no azote. Such, then, is the process of vegetable life, of which the essential function is the exhalation of oxygen, which is effected through the agency of light. Animals in addition derive nourishment, more or less immediately, from the vegetable itself, of which hydrogen and carbon form the principal constituents. To assimilate them to their own composition, they must get rid of the superfluous hydrogen, and especially of the superabundant carbon, and accumulate more azote; this it is which is performed in respiration, by means of the oxygen of the atmosphere combining with the hydrogen and carbon of the blood, and being exhaled with them under the form of (eee INTRODUCTION. 21 water and carbonic acid. The azote, whatever part of their body it may penetrate, appears to remain there. The relations of vegetables and animals with the atmosphere are then inverse; the former retain (défont) water and [decompose] carbonic acid, while the latter reproduce them. Respiration is the function essential to the constitution of an animal body ; it is that which in a manner animalizes it; and we shall see that animals exercise their peculiar functions more completely, according as they enjoy greater powers of respira- tion. It is in this difference of relations that the fourth character of animals consists. OF THE FORMS PECULIAR TO THE ORGANIC ELEMENTS OF THE ANIMAL BODY, AND OF THE PRINCIPAL COMBINATIONS OF ITS CHEMICAL ELEMENTS. An arevlar tissue and three chemical elements are essential to every living body, a fourth element being peculiar to that of animals; but this tissue is composed of vari- ously formed meshes, and these elements are united in different combinations. There are three kinds of organic materials, or forms of tissue,—the cellular membrane, the muscular fibre, and the medullary matter; and to each form belongs a peculiar combination of chemical elements, together with a particular function. The cellular membrane is composed of an infinity of small lamine, fortuitously dis- posed, so as to form little ceils that communicate with each other. It is a sort of sponge, which has the same form as the entire body, all other parts of which fill or traverse it. Its property is to contract indefinitely when the causes which sustain its extension cease to operate. It is this force that retains the body in a given form, and within determined limits. When condensed, this substance forms those more or less extended lamine which are called membranes ; the membranes, rolled into cylinders, compose those tubes, more or less ramified, which are termed vessels ; the filaments, named fibres, resolve them- selves into it; and the bones are nothing but the same, indurated by the accumulation of earthy particles. The cellular substance consists of that combination [isinglass] which bears the name of gelatine, and the character of which is to dissolve in boiling water, and to assume the form, when cold, of a trembling jelly. The medullary matter has not yet been reduced to its organic molecules: it ap- pears to the naked eye as a sort of soft bowillie [pultaceous mass], consisting of exces- sively 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 of conveying to the muscles the mandates of the will. The brain and the spinal chord are chiefly composed of it; and the nerves, which are distributed to all the sentient organs, are, essentially, but ramifications of the same. The fleshy or muscular fibre is a peculiar sort of filament, the distinctive property of which, during life, is that of contracting when touched or struck, or when it experi- ences, through the medium of the nerves, the action of the will. The muscles, immediate organs of voluntary motion, are merely bundles of fleshy fibres. All the membranes, all the vessels which need to exercise any compression, are furnished with these fibres. They are always intimately connected with nervous threads; but those which subserve the purely vegetative functions contract without 22 INTRODUCTION. the knowledge of the mz, so that the will is indeed one means of causing the fibres to act, but which is neither general nor exclusive. The fleshy fibre has for its base a particular substance termed fibrine, which is insoluble in boiling water, and of which the nature appears to be to take of itself this filamentous form. The nutritive fluid, or the blood, such as we find in the vessels of the circulation, not only resolves itself principally into the general elements of the animal body,—carbon, hydrogen, oxygen, and azote, but it also contains fibrine and gelatine, all but disposed to contract, and to assume the forms of membranes or of filaments peculiar to them ; nought being ever acquired for their manifestation but a little repose. The blood pre- sents also another combination, which occurs in many animal solids and fluids, namely, albumen [or white of egg], the characteristic property of which is to coagulate in boiling water. Besides these, the blood contains almost all the elements which may enter into the composition of the body of each animal, such as the lime and phosphorus, which hardens the bones of vertebrated animals, the iron, which colours the blood itself as well as various other parts, the fat or animal oil, which is deposited in the cellular substance to maintain it, &c. All the fluids and solids of the animal body are composed of chemical elements contained in the blood; and it is only by possessing some ele- ments more or less, or in different proportions, that each is severally distinguished ; whence it becomes apparent 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 elsewhere. The various operations, by which the blood supplies nourishment to the solid or liquid matter of all parts of the body, may take the general name of secretion. This term, however, is often exclusively appropriated to the production of liquids, while that of nutrition is applied more especially to the production and deposition of the matter necessary to the growth and conservation of the solids. Every solid organ, as well as fluid, has the composition most appropriate for the office which it has to perform, and it preserves it so long as health continues, because the blood renews it as fast as it becomes changed. ‘The blood itself, by this continual contribution, is altered every moment; but is restored by digestion, which renews its matter; by respiration, which sets free the superfluous carbon and hydrogen; and by perspiration and various other excretions, that relieve it from other superabundant principles. These perpetual changes of chemical composition constitute part of the vital vortex, not less essential than the visible movements and those of translation: the object, in- deed, of these latter is simply to produce the former. OF THE FORCES WHICH ACT IN THE ANIMAL BODY. The muscular fibre is not only the organ of voluntary motion; we have seen that it is also the most powerful of the means employed by nature to effect the move- ments of translation necessary to vegetative life. Thus the fibres of the intestines pro- duce the peristaltic motion, which causes the aliment to pass onward along this canal; the fibres of the heart and arteries are the agents of the circulation, and, through it, of all the secretions, &c. INTRODUCTION. 23 The will causes the fibre to contract through the medium of the nerve; and the involuntary fibres, such as those we have mentioned, are equally animated by the nerves which pervade them ; it is, therefore, probable, that these nerves are the cause of their contraction. All contraction, and, generally speaking, all change of dimension in nature, is produced by a change of chemical composition, though it consists merely in the flowing or ebbing of an imponderable *, such as caloric; it is thus also that the most violent of known movements are occasioned, as combustions, detonations, &c. There is, then, great reason for supposing that it is by an imponderable fluid that the nerve acts upon the fibre ; and the more especially, as it is demonstrated that this action is not mechanical. The medullary matter of the whole nervous system is homogeneous, and must exercise, wherever it is found, the functions appertaining to its nature ; all its ramifi- cations receive a great abundance of blood-vessels. All the animal fluids being derived from the blood by secretion, it cannot be doubted that the same holds with the nervous fluid, nor that the medullary matter secretes [or evolves] it. On the other hand, it is certain that the medullary matter is the sole conductor of the nervous fiuid ; and that all the other organic elements serve as non-conductors, and arrest it, as glass arrests electricity. The external causes which are capable of producing sensations, or of occasioning contractions in the fibre, are all chemical agents, capable of effecting decompositions, such as light, caloric, the salts, odorous vapours, percussion, compression, &c. It would seem, then, that these causes act upon the nervous fluid chemically, and by changing its composition: which appears the more likely, as their action becomes weakened by continuance, as if the nervous fluid needed to resume its primitive com- position in order to be altered anew. The external organs of sense may be compared to sieves, which allow nothing to pass through to the nerve except the species of agent which should affect it in that particular place, but which often accumulates so as to increase the effect. The tongue has its spongy papille, which imbibe saline solutions: the ear a gelatinous pulp, which is intensely agitated by sonorous vibrations; the eye transparent lenses, which concentrate the rays of light, &c. It is probable that what are styled irritants, or the agents which occasion the con- tractions of the fibre, exert this action by producing on the fibre, by the nerve, the same effect which is produced by the will; that is to say, by altering the nervous fluid in the manner necessary to change the dimensions of the fibre on which it has influence ; but the will has nothing to do in this action; the me is often even without any knowledge of it. The muscles separated from the body are still susceptible of irrita- tion, so long as the portion of the nerve distributed within them preserves its power of acting on them; the will being evidently unconnected with this phenomenon. The nervous fluid is altered by muscular irritation, as well as by sensation and voluntary motion; and the same necessity occurs for the re-establishment of its primi- tive composition. The movements of translation necessary to vegetative life are determined by irritants : * “ Tmponderable fluid” is the expression in the original.—Ep. 24 INTRODUCTION. the aliment irritates [or excites] the intestine, the blood irritates the heart, &c. These movements are all independent of the will, and in general (while health endures) take place without the cognizance of the me; the nerves which produce them have even, in several parts, a different distribution from that of the nerves affected by sensations or subject to the will, and the object of the difference appears to be the securing of this independence.* The nervous functions, that is to say, sensitiveness and muscular irritability, are so much the stronger at every point, in proportion as the exciting cause is more abundant ; and as this agent, or the nervous fluid, is produced by secretion [or evolution], its abundance must be in proportion to the quantity of medullary or secretory matter, and the amount of blood received by the latter. In animals that have a circulation, the blood is propelled 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 vigorously, and propel a greater quantity of blood ; the nervous fluid becomes more abundant, and augments the local sensibility ; this, in its turn, increases the irritability of the arteries, so that this mutual action may It is termed orgasm, and when it becomes painful and The irritation may also originate in the nerve, when it be carried to a great extent. permanent, inflammation. experiences acute sensations. This mutual influence of the nerves and fibres, either in the intestinal system, or in the arterial system, is the real spring of vegetative life in animals. As each external sense is permeable only by particular kinds of sensation, so Thus, These each internal organ may be accessible only to such or such agent of irritation. mercury irritates the salivary glands, cantharides excite the bladder, &c. agents are what are termed specijics. The nervous system being homogeneous and continuous, Joca] sensations and irrita- tion debilitate the whole: and each function, carried too far, may enfeeble the others. Excess of aliment thus weakens the faculty of thought; while prolonged meditation impairs the energy of digestion, &c. Excessive local irritation will enfeeble the whole body, as if all the powers of life were concentrated on a single point. A second irritation produced at another point may diminish, or divert as it is termed, the first ; such is the effect of purgatives, blisters, &c. [denominated counter-irritation]. All rapid as the foregoing enunciation is, it is sufficient to establish the possibility of accounting for all the phenomena of physical life, by the simple admission of a fluid such as we have defined, from the properties which it manifests. * Jn the above sentence, there are distinctly mentioned the three sorts of nerves, the separate functions of which have been con- clusively demonstrated by Sir Charles Bell: viz., nerves of volition, which transmit the mandates of the will; of sensation, which convey to the sensorium the impressions of the senses; and of sympathy, or involuntary movement, the reunion of the ramifications of which in a plexus of knots, or ganglions, is intimated in the text, those of the second class being distinguished by a swelling or ganglion near their base.—Ep. + The unceasing chemical changes consequent upon vitality must necessarily develope electricity ; and that the nervous fluid is no other than the electric, may be considered as proved by the identity of their phenomena. Indeed, it has long been known that the transmission of voltaic electricity along the nerves of a recently dead animal, suffices to produce the most violent muscular action; but the regula- tion of that action, its exclusive direction to particular suites of muscles, requires the vital impulse. “If the brain,’ remarks Sir John Herschel, “ (for which wonderfully constituted organ no other mode of action possessing the least probability has ever been devised), be an electric pile, constantly in action, it may be conceived to dis- charge itself at regular intervals, when the tension of the electricity developed reaches a certain point, along the nerves which commnuni- cate with the heart, and thus to excite the pulsations of that organ. This idea is forcibly suggested by a view of that eleyant apparatus, the dry pile of Deluc, in which the successive accumuiations of electricity are carried off by a suspended ball, which is kept, by the discharges, in a state of regular pulsation for any length of time. We have witnessed the action of sucha pile, maintained in this way for whole years, in the study of the above-named eminent philosopher. The same idea of the cause of the pulsation of the heart appears to have occurred to Dr. Arnott, and is mentioned in his useful and ex- cellent work on Physics, to which, however, we are not indebted for the suggestion, it having occurred to us independently many years ago.’'—Discourse on the Study of Natural Philosophy, p. 343.—Ep. a a 2 2 | INTRODUCTION. to Or SUMMARY IDEA OF THE FUNCTIONS AND ORGANS OF THE BODIES OF ANIMALS, AND OF THEIR VARIOUS DEGREES OF COMPLICATION. After what we have stated respecting the organic elements of the body, its chemical principles, and the forces which act within it, it remains only to give a sum- mary idea in detail of the functions of which life is composed, and of their respective 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; that is to say, nutrition and generation. Sensibility resides in the nervous system. The most general external sense is that of touch ; its seat is in the skin, a mem- brane enveloping the whole body, and traversed all over by nerves, of which the extreme filaments expand on the surface into papille, and are protected by the epider- mis, and by other insensible teguments, such as hairs, scales, &c. Taste and smell are merely delicate states of the sense of touch, for which the skin of the tongue and nostrils is particularly organized; the former by means of papille more convex and spongy; the latter, by its extreme delicacy and the multiplication of its ever humid surface. We have already spoken of the eye and ear in general. The organ of gene- ration is endowed with a sixth sense, which is seated in its internal skin; that of the stomach and intestines declares the state of those viscera by peculiar sensations. In fine, sensations more cr less painful may originate in all parts of the body through accidents or diseases. Many animals have neither ears nor nostrils; several are without eyes, and some are reduced to the single sense of touch, which is never absent. The action received by the external organs is continued through the nerves to the central masses of the nervous system, which, in the higher animals, consists of the brain and spinal chord. The more elevated the nature of the animal, the more volumi- nous is the brain, and the more the sensitive power is concentrated there ; in propor- tion as the animal is placed lower in the scale, the medullary masses are dispersed, and in the lowest genera of all, the nervous substance appears to merge altogether, and blend in the general matter of the body. That part of the body which contains the brain suid the principal organs of sense, is called the head. When the animal has received a sensation, and which has induced in it an act of volition, it is by [particular] nerves also that this volition is transmitted to the muscles. The muscles are bundles of fleshy fibres, the contractions of which produce all the movements of the animal body. The extensions of the limbs, and all the lengthenings of parts, are the effect of muscular contractions, equally with flexions and abbreviations. The muscles of each animal are disposed in number and direction according to the movements which it has to execute ; and when these movements require to be effected with some vigour, the muscles are inserted into hard parts, articulated one over another, and may be considered as so many levers. These parts are called bones in INTRODUCTION. the vertebrated animals, where they are internal, and formed of a gelatinous mass, penetrated with molecules of phosphate of lime. In mollusks, crustaceans, and insects, where they are external, and composed of a calcareous or corneous substance that exudes between the skin and epidermis, they are termed shells, crusts, and scales. The fleshy fibres are attached to the hard parts by means of other fibres of a gela- tinous nature, which seem to be a continuation of the former, constituting what are called tendons. The configuration of the articulating surfaces of the hard parts limits their move- ments, which are further restrained by cords or envelopes attached to the sides of the articulations, and which are termed hgaments. It is from the various dispositions of this bony and muscular apparatus, and from the form and proportions of the members which result therefrom, that animals are capable of executing those innumerable movements which enter into walking, leaping, flight, and swimming. The muscular fibres appropriated to digestion and circulation are independent of the will; they receive nerves, however, but, as we have said, the chief of them exhibit subdivisions and enlargements which appear to have for their object the estrangement of the empire of the mz. It is only in paroxysms of the passions and other powerful mental emotions, which break down these barriers, that the empire of the mE becomes perceptible; and even then its effect is almost always to disorder these vegetative functions. It is also ina state of sickness only that these functions are accompanied by sensations. Digestion is ordinarily performed unconsciously. The aliment, divided by the jaws and teeth, or sucked up when liquids con- stitute the food, is swallowed by the muscular movements of the back part of the mouth and throat, and deposited in the first portion of the alimentary canal, usually expanded into one or more stomachs; it there is penetrated with juices proper to dis- solve it. Conducted thence along the rest of the canal, it receives other juices destined to complete its preparation. The parietes of the canal have pores which extract from this alimentary mass its nutritious portion, and the useless residue is rejected as excrement. The canal in which this first act of nutrition is performed, is a continuation of the skin, and is composed of similar layers; even the fibres which 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 cutaneous perspiration, and which becomes more abundant when the latter is suppressed ; the skin even exercises an absorption very analogous to that of the intestines. It is only in the lowest animals that the excrements are rejected by the mouth, and in which the intestine has the form of a sac without issue. Among those even in which the intestinal canal has two orifices, there are many in which the nutritive juices, absorbed by the coats of the intestine, are immediately diifused over the whole spongy substance of the body: this appears to be the case with the whole class of insects. But, ascending from the arachnides and worms, the nutritive fluids circulate ina system of confined vessels, the ultimate ramifications of which alone dispense its molecules to the parts that are nourished by it; those particular vessels which convey it are named a INTRODUCTION. 27 arteries, and those which bring it back to tne centre of the circulation are termed veins. The circulating vortex is sometimes simple, sometimes double, and even triple (includ- ing that of the vena porta) ; the rapidity of its movements is often aided by the contrac- tions of a certain fleshy apparatus denominated hearts, and which are 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 white or transpa- rent from the intestines, and is then termed chyle; it is poured by particular vessels, named Jacteals, into the venous system, where it mingles with the blood. Vessels resembling these lacteals, and forming with them what is known as the lymphatic system, also convey to the venous blood the residue of the nutrition of the parts and the products of cutaneous absorption. Before the blood is proper to nourish the several parts, it must experience from the ambient element, by respiration, the modification of which we have already spoken. In animals which have a circulation, a portion of the vessels is destined to carry the blood into organs, where they spread over an extensive surface, that the action of the ambient element might be increased. When this element [or medium] is the air, the surface is hollow, and is called lungs ; when water, it is salient, and termed gills.* There are always motive organs disposed for propelling the ambient element into, or upon, the respiratory organ. In animals which have no circulation, the air is diffused through every part of the body by elastic vessels, named trachee; or water acts upon them, either by pene- trating through vessels, or by simply bathing the surface of the skin. The blood which is respired is qualified for restoring the composition of all the parts, and to effect what is properly called nutrition. It is a great marvel that, with this facility which it has of becoming decomposed at each point, it should leave precisely the species of molecule which is there necessary; but it is this wonder which consti- tutes 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 liquids, the apparatus is more complex and various. Sometimes the extremities of the vessels simply spread over large surfaces, whence the produced fluid exudes; sometimes it oozes from the bottom of little cavities. Very often, before these arterial extremities change into veins, they 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-vessels and these latter termed especial, form, by their interlacement, the bodies called conglomerate or secretory glands. In animals that have no circulation, and particularly insects, the nutritive fluid bathes all the parts ; each of them draws from it the molecules necessary for its suste- nance : if it be necessary that some liquid be produced, the appropriate vessels float in the nutritive fluid, and imbibe from it, by means of their pores, the constituent elements of that liquid. It is thus that the blood incessantly supports all the parts, and repairs the altera- tions which are the continual and necessary consequence of their functions. The * It may be remarked here, that, in strictness of language, 10 respiration of animals is, that some breathe the free air, and are sup- animals respire water, but the air which is suspended in water, and plied with lungs, and others that diffused in water, and have there- which has been ascertained to contain more oxygen than that of the fore gills : but even this difference, however, is more apparent than free atmosphere. The elements of water, it should be remembered, are real, as in ull cases the respiratory surface requires to be moist or wet, chemically combined, while those of air are only mechanically mixed. | in order to perform its function. Deprive water of its air by builing it, To obtain oxygen from the one, therefore, decomposition is required ; | and it cannot support life.—Ep. from the other, no disunion. The only distinction, then, in the a ne a | 28 INTRODUCTION. general ideas which we form respecting this process are tolerably clear, although we have no distinct 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 transformations necessary to produce it. Besides the glands which separate from the blood those fluids which perform some office in the internal economy, there are some which detach others from it that are to be totally rejected, either simply as superfluities, such as the urine, which is produced by the kidneys, or for some use to the animal, as the ink of the cuttle, and the purple matter of various other mollusks, &c. With respect to generation, there is one process {Or phenomenon infinitely more difficult to conceive than that of the secretions ; it is the production of the germ. We have seen even that it may be regarded as little less than incomprehensible; but, the existence of the germ once admitted, generation presents no particular difficulty : so long as it adheres to the parent, it is nourished as if it were one of its organs*; and when it detaches itself, it has its own proper life, which is essentially similar to that of the adult. The germ, the embryo, the fcetus, and the new-born animal, have in no instance, however, precisely the same form as the adult, and the difference is sometimes so great, that their assimilation merits the name of metamorphosis. Thus, no one not previously -| aware of the fact, would suppose that the caterpillar is to become a butterfly. All living beings are more or less metamorphosed in the course of their growth, that is to say, they lose certain parts, and develope others. The antenne, wings, and all the parts of the butterfly were inclosed within the skin of the caterpillar; this skin disappears along with the jaws, feet, and other organs that do not remain in the butterfly. The feet of the frog are inclosed by the skin of the tadpole: and the tad- pole, to become a frog, loses its tail, mouth, and gills. The infant likewise, at birth, loses its placenta and envelope ; at a certain age its thymous gland almost disappears ; and it acquires by degrees its hair, teeth, and beard. The relative size of its organs alters, and its body increases proportionally more than its head, its head more than its internal ear, &c. The place where these germs are found, the assemblage of them, is named the ovary ; the canal through which, when detached, they are carried forward, the oviduct; the cavity in which, in many species, they are obliged to remain for a longer or shorter period before birth, the matrix or uterus ; the exterior orifice through which they pass into the world, the vulva. When there are sexes, the male sex fecundates; the germs appearing m the female. The fecundating liquor is named semen; the glands which separate it from the blood, festicles ; and, when it is necessary that it should be intro- duced into the body of the female, the intromittent organ is called a penis. RAPID EXPOSITION OF THE INTELLECTUAL FUNCTIONS OF ANIMALS. The impression of external objects on the mx, the production of a sensation, of an image, is a mystery impenetrable to our intellect; and materialism an hypothesis, so much the more conjectural, as philosophy can furnish no direct proof of the actual « Germs have been detected in the ovaria of a human foetus.—Ep. INTRODUCTION. vy existence of matter. But the naturalist should examine what appear to be the mate- rial conditions of sensation’; he should trace the ulterior operations of the mind, ascer- tain 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. For the mr to perceive, there must be an uninterrupted nervous communication between the external sense and the central masses of the medullary system. Hence it is only when a modification is experienced by these masses that the mz perceives : there may also be real sensations, without the external organ being affected, and which originate either in the nervous passage, 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, which is more circum- scribed as the animal is more perfect. In man, it consists exclusively of a limited portion of the brain; but in reptiles, it includes the brain and the whole of the medulla, and each of their parts taken separately; so that the absence of the entire brain does not prevent sensation. In the inferior classes this extension is still greater. The perception acquired by the mr, produces the image of the sensation ex- perienced. We trace to without the cause of that sensation, and thus acquire the idea of the object which produces it. By a necessary law of our intelligence, all the ideas of material objects are in time and space. The modifications experienced by the medullary masses leave impressions there, which are reproduced, and recall to mind images and ideas; this is memory, a cor- poreal faculty that varies considerably, according to age and health. Ideas that are similar, or which have been acquired at the same time, recall each other ; this is the association of ideas. The order, extent, and promptitude of this asso- ciation constitute the perfection of memory. Each object presents itself to the memory with all its qualities, or with all its accessory ideas. Intellect has the power of separating these accessory ideas of objects, and of com- bining those that are alike in several different objects under one general idea, the prototype of which nowhere really exists, nor presents itself in an isolated form ; this is abstraction. Every sensation being more or less agreeable or disagreeable, experience and re- peated essays show promptly what movements are required to procure the one and avoid the other ; and with respect to this, the intellect abstracts itself from general rules to direct the will. An agreeable sensation being liable to consequences that are not so, and vice versd, the subsequent sensations become associated with the idea of the primitive one, and modify the general rules abstracted by the intellect; this is prudence. From the application of rules to general ideas, result certain formule, which are aiterwards adapted easily to particular cases; this is called reasoning—ratiocination. A lively remembrance of primitive and associated sensations, and of the impressions of pleasure and pain that attach 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 recall the general ideas which they represent. These associated images are cece a a er. 30 INTRODUCTION. what are called signs ; their assemblage is a language. When the language is com- posed of images that relate to the sense of hearing or sound, it is termed speech. When its images relate to that of sight, they are called hieroglyphics. Writing is a suite of images that relate to the sense of sight, by which we represent elementary sounds; and, in 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 distinctly in the memory, and to recall without con- fusion, an immense number, and furnishes to the reasoning faculty and the imagina- tion innumerable materials, and to individuals the 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: this is the distinctive character of human intelligence.* The most perfect animals are infinitely below man in their intellectual faculties ; but it is, nevertheless, certain that their intelligence performs operations of the same kind. They move in consequence of sensations received, are susceptible of durable affections, and acquire by experience a certain knowledge of things, by which they are governed in- dependently of actual pain and pieasure, and by the simple foresight of consequences. When domesticated, they feel their subordination, know that the being who punishes them may refrain from doing so if he will, and when sensible of having done wrong, or behold him angry, they assume a suppliant 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 janguage, which, it is true, expresses only their momentary sensations; but man teaches them to understand another, much more complicated, by which he makes known to them his will, and causes them to exccute it. In short, we perceive in the higher animals a certain degree of reason, with all its consequences, good and bad, and which appears to be about the same as that of chil- dren before they have learned to speak. In proportion as we descend to the animals more removed from man, these faculties become enfeebled; and, in the lowest classes, we find them reduced to signs, at times equivocal only, of sensibility, that is to say, to a few slight movements to escape from pain. Between these two extremes, the degrees are endless. In a great number of animals, however, there exists a different faculty of intelli- gence, which is named instinct. This prompts them to certain actions necessary to the preservation of the species, but often altogether foreign to the apparent wants of individuals ; frequently, also, very complicated, and which, to be ascribed to intelligence, would suppose a foresight and knowledge in the species that execute them infinitely superior to what can be admitted. These actions, the result of instinct, are not the effect of imitation, for the individuals that perform them have often never seen them performed by others: they are not proportioned to the ordinary intelligence, but become more singular, more wise, more disinterested, in proportion as the animals belong to less elevated classes, and are, in all the rest of their actions, more dull and * Linnaus defined the human being to be a “ self-knowing animal ;” | bit itis doubtful whether any of them can mentally trace remote which is a bold assumption, taken either way.—En, causes, amid the complication of phenomena. It is with man in his + That is to say, they obviously remark coincidences and sequences; | least civilized state that they should be compared.—Ep, INTRODUCTION. 31 stupid. They are so truly the property of the species, that all its individuals perform them in the same way, without any improvement. Thus the working bees 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 wasps and the solitary bees also form very complicated nests, in which to deposit their eggs. From this egg issues a grub, which has never seen its (elo oD parent, which is ignorant of the structure of the prison in which it is confined, but which, once metamorphosed, constructs another precisely similar. In order to have a clear idea of instinct, it is necessary to admit that these animals ave innate and perpetual images or sensations in the sensorium, which induce them to h te and perpetual images or sensat tl hich induce them t act as ordinary and accidental sensations commonly do. _ that ever haunts them, and may be considered, in all that relates to instinct, as a kind of somnambulism. It is a sort of dream or vision Instinct has been granted to animals as a supplement for intelligence, to concur with it, and with force and fecundity, to the preservation, in a proper degree, of each species. There is no visible mark of instinct in the conformation of the animal; but intelli- gence, so far as has been observed, is in constant proportion to the relative size of the brain, and particularly of its hemispheres.* OF METHOD, AS APPLIED TO THE ANIMAL KINGDOM. After what we have said respecting methods in general, there remains to ascertain which are the most influential characters of animals, that should serve as the basis of their primary divisions. It is evident they should be those which are drawn from the “animal functions ; that is to say, from the sensations and movements ; for not only do both these make the being an animal, but they establish, in a manner, its degree of animality. Observation confirms this position, by showing that their degrees of developement 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 vege- of the nervous system do for the animal tative functions, as the brain and trunk * One of the most curious phenomena of instinct is the transmission of instilled habits by generation, as in the instance of high-bred pointer and setter dogs, often requiring no training to fit them for their particular modes of indicating game. Propensities are similarly hereditary in the human species; but innate knowledge, as a substi- tute for individually acquired experience, is peculiar to brutes, which, for the most part, are thrown upon their own resources, before they have had time or opportunities to gain the necessary information to serve as a guide for the regulation of their conduct. All the higher ani- mals, except the human species, appear to recognize their natural foes intuitively, to know even where their hidden weapons lie, also where they (and likewise themselves) are most vulnerable, and they endea- vour to use their own peculiar weapons before these are developed. If incapable of resistance, they commonly have recourse to stratagein ; thus a brood of newly-hatched partridges willinstantly cower motion- less at sight of an object of distrust, the intent of which must be, that the close similarity of their colour to that of the surface should cause them to be overlooked. Predatory animals, again, which immolate victims capable of dangerous resistance, instinctively endeavour always to attack a vital part, so as to effect their purpose speedily, and with least hazard to themselves ; but those which prey on feeble and de- fenceless animals attack indiscriminately. Many astonishing mani- festations of the instinctive faculty occur respecting the manner in which the food is obtained ; and in the ant and some rodent quadrupeds, which store up grain, the embryo of every seed is destroyed, to pre- vent germination, The seasonal migrative impulse which recurs in some animals is among the most incomprehensible of instinctive phenomena, as it is shown to be, in various cases, independent of food or temperature ; though the latter, in particular, exercises some influence on its de- velopement, as does also the state of the sexual organs in spring. The guiding principle of migration is equally mysterious,—that which enables a bird of passage to return periodically to its former haunts, to the same locality (both in winter and summer), which it had pre- viously occupied ; and the young also to the place of their nativity. This principle is farther evinced in the return of pigeons, &c. to their accustomed place of abode from indefinite distances, and by a straighter and more direct route than that by which they had been removed. It appears, likewise, to be manifested in somnambulism, and, perhaps, in some other affections of the human body ; but the sexual and parental instincts are those which are chiefly cognizable in civilized man- kind. One curious fact connected with the migrative propensity is, that the same species is sometimes permanently resident in one locality, and migratory in another. Thus the robin, which is stationary in Britain, leaves Germany in the autumn; which would seem to indi- cate that the erratic habit may have originated (in this instance) from necessity, and in course of time have become regular and transinis- sible, independently of external causes. Migratory animals, how- ever, may commouly be distinguished from others of the same genus, by their superior structural powers of locomotion.—Ep. 32 INTRODUCTION. functions. Now, we see these two systems degrade and disappear together. In the lowest of animals, where the nerves cease to be visible, there are no longer distinct fibres, and the organs of digestion are simply excavated in the homogeneous mass of the body. In insects, the vascular system disappears even before the nervous one ; but, in general, the dispersion of the medullary masses accompanies that of the muscular agents: a spinal chord, on which the knots or ganglions represent so many brains, corresponds to a body divided into numerous rings, and supported by pairs of members distributed along its length, &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 circu- lating system, should serve then for the basis of the primary sections to be made in the animal kingdom. We will afterwards ascertain, in each of these sections, what . characters should succeed immediately to these, and form the basis of the primary subdivisions. GENERAL DISTRIBUTION OF THE ANIMAL KINGDOM INTO FOUR GREAT DIVISIONS. If the animal kingdom be considered with reference to the principles which we have laid down, and, divesting ourselves of the prejudices founded on the divisions formerly admitted, we regard only the organization and nature of animals, and not their size, utility, the more or less knowledge which we have of them, nor any other accessory circumstances, it will be found that there exist four principal forms, four general plans, if it may be thus expressed, on which all animals appear to have been modelled, and the ulterior divisions of which, under whatever title naturalists may have designated them, are merely slight modifications, founded on the develope- ment 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 which most resemble him, the brain and the principal trunk of the nervous system are inclosed in a bony envelope, which is formed by the cranium and the vertebre : to the sides of this medial column are attached the ribs, and the bones of the limbs, which compose the framework of the body: the muscles generally cover the bones, the motions of which they produce, and the viscera are contained within the head and trunk. Animals of this form we shall denominate VERTEBRATE ANIMALS (Animalia vertebraia). * They have all red blood, a muscular heart, a mouth furnished with two jaws, placed one either before or above the other, distinct organs of sight, hearing, smell, and taste, situated 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 of the principal branches of the nervous system. On examining each of the parts of this great series of animals more closely, there may always be detected some analogy, even in those species which are most remote from one another; and the gradations of one single plan may be traced from man to the last of fishes. In the second form there is no skeleton ; the muscles are attached only to the skin, INTRODUCTION. 33 which constitutes a soft, contractile envelope, m which, in many species, are formed stony plates, called shells, the production and position of which are analogous to that of the mucous body; the nervous system is contained within this general envelope, together with the viscera, and is composed of several scattered masses, connected by nervous filaments, and of which the principal, placed over the cesophagus, bears the name of brain. Of the four senses, the organs of those of taste and vision only can be distinguished; the latter of which are even frequently wanting. A single family alone presents organs of hearing. There is always, however, a complete system of circulation, and particular organs for respiration. ‘Those of digestion and of the secre- tions are little less complicated than in the vertebrated animals. We will distinguish the animals of this second form by the appellation of Moxuuscous Animats (Animalia mollusca). Although the general plan of their organization is not so uniform, as regards the external configuration of the parts, as that of the vertebrates, there is always an equal degree of resemblance between them in the essential structure and the functions. The third form is that observed in insects, worms, &c. Their nervous system con- sists of two long chords running longitudinally through the abdomen, dilated at inter- vals into knots or ganglions. The first of these knots, placed over the cesophagus, and called brain, is scarcely any larger than those which are along the abdomen, with which it communicates by filaments that encircle the cesophagus like a collar. ‘The envelope of their trunk is divided by transverse folds into a certain number of rings, of ‘which the teguments are sometimes hard, sometimes soft, but to the interior of which the muscles are always attached. The trunk often bears on its sides articulated limbs, but is frequently unfurnished with them. We will bestow on these animals the term ARTICULATE ANIMALS (Animalia articulata). It is among these that the passage is observed ‘from the circulation in closed vessels, to nutrition by imbibition, and the corresponding transition from respiration in cir- cumscribed organs, to that effected by trachez or air-vessels distributed through the body. The organs of taste and vision are the most distinct in them, a single family alone presenting that of hearing. Their jaws, when they have any, are always lateral. Lastly, the fourth form, which embraces all those animals known under the name of Zoophytes, may be designated Rapiate Animas (Animalia radiata). In all the preceding, the organs of sense and motion are arranged symmetrically on the two sides of an axis. There is a posterior and an anterior dissimilar face. In this last division, they are disposed as rays round a centre; and this is the case, even when they consist of but two series, for then the two faces are alike.* They approximate to the homogeneity of plants, having no very distinct nervous system, nor organs of particular senses: there can scarcely be perceived, in some of them, the vestiges of a * M. Agassiz has expressed a different opinion. See Radiata.—Ep. 34 INTRODUCTION circulation; their respiratory organs are atmost always on the surtace of the body ; the greater number have only a sac without issue, for the whole intestine ; and the lowest families present only a sort of homogeneous pulp, endowed with motion and sensibility.* [The necessity,” writes Mr. Owen, “for a dismemberment of the Radiata of Cuvier, which Rudolphi justly calls a chaotie groupt, has been felt, and directly or indirectly expressed, by most naturalists and comparative anatomists.} It is impossible, indeed, to predicate a com- munity of structure in either the locomotive, excretive, digestive, sensitive, or generative systems, with respect to this division, as it now stands in the Régne Animal. * * * “Taking the nervous system as a guide, the Radiata of Cuvier will be found to resolve them- selves into two natural groups, of which the second differs in the absence or obscure traces of nervous filaments from the higher division, in which these are always distinctly traceable, either radiating from an oral ring, or distributed in a parallel longitudinal direction, according to the form of the body. “These different conditions of the nervous system are accompanied by corresponding modifications of the muscular, digestive, and vascular systems; and a negative character, appli- cable to the higher division of Cuvier’s Radiata, may be derived from the generative system.’’§ It is only in the lower-organized of these divisions, to which the term Acrite ANIMALS (Animalia acrita) has been applied by Macleay, also that of Protozoa and Oozoa by Carus (from the circumstance of its members being analogous to the ova or germs of the higher classes), that the alimentary cavity and sanguiferous canals are destitute of proper parietes, being simple excavations or passages in the granular pulp of the body: for in the Nematoneura (a name applied to the higher division of Cuvier’s Radiata by Owen), the digestive organ is provided with a proper muscular tunic, and floats in an abdominal cavity: and those classes which manifest a circulating system distinct from the diges- tive tube possess vessels with proper parietes, distinguishable into arteries and veins. No nematoneurous class presents an example of generation by spontaneous fision or gemmation, but these modes of reproduction are common in the acrite division. of the latter, however, are oviparous; and in a few the sexes are separate. | Some * Before my time, modern naturalists divided all invertebrated ani- | these various classes under three grand divisions, each of which is inals into two classes, the Insects and Worms. I was the first to attack this method, and presented another division,in a Memoir read before the Natural History Society of Paris, on the 10th of May, 1795, and printed in the Décade Philosophique,in which 1 marked the characters and limits of the Mollusks, Crustaceans, Insects, Worms, Echinoderms, and Zoophytes. I distinguished the red-blooded worms, or Annelides, in a memoir read before the Institute onthe 3lst of December, 1801. | And finally, in a Memoir read before the Institute in July, 1812, and | printed in the dnnales du Mus. d’Hist. Nat., tom, xix., 1 distributed | comparable to that of the vertebrate animals. + Synopsis Entozoorum, p. 572. t Lamarck observes :—‘‘ The Apathetic Animals,” (as he terms the Acrita,) “have been very improperly called Zoophytes ; as their nature is completely animal, and in no respect vegetable. The denomina- tion of Rayed Animals is also objectionable, as it applies only toa portion of them.—dAnim, sans Vert2bres, i. p. 890. § Cyclopedia of Anatomy and Physiology, Art. Acrita; from which the succeeding passages are also abridged.—Ep, i FIRST GREAT DIVISION OF THE ANIMAL KINGDOM. THE Fig. 1. VERTEBRATE ANIMALS. Tue bodies and limbs of these being supported by a frame-work composed of connected pieces moveable upon each other, they have the more precision and vigour in their movements: the solidity of this support permits of their attaining considerable size, and it is among them that the largest animals are found. Their more concentrated nervous system, and the greater volume of its central portions, impart more energy and more stability to their sentiments, whence result superior intelligence and perfectibility. Their body always consists of a head, trunk, and members. The head is formed by the cranium, which incloses the brain, and by the face, which is composed of the two jaws and the receptacles of the organs of sense. Their trunk is supported by the spine of tbe back and the ribs. The spine is composed of vertebrae moveable upon each other, of which the first supports the head, and which have an annular perforation, forming together a canal, wherein is lodged that medullary production from which the nerves arise, and which is called the spinal marrow. The spine, most commonly, is continued into a tail, extending beyond the hinder limbs. The ribs are semicircles, which protect the sides of the cavity of the trunk: they are articulated at one extremity to the vertebre, and are ordinarily attached in front to the breast-bone; but sometimes they only partly encircle the trunk, and there are genera in which they are hardly visible. There are never more than two pairs of limbs; but sometimes one or the other is wanting, or even both: their forms vary according to the movements which they have to execute. The anterior lmbs may be organized as hands, feet, wings, or fins; the posterior as feet, or instruments for swimming. Diz 36 VERTEBRATE ANIMALS. The blood is always red, and appears to have a composition proper for sustaining that energy of sentiment and vigour of muscles, but in different degrees, which correspond to the amount of respiration, from which originates the subdivision of the vertebrate animals 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. Certain species, however, have the eyes obliterated. The nerves reach the medulla through perforations of the vertebrae, or of the cra- nium: they all seem to unite with this medulla, which, after crossing its filaments, expands to form the various lobes of which the brain is composed, and terminates in the two medullary arches (véufes) termed hemispheres, the volume of which corre- sponds to the amount of intelligence. There are always two jaws, the principal motion of which is in the lower one, which rises and falls; the upper is oftentimes entirely fixed: both of them are almost always armed with teeth, excrescences of a peculiar nature, the chemical composition of which is very similar to that of bone, but which grows by layers and transudations ; one entire class, however, (that of birds,) has the jaws invested with horn*, and the group of tortoises, in the class of reptiles, is in the same predicament. The intestinal canal is continued from the mouth to the anus, undergoing various inflexions, and several enlargements and contractions; having also appendages, and receiving solvent fluids, one of which, the saliva, is discharged into the mouth: the others, which flow into the intestine only, have various names ; the two principal are the juices of the gland called the pancreas [or sweet-bread], and the bile [or gal/], which is the product of another very large gland, named the liver. While the digested aliment is traversing its canal, that portion of it which is proper for nutrition, and is termed the chyle, is absorbed by particular vessels, named lacteals, and carried into the veins; the residue of the nutriment of the parts is also carried into the veins by vessels analogous to the lacteals, and forming with them one same system, designated the /ymphatic system. The veins return to the heart the blood which has served to nourish the parts, to- gether with the chyle and lymph with which it has been renewed; but this blood is obliged to pass, either wholly or in part, into the organ of respiration, to regain its arterial nature, previous to being again dispersed over the system by the arteries. In the three first classes, this organ of respiration consists of lungs, that is, an assemblage of cells into which air penetrates. In fishes only, and in some reptiles while young, it consists of gills, or a series of laminz between which water passes. In all the vertebrate animals, the blood which furnishes the liver with the materials of the bile is venous blood, which has circulated partly in the parietes of the intestines, and partly in a peculiar body named the spleen, and which, after being united in a trunk called the vena porta, is again subdivided at the liver. * M. Geoffroy St. Hilaire has described a structure in the bill of birds which presents some approach to a dentary system, Ina foetus of a Parroquet nearly ready for hatching, he found that the margins of the bill were beset with tubercles arranged in a regular order, and having all the exterior appearance of teeth ; these tubercles were not, indeed, implanted in the jaw-bones, but formed part of the exterior sheath of the bill. Under each tubercle, however, there was a gelatinous pulp, j analogous to the puips which secrete tecth, but resting on the edve of the maxillary bones, and every pulp was supplied by vessels and nerve s traversing a canal in the substance of the bone. These tubercles form the first margins of the mandibles, and their remains are indicated by canals in the horny sheath, subsequently formed, which contain a softer material, and which commence from small foramina in the mar- gin of the bone. In certain other birds (as the Mergansers) also, the lateral edges of the bill are provided with horny processes or lamin secreted by distinct pulps, and analogous in this respect to the whale- bone lamina of the Whales, which are toothless Mammalia, as are also the ant-eaters and Monotremata: it is further remarkable that the rudiments of dentition occur in the fatus of the toothless Whales. —Ep. + The lymphatic vessels are also the media of cutaneous transuda- tiou.—Kp. VERTEBRATE ANIMALS. ay All these animals have a particular secretion, which is that of urine, and which is elaborated in two large glands attached to the sides of the spine of the back, and called kidneys: the liquid which these glands secrete, accumulates most commonly in a reservoir named the 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 fecundates 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 eggs. SUBDIVISION OF THE VERTEBRATE ANIMALS INTO FOUR CLASSES. We have seen to what extent vertebrate animals resemble each other: they present, however, four great subdivisions or classes, characterized by the kind or power of their movements, which depend themselves on the quantity of respiration, inasmuch as it is from this respiration that the muscular fibres derive the energy of their irritability. The quantity of respiration depends upon two agents: the first is the relative quantity of blood which presents itself in the respiratory organ in a given instant of time; the second, the relative amount of [free] oxygen which enters into the com- position of [or is dispersed through] the ambient fluid. The quantity of the former depends upon the disposition of the organs of respiration and of circulation. 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 respiratory organ before returning by the arteries; or they may be simple, so that a portion only of the blood is obliged to pass through the respiratory organ, the re- mainder returning to the body without having been subjected to respiration. The latter is the case with reptiles. The amount of their respiration, and all the qualities which depend on it, vary according to the quantity of blood which is thrown into the lungs at each pulsation. Fishes have a double circulation, but their organ of respiration is formed to execute its function through the medium of water; and their blood is only acted upon by that small portion of oxygen which is dissolved or mingled in water ; so that the quantity of their respiration is, perhaps, less than that of reptiles. In mammalians, the circulation is double, and the aérial respiration simple, that is, it is performed in the lungs only: their quantity of respiration is, therefore, 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 medium. But the quantity of respiration in birds is even superior to that of quadrupeds, since they have not only a double circulation and an aérial respiration, but also respire by many other cavities besides the lungs, the air penetrating throughout their bodies, and bathing the branches of the aorta, or main artery of the body, as well as those of the pulmonary artery.* Hence result the four kinds of progression to which the four classes of the vertebrate animals are more particularly destined. The quadrupeds, in which the quantity of * In Batrachian reptiles (frogs, newts, &c.), respiration is to a) effected by which is needed to develope the requisite nervous or vital certain extent performed over the whole outer skin; which, on this | energy, those animals of this group which in the adult state have account, requires to be always mvist. Hence, as there can be no | lungs and not gills, but which pass the winter in a torpid state under muscular action without previous respiration, the chemical change | water, are enabled to resuscitate in spring.—Ep. 38 VERTEBRATE ANIMALS. respiration is moderate, are generauy tormea to waik and run with precision and vigour ; the birds, in which it is greater, have the muscular energy and lightness necessary for flight; the reptiles, where it is diminished, are condemned to creep, and many of them pass a portion of their life in a state of torpor; the fishes, in fine, to execute their movements, require to be supported in a fluid specifically almost as heavy as themselves.* All the circumstances of organization proper to each of these four classes, and especially those which refer to motion and the external senses, have a necessary relation with these essential characters. The class of mammalians, however, has peculiar characters in its viviparous mode of generation, in the manner in which the foetus is nourished in the womb by means of the placenta, and in the mamme by which they suckle their young. The other classes are, on the contrary, oviparous; and if we place them together, in opposition to the first, there will be perceived numerous resemblances which announce, on their part, a special plan of organization, subordinate to the great general plan of all the vertebrates. | THE FIRST CLASS OF VERTEBRATE ANIMALS. MAMMALIA. Mammalians require to be placed at the head of the animal kingdom, not only because this is the class to which we ourselves belong, 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 together combined to produce a more perfect degree of intelligence,—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 in general designed for walking on the ground, but with vigorous and continued steps. Consequently, all the articula- tions of their skeleton have very precise forms, which rigorously determine their motions. Some of them, however, by means of lengthened limbs and extended membranes, raise themselves in the air; others have the limbs so shortened, that they can employ them with effect only in water; but they do not the more on this account lose the general characters of the class. * To descend to particular cases, however, it would appear that species may be framed on almost every type, even very subordinate types, for any particular mode of life. groups which they approximate in habit,—nought that can be regarded as an intentional or designed representation of them, as has some- Thus, to illustrate briefly, the | times been imagined: for it is evident, that if species based on two bats, which are true mammalians, are modified for aérial progression like birds ; and the whales, other mammalians, have a fish-like exterior, being designed to live exclusively in water: so there are birds which are utterly incapable of flight; some, as the ostrich, adapted to scour the plains, like a quadruped; others, as the penguins, whose only sphere of activity isin the water: the pterodactyle affords an ex- ample of a genus of flying reptiles, the fossil remains of which only have been discovered. Descending to lower groups, we find among birds, a genus of thrushes (Cinclus), which seeks its subsistence under water; and another of totipalmate water-fowl (Zachypetes), which neither swims nor dives. Such deviations, however, from the general ! | i ‘ character of their allied genera, have no intrinsical relation to the different plans of organization are respectively modified to perform the same office in the economy of nature, they must necessarily re- semble, to a certain extent, superficially, as a consequence of that adaptation ; while there are many cases also in each class which can- not well be represented in some others, as that of the mole among quadrapeds, which has no counterpart or correspondent group in the class of birds. Habit, or mode of life, has indeed nothing whatever ! to do with the physiological relations of organisms, which afford the only legitimate basis of classification ; and those special modifications to particular habits, which, occurring alike in any class, superinduce a resemblance in superficial characters only, constitute what has been well distinguished by the term analogy, as opposed to affinity —Ep. MAMMALIANS. 39 They have all the upper jaw fixed to the sxull, and the lower composed of two pieces only, articulated by a projecting condyle to a fixed temporal bone; the neck consists of seven vertebra, one single species excepted, which has nine*; the anterior ribs are attached in front, by cartilage, to a sternum formed of a certain number of pieces placed in a row; their fore-limb commences in a blade-bone, which is not articulated, but merely suspended in the flesh, often resting on the sternum by means of an intermediate bone, called a clavicle. This extremity is continued by an arm, a fore-arm, and a hand, the last composed of two ranges of small bones, called a wrist or carpus, of another range of bones termed metacarpus, and of digits or fingers, each of which consists of two or three bones, named phalanges. Excepting the Cetacea, they have all the first part of the hinder extremity fixed to the spine, and 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 fore part of the girdle, and the ischium, which constitutes the hind part. At the point of union of these three bones is situate 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 the foot, which is composed of parts analogous to those of the hand, namely, a tarsus, metatarsus, and digits or toes. The head of mammalians is always articulated by two condyles upon the atlas, or first vertebra. Their brain is composed of two hemispheres, united by a medullary layer termed the corpus callosum, containing two ventricles, and enveloping the four pairs of tuber- cles named the corpora striata, the thalami nervorum opticorum, or beds of the optic nerves, and the nates and testes. Between the optic beds is a third ventricle, which communicates with a fourth situated under the cerebellum, the crura of which always form a transverse prominence under the medulla oblongata, called the pons Varolii. Their 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 process and its simply cellular sclero- tica [or white]. In their ear, there is always found a cavity named the drum, or tympanum, which communicates with the back part of the mouth, by a canal termed the trumpet, or Eustachian tube: the cavity itself is closed externally by a membrane called the membrana tympani, and contains a chain of four little bones, named the hammer, anvil, orbicular, and stirrup bones; a vestibule, on the entrance of which rests the stirrup- bone, and which communicates with three semicircular canals; and, finally, a cochlea, which terminates by one passage in the drum, and by another in the vestibule. Their cranium subdivides into three portions: the anterior is formed by the two frontal and the ethmoidal bones ; the middle, by the parietal bones and the sphenoidal ; * The sloth is alladed to, in which, however, distinct rudiments of ribs are attached to the cighth and ninth, as shown in the above figure («, 4); so that, in reality, this constitutes no exception to the universal rule-—Ep. 40 VERTEBRATE ANIMALS. and the posterior, by the occipital. Between the occipital, the parietal, and the sphe- noidal, are interposed the temporal bones, part of which belong properly to the face. In the fcetus, the occipital bone divides into four parts ; the sphenoidal into halves, which subdivide into three pairs of lateral wings; the temporal into three, of which one serves to complete the cranium, another to close the labyrinth of the ear, and the third to form the parietes of its drum, &c. These bony portions [centres of ossifica- tion], which are still more numerous in the earliest period of foetal existence, are united more or less promptly, according to the species, and the bones themselves be- come finally consolidated in the adult.* Their face is essentially formed by the two maxillary bones, between which pass the nostrils, and which have the two intermaxillaries in front, and the two palate bones behind ; between them descends a single lamina of the ethmoidal bone, named the vomer ; at the entrance of the nasal canal are the bones proper to the nose ; to its external parietes adhere the inferior turbinated bones, which occupy its upper and posterior portion, belonging to the ethmoidal. The jugal or cheek bone unites on each side the maxillary to the temporal bone, and often to the frontal; lastly, the lachrymal bone occupies the inner angle of the orbit, and sometimes a part of the cheek. ‘These bones also present more numerous subdivisions in the embryo. Their tongue is always fleshy, and attached to a bone termed the hyoidal, which is - composed of several pieces, and suspended from the cranium by ligaments. Their lungs, two in number, divided into lobes, and composed of an infinitude of cells, are always inclosed without adhesion in a cavity formed by the ribs and diaphragm, and lined by the pleura; their organ of voice is always at the upper end of the windpipe ; a fleshy elongation, called the velum palati, establishes a direct com- munication between their larynx and nostrils. Their residence on the surface of the earth exposing them less to the alternations of heat and cold, their body has only a moderate kind of tegument, the hair or fur, and even this is commonly scanty in those of hot climates.}+ The cetaceans, which live entirely in water, are the only ones that are altogether deprived of it. The abdominal cavity is lined with a membrane called the peritoneum; and their intestinal canal is suspended to a fold of it, termed the mesentery, which contains numerous conglomate glands, in which the lacteal vessels ramify: another production of the peritoneeum, named the epiploon, hangs in front of and under the intestines. The urine, retained for some time in the bladder, is discharged, in the two sexes, with very few exceptions, by orifices in the organs of generation. In all mammalians, generation is essentially viviparous; that is to say, the fcetus, immediately after conception, descends [gradually] into the matrix, inclosed in its envelopes, the exterior of which is named chorion, and the interior amnios ; it fixes itself to the parietes of this cavity by one or more plexus of vessels, termed the placenta, which establishes a communication between it and the mother, by which it receives its nourishment, and probably also its oxygenation ; notwithstanding which, * Here it may be remarked that, descending in the series of verte- _ cessively assuming the conditions of this organ in fishes, reptiles, brates, the same is observable as in ascending to foetal life in the | birds, the lower and then higher groups of mammalians.—Ep. higher groups ; the progress of developement, in this and other re- | + In some monkeys from Sierra Leone, the most torrid reion in the spects, being arrested at different stages of advancement, according | world, the hair is much elongated, but thin and coarse, as if designed 1 to the class, order, and species: the brain for instance, in man, suc- | to protect them from the solar rays.—Eb, MAMMALIA. 41 the foetus of mammalians, at an early period, has a vessel analogous to that which contains the yolk in the oviparous classes, receiving, in like manner, vessels from the mesentery. It has also another external bladder named the allantoid, which communi- cates with the urinary one by a canal termed the wrachus. Conception always requires an effectual coitus, in which the fecundating fluid of the male is thrown into the uterus of the female. The young are nourished for some time after birth by a fluid peculiar to this class (the milk), which is produced by the mamme, at the time of parturition, and for as long a period as the young require it. Itis from the mamme that this class derives its name, and, being a character peculiar to it, they distinguish it better than any other that is external.* . DIVISION OF THE CLASS OF MAMMALIA INTO ORDERS. The variable characters which establish essential differences among the mammalia are taken from the organs of touch, on which depends their degree of ability or address, and from the organs of manducation, which determine the nature of their food, and are connected together, not only with all that relates to the digestive func- tion, but also with a multitude of other differences extending even to their intelligence. The degree of perfection of the organs of touch is estimated by the number and the mobility of the fingers, and from the greater or less extent to which their extremities are enveloped by the nail or the hoof. A hoof which envelopes all that portion of the toe which touches the ground, blunts its sensibility, and renders the foot incapable of seizing. The opposite extreme is where a nail, formed of a single lamina, covers only one of the faces of the extremity of the finger, and leaves the other possessed of all its delicacy. The nature of the food is known by the grinders, to the form of which the articula- tion of the jaws universally corresponds. For cutting flesh, grinders are required as trenchant as a saw, and jaws fitted like se ssors, which have no other motion than a vertical one. For bruising grain or roots, flat-crowned grinders are necessary, and jaws that have a lateral motion: in order that the crowns of these teeth should always be irregular, as in a mill, it is further requisite that their substance should be formed of parts of unequal hardness, so that some may wear away faster than others, Hoofed animals are all necessarily herbivorous, and have flat-crowned grinders, in- asmuch as their feet preclude the possibility of their seizing a living prey. Animals with unguiculated fingers are susceptible of more variety; their food is of all kinds: and, dependently of the form of their grinders, they differ greatly from each other in the mobility and delicacy of their fingers. There is one character with respect to this, which has immense influence on their dexterity, and greatly multiplies its powers ; it is the faculty of opposing the thumb to the other fingers for the purpose of seizing small objects, constituting what is properly termed a hand; a faculty which * We shall find, however, in the sequel some doubts on this sub- to be no nipples, simple pressure alone causing the fluid to exude. ject, as regards the family of Monotremata. [These doubts have | In the class of birds, a lacteal fluid is secreted by the crops of the since been removed, inasmuch as the lacteal glands have been de parrots and pigeons, which is disgorged into the throats of the young tected, with their secretion ; though, as in the cetaceans, there appear | when newly hatched.—Ep.] 42 VERTEBRATE ANIMALS. is carried to its highest perfection m Man, in whom the wnole anterior extremity is free, and capable of prehension. These various combinations, which rigidly determine the nature of the different mammalians, have given rise to the following orders :— Among the unguiculates the first is Man, who, besides being privileged in all other respects, has hands to the anterior extremities only ; his hinder limbs support him in an erect position. In the order next to Man,—that of the Quaprumana, there are hands to the four extremities. Another order, that of the Carnarta, has not the thumb free and opposable to the other fingers. These three orders have each the three sorts of teeth, namely, grinders, canines, and incisors. A fourth, that of the Ropenrra, in which the toes differ little from those of the Carnaria, is without the canines, and the incisors are placed in front of the mouth, and adapted to a very peculiar sort of manducation. Then come those animals whose toes are much cramped, and deeply sunk in large nails, which are generally curved; and which have further the imperfection of want- ing the incisors. Some of them are also without canines, and there are others which have no teeth at all. We comprehend them all under the name EpEnrara. This distribution of the unguiculated animals would be perfect, and form a very regular series, were it not that New Holland has lately furnished us with a small collateral series, composed of the pouched animals [MarsurratTa], the different genera of which are connected together by the aggregate of their organization, although m their teeth, and in the nature of their regimen, some correspond to the Carnaria, others to the Rodentia, and others, again, to the Kdentata. The hoofed animals are less numerous, and have likewise fewer irregularities. The Ruminant1a compose an order very distinct, which is characterized by its cloven feet, by the absence of the incisors to the upper jaw, and by having four stomachs. All the other hoofed animals may be left together in a single order, which I shall call PacoyperMatTa or JumenTA, the Elephant excepted, which might constitute a separate one, having some distant relation to that of Rodentia. Lastly, those mammalians remain which have no posterior extremities, and whose fish-like form and aquatic mode of life would induce: us to form them into a particular class, if it were not that all the rest of their economy is precisely the same as in that wherein we leave them. These are the warm-blooded fishes of the ancients, or the Crracea, which, uniting to the vigour of the other mammalians the advantage of being sustained in the watery element, include among them the most gigantic of all animals. {Linneus reduced all mammalians to three great groups, Uneurcutata, Uneunata, and Murica ; terms which are at least convenient for their expressiveness, although the groups they represent intergrade, and in some instances invade each other, if too rigorously accepted. His order Primares, as extended to the Bimana, Quadrumana, and Cheiroptera of Cuvier, receives the approbation of most naturalists ; few regard the last as subordinate to the Carnaria, which is equivalent to Primates. Viewing Man zoologically, opinion is divided respecting the propriety of assigning . MAMMALIA. 43 him a separate ordinal station ; his rudimental structure according so nearly with that of the Quadrumana, of which type he presents the modification for ground habits and an upright attitude ; his more highly developed brain is merely a difference in degree. Conceding this much, he would require to be admitted into the same particular group as all other mammalians based on the same neat general plan of structure to that of the entire class; which special type is externally distinguished by pecu- liarities in the sexual organs, a system of organs of all others the least subject to be influenced by the general modification in reference to habit. It is thus that, after being necessarily included among the Mammalia, Man must next range with the other handed animals and the Bats, in a particular subdivision, which Linneus has named Primates. There would appear to be four distinct major groups of Primates :—the Catarrhini, composed of the Apes, Monkeys, and Baboons of the eastern hemisphere; the Platyrrhini, consisting of the anthropoid animals of America; the Strepsirrhini, or Lemurs (including Galeopithecus, and, perhaps, Cheiromys) ; and the Cheiroptera, or Bats, which last, varying most essentially in their dentition, according as they are frugivorous, sanguivorous, or insectivorous, afford a decisive proof that the dentary system alone, like any other single character considered apart from the rest, fails to supply an invariable indication of the affinities of an animal (as has sometimes been stated). We perceive no sufficient reason why the genus Homo should not range at the head of the Catarrhini, though as a distinct family—Hominide, as opposed to Simiade ; in accordance wherewith, the Primates present a tolerable series, from the summit of the animal kingdom to forms that are rather low in the class of mammalians. An analogous gradation is exhibited by the second grand division, which De Blain- ville has designated Secundates ; it is the Carnaria of Cuvier divested of the Bats. We prefer the latter appellation, as more in unison with the names of the succeeding orders ; and for the same reason would substitute Primaria for Primates. Our illustrious author, with a view to present some approximation to a linear suc- cession, has arranged the present series inversely, commencing with those least elevated in the scale, or the Jnsectivora. To this we cannot accede, as virtually implying an exploded principle. Considered as a carnivorous group, the Feline animals must be selected as the standard—most characteristic example*—of the order; but in its totality, without reference to especial modifications, the Dog has better claim to be placed at the head. Some curious analogies accordingly present themselves between the respectively highest animals of the two first orders. As a general, perhaps universal rule obtaining in consecutive groups when sufficiently extensive, the summit of the inferior displays a higher organization than the terminal members of the superior}; and this sometimes in a very remarkable degree, as shown in the present instance. A sort of parallelism may also frequently be observed between such members of two different ordinal types as are of a corresponding degree of eleva- tion in the scale of being: thus, the Shrews present certain characters of the Rodentia, without linking with them. It is on this principle, we suspect, that transitions appear eto occur in some instances, from one great type of structure to another; and a key is hereby supplied to the proper understanding of much that seems otherwise inexplicable. * The word type is often employed in this sense: we useitina } + A proposition which is sanctioned by the acquiescence of Cuvier, sumew Sat differcut one. | as shown by his remarks on linear arrangement. Vide preface, p. 7. 44 MAMMALIA. We have seen, in the Primaria, that particular plan of conformation so modified as to enable certain species to fly : in the Carnaria, the Seals afford an example of exclusive adaptation to aquatic habits. It could only have been the desire to maintain a sort of continuous succession, as in the former instance, which induced our author to range the Marsupiata next to the Carnaria ; for they are unquestionably the lowest-organized vf mammalians, whence their intrusion so high in the system of the class furnishes another proof of the impropriety of allowing undue importance to particular characters. An order which has a better claim to succeed the Carnaria, is that of the fish-like mammalians, or Cetacea; but, divested of the herbivorous genera ranged in it by Cuvier, which are strict Pachydermata. (It is scarcely necessary to repeat, that modifications which have reference to habit do not necessarily affect the essential relations of organisms). The Pachydermata follow, which, in their turn, must not be regarded as more nearly related to the last, because certain genera of them are analogously adapted for aquatic habits only. We feel compelled to reiterate this general principle, in order to preclude misconception ; the sound inference seems to be, that a tendency to general modification for aquatic habits prevails in this part of the system; which certainly helps to indicate what orders should be placed in contiguity, though still not of necessity, even admitting that many analogous cases may be cited in corroboration of a vague index being thus ~ afforded.* We prefer to arrange the Ruminantia next to the Pachydermata ; then the Edentata, and the Rodentia ; and last of all the Marsupiata, including the Monotremata of Cuvier, the formerly doubtful points concerning which are now, with slight reservation, finally set at rest. It will be perceived that this arrangement is tolerably in accordance with the ordinary cerebral developement, and consequent amount of intelligence, of the eight successive orders. Passing on to the Birds, we commence with a higher intellect (in the Parrots) than is manifested in either of the last three, or, perhaps, four orders ; which agrees with the general proposition stated at p. 43.] THE FIRST ORDER OF MAMMALIANS. BIMANA, OR MAN. Man forms but one genus, and that genus the only one of its order. As his history is more directly interesting to ourselves, and forms the standard of comparison to which we refer that of other animals, we will treat of it more in detail. We will rapidly sketch whatever Man offers, that is peculiar in each of his organic systems, amidst all that he has in common with other mammalians; we will describe his principal races and their distinctive characters; and finally point out the natural” order of the developement of his faculties, both individual and social. For an instance in point, see our remarks on certain conformities of structure observable in the two groups of Parrots and Hawks. ee BIMANA, OR MAN. 45 PECULIAR CONFORMATION OF MAN. The foot of Man is very different from that of Apes: it is large; the leg bears vertically upon it; the heel is expanded beneath; his toes are short, and but slightly flexible; the great toe, longer and larger than the rest, is placed on the same line with and cannot be opposed to them. This foot, then, is proper for supporting the body, but cannot be used for seizing or climbing*, and as the hands are unfitted for walking, Man is the only animal truly bimanous and biped. The whole body of Man is modified for the vertical position. His feet, as we have already seen, furnish him with a larger base than those of other mammalians; the muscles which re- tain the foot and thigh in the state of extension are more vigorous, whence results the swelling of the calf and buttock; the flexors of the leg are attached higher up, which permits of com- plete extension of the knee, and renders the calf more apparent. The pelvis is larger, which separates the thighs and feet, and gives to the trunk that pyramidal form favourable to equi- librium : the necks of the thigh-bones form an angle with the body of the bone, which increases still more the separation of the feet, and augments the basis of the body. Finally, the head, in this vertical position, is in eauilibrinm with the trunk, because its articulation is exactly under the middle of its mass. Were he to desire it, Man could not, with convenience, walk on all fours: his short and nearly inflexible foot, and his long thigh, would bring the knee to the ground; his widely sepa- rated shoulders and his arms, too far extended from the median line, would ill support the fore-part of his body; the great indented muscle which, in quadrupeds, suspends the trunk between the blade-bones as a girth, is smaller in Man than in any one among them; the head is heavier, on account of the magnitude of the brain, and the smallness of the sinuses or cavi- ties of the bones; and yet the means of supporting it are weaker, for he has neither cervical ligament, nor are the vertebra so modified as to prevent their flexure forward; he could therefore only maintain his head in the same line with the spine, and then, his eyes and mouth bemg directed towards the ground, he could not see before him ; the position of these organs is, on the contrary, quite perfect, supposing that he walks erectly. The arteries which supply his brain, not being subdivided as im many quadrupeds, and the blood requisite for so voluminous an organ being carried to it with too much violence, fre- quent apoplexies would be the consequence of a horizontal position. Man, then, is designed to be supported by the feet only. He thus preserves the entire use of his hands for the arts, while his organs of sense are most favorably situated for observa- tion. These hands, which derive such advantages from their hberty, receive as many more from their structure. Their thumb, longer in proportion than m the apes, increases the facility of seizing small objects ; all the fingers, except the annularis [and this to a certain extent], have separate movements, which is not the case in any other animal, not even in the apes. The nails, covering only one side of the extremities of the fingers, form a support to the touch, without in the least depriving it of its delicacy. The arms which support these hands have a solid attachment by their large blade-bone, their strong collar bone, &e. Man, so highly favoured as to dexterity, is not so with regard to strength. His swiftness in running is much inferior to that of other animals of his size; having neither projecting jaws, nor salient canine teeth, nor crooked nails, he is destitute of offensive armature; and the sides and upper part of his body being naked, unprovided even with hair, he is absolutely * It is certain, however, that by much practice from early youth, | with the anterior extremities imperfect, have illustrated this practi- the feot has been known to acquire an amount of dexterity in manual | cability the most remarkably. The influence of habit in training even operations, which it would not have been supposed capable of by those | the hand to perform its functions, will be appreciated by those who whose feet have been enveloped from the time they first walked in | cannot use their left hand with the same freedom as the right.—Ep. close investments. Individuals, in particular, who have been born 46 MAMMALIA. without deiensive weapons: lastly, he is of all anima.s taat which is latest to acquire the power necessary to provide for himself. é But this weakness even has been for him another advantage, in obliging him to have re- course to those internal means—to that intelligence which has been awarded to him in so high a degree. No quadruped approaches him in the magnitude and convolutions of the hemispheres of the brain, that is to say, of that part of this organ which is the principal instrument of the intel- lectual operations; the posterior portion of the same organ extends backwards, so as to form a second covering to the cerebellum ; even the form of the cranium announces this great size of the brain, as the smallness of the face shows how slightly that portion of the nervous system which influences the external senses predommates in him. ; These external senses, however, moderate as they all are in Man, are yet extremely delicate and well balanced. His two eyes are directed forwards; he does not see on two sides at once, like many quadru- peds, which produces more unity in the result of his vision, and concentrates his attention more closely on objects of this kind. The ball and iris of his eye vary but little, which re- strains the activity of his sight to limited distances, and to a determined degree of light. The conch of his ear, possessing but little mobility or extent, does not increase the intensity of sounds, notwithstanding which, of all animals, he best distinguishes their mtonation. His nostrils, more complicated than those of apes, are less so than those of all other genera; and yet he appears to be the only animal whose sense of smell is sufficiently delicate to be affected by unpleasant odours. Delicacy of smell must influence that of taste; and Man must have a further advantage, in this respect, at least over those animals whose tongues are covered with scales. Lastly, the nicety of his touch results, both from the delicacy of his teguments and the absence of all insensible parts, as well as from the the form of his hand, which is better adapted than that of any other animal for suiting itself to all the small mequalities of surfaces. Man has a particular pre-eminence in his organ of voice: of all mammalians, he can alone articulate sounds; the form of his mouth and the great mobility of his lips being probably the cause of this. Hence results his most invaluable mode of communication; for of all the signs which can be conveniently employed for the transmission of ideas, variations of sound are those which can be perceived at the greatest distance, and in the most varicus directions simultaneously. It seems that even the position of the heart and of the great vessels bears reference to the vertical carriage. The heart is placed obliquely on the diaphragm, and its point inclines to the left, thereby occasioning a distribution of the aorta differmg from that of most quadrupeds. The natural food of Man, judging from his structure, appears to consist principally of the fruits, roots, and other succulent parts of vegetables. His hands afford every facility for gathering them; his short and but moderately strong jaws on the one hand, and his canines being equal only in length to the other teeth, together with his tuberculated molars on the other, would scarcely permit him either to masticate herbage, or to devour flesh, were these condiments not previously prepared by cooking. Once, however, possessed of fire, and those arts by which he is aided in seizing animals or killing them at a distance, every living being was rendered subservient to his nourishment, thereby giving him the means of an indefinite multiplication of his species. Mis organs of digestion are in conformity with those of manducation ; his stomach is simple, his intestinal canal of mean length, his great intestines well marked, his ececum short and thick, and augmented by a small appendage, and his liver divided only into two lobes and one small one ; his epiploon hangs in front of the intestines, and extends into the pelvis. To complete this abridged statement of the anatomical structure of Man, necessary for this a BIMANA, OR MAN. 47 Introduction, we will add, that he has thirty-two vertebrae, of which seven belong to the neck, twelve to the back, five to the loins, five to the sacrum, and three to the coceyx. Of his ribs, seven pairs are united to the sternum by elongated cartilages, and are called true ribs; the five followmg pairs are denominated false ones. His adult cranium consists of eight bones ; an occipital (occipito-basilaire) ; two temporal; two parietal; a frontal; an ethmoidal, and a sphenoidal. The bones of his face are fourteen in number; namely, two maxillaries; two jugals, each of which joins the temporal to the maxillary bone of its own side by a sort of handle named the zygomatic arch ; two nasal bones ; two palatimes, behind the palate; a vomer, between the nostrils ; two turbimated bones of the nose in the nostrils; two lachrymals in the iner angles of the orbits, and the single bone of the lower jaw. Each jaw has sixteen teeth: four cutting incisors in the middle,two poimted canines at the corners, and ten molars with tuberculated crowns, five on each side, in all thirty-two teeth. Huis blade-bone has at the extremity of its spine or projecting ridge a tuberosity, named the acromion, to which the clavicle or collar-bone is connected, and over its articulation is a poimt termed the coracoid process, to which certain muscles are attached. The radius turus completely on the cubitus or ulna, owing to the mode of its articulation with the humerus. The wrist has eight bones, four in each range; the tarsus has seven; those of the remaining parts of the hand and foot may be easily counted by the number of digits. Enjoying, by means of his industry, uniform supplies of nourishment, Man is at all times inclined to sexual intercourse, without being ever furiously incited. His generative organ is not supported by a bony axis; the prepuce does not retain it attached to the abdomen ; but it hangs in front of the pubis: numerous and large veins, which effect a rapid transfer of the blood of his testes to the general circulation, appear to contribute to the moderation of his desires. The uterus of woman is a simple oval cavity; her mammz, only two in number, are situated on the breast, and correspond with the facility she possesses of supporting her child upon her arm. PHYSICAL AND MORAL DEVELOPEMENT OF MAN. The ordinary produce of the human species is but one child at a birth; for in five hundred cases of parturition, there is only one of twins, and more than that number is extremely rare. The period of gestation is nine months. A foetus of one month is ordinarily an inch in height; at two months, it is two inches and a quarter; at three months, five ches; at five months, six or seven inches; at seven months, eleven inches ; and at nine months, eighteen inches. Those which are born prior to the seventh month usually die. The first or milk teeth begin to appear a few months after birth, commencing with the incisors. The number increases in two years to twenty, which are shed successively from about the seventh year, to be replaced by others. Of the twelve posterior molars, which are permanent, there are four which make their appearance at four years and a half, four at nine years; the last four being frequently not cut until the twentieth year. The foetus grows more rapidly in proportion as it approaches the time of birth. The infant, on the contrary, increases always more and more slowly. It has upwards of a fourth of its height when born, attains the half of it at two years anda half, and the three fourths at nine or ten years. By the eighteenth year the growth almost entirely ceases. Man rarely exceeds six feet, and seldom remains under five. Woman is ordinarily some inches shorter. Puberty manifests itself by external signs, from the tenth to the twelfth year in girls, and from the twelfth to the sixteenth in boys. It arrives sooner in warm climates. Either sex very rarely produces before the epoch of this manifestation. Searcely has the body attained its full growth in height, before it commences to increase in bulk; fat accumulates in the cellular tissue. The different vessels become 48 MAMMALIA. gradually obstructed ; the solids become rigid; and after a life more or less prolonged, more or less agitated, more or less painful, old age arrives, with decrepitude, decay, and death. Man rarely lives beyond a hundred years ; and most of the species, either from disease, accidents, or merely old age, perish long before that term. The child needs the assistance of its mother much longer than her milk, whence results an education intellectual as well as physical, and a durable mutual attachment. The nearly equal number of individuals of the two sexes, the difficulty of supporting more than one wife, when wealth does not supply the want of power, intimate that monogamy is the natural condition of our species ; and as, wherever this kind of union exists, the sire participates in the education of his offspring, the length of time required for that education allows the birth of others, whence the natural perpetuity of the conjugal state. From the long period of infantile weak- ness results domestic subordination, and, consequently, the order of society at large, as the young persons which compose the new families continue to preserve with their parents those tender relations to which they have so long been accustomed. This disposition to mutual assistance multiplies to an almost unlimited extent those advantages previously derived by isolated Man from his intelligence ; it has assisted him to tame or repulse other animals, to defend himself from the effects of climate, and thus enabled him to cover the earth with his species. In other respects, Man appears to possess nothing resembling instinct, no regular habit of industry produced by innate ideas; all his knowledge is the result of his sensations, his observations, or of those of his predecessors. Transmitted by speech, increased by meditation, applied to his necessities and his enjoyments, they have given rise to all the arts. Language and letters, by preserving acquired knowledge, are a source of indefinite perfection to his species. It is thus that he has acquired ideas, and made all nature contribute to his wants.* There are very different degrees of developement, however, in Man. The first hordes, compelled to live by hunting and fishing, or on wild fruits, and being obliged to devote all their time to search for the means of subsistence, and not being able to multiply greatly, because that would have destroyed the game, advanced but slowly; their arts were limited to the construction of huts and canoes, to covering themselves with skins, and fabricating arrows and nets; they observed such stars only as served to direct them im their journeys, and some natural objects whose properties were of use to them ; they gained the dog for a companion, because he had a natural inclination for the same kind of life. When they had succeeded in taming the herbivorous animals, they found in the possession of nuinerous flocks a never-failing source of subsistence, and some leisure, which they employed in extending the sphere of their acquirements. Some industry was then employed in the construction of dwellings and the making of clothes; the idea of property was admitted, and, consequently, that of barter, together with wealth and difference of conditions, those fruitful sources of the noblest emulation and the vilest passions; but the necessity of searching for fresh pastures, and of obeying the changes of the seasons, still doomed them to a wandering life, and limited their improvement to a very narrow sphere. The multiplication of the human species, and its improvement im the arts and sciences, has * The numerous structural concurrences, all of which are required , necessary consequence of their imperfect means of communication), to promote the intellectual developement of mankind, are worthy of | and we perceive how immeus:, 15 indebted also to these ac- serious consideration with reference to the unaided faculties of other , cessories. animals. On the other hand, however, a duly deyeluped brain and commensu- For example, if the superior intelligence of Man were not secondea | rate intelligence are required to enable Man to avail himself of the by his admirable hands (so vastly excelling those of the mankey | advantages of his structure, for otherwise he appears doomed to re- tribe), by his efficient vocal organ, &¢., which are obvious to all as | main Stationary like a brute (as in the instance of the New Hol- mere physical conformations, indeed, but slight modifications of what | landers), even in the midst of civilization. There are also casualties, occur in other animals, —if, in short, he were reduced in these re- | as the general insecurity of life or property arising from situation or spects to the condition of the Dog, how effectually would the privation | misgovernment, which ordinarily suffice to repel the efforts of ad- operate to prevent that progressive advancement which, under exist- ; Vancement, even of the most intelligent races. ing circumstances, is achieved by the human race only. It would accordingly, then, appear, that the characteristic traits But, even grant to Man the use of all his organs, yet deprive him of | of human intellect are mainly due to the co-operation of extrinsic the accumulated experience of his predecessors, and all mental culture { causes, and to the accessory aids afforded by physical conformation. beyond the result of his incidental experience (which in brutes is a | —En. ve “f &e Germans Cuvier’ Animal Kingham. Bimang. HUMAN RAGE—CAUCASIAN, Fie. 2.—Crrcassi1an Branen. Portrait of a Circassian in the Suite of the Persian Ambassador in 1823, drawn by M. A. Collin. Fic. 4.—Scitavoman Brancw. Portrait of the Polish Count Lucas de Buin Opalinski. Fie. 1.—Inpian Brancu. An Indian Woman of Pondichery, after a portrait by M. Germger in “L’Inde Frangais.” Fic. 3.—Inpo-Germaneue Brancu. A Hindoo of Bramin Caste, Ram Moham Roy, after a portrait painted at Calcutta by M. Belnos. Fig. 5.—Skull of the Circassian. oe BIMANA, OR MAN. 49 only been carried to a high degree since the invention of agriculture and the division of the soil into hereditary possessions. By means of agriculture, the manual labour of a portion of society is adequate to the maintenance of the whole, and allows the remainder time for less necessary occupations, at the same time that the hope of acquiring, by industry, a comfortable subsistence for self and posterity, has given a new spring to emulation. The discovery of a representative of property, or a circulating medium, has carried this emulation to the highest degree, by facilitating exchanges, and rendering fortunes more independent and susceptible of being increased ; but by a necessary consequence, it has also equally increased the vices of effeminacy and the furies of ambition. In every stage of the developement of society, the natural propensity to reduce all knowledge to general principles, and to search for the causes of each phenomenon, has produced reflecting men, who have added new ideas to those already accumulated ; nearly all of whom, while know- ledge was confined to the few, endeavoured to convert their intellectual superiority mto the means of domination, exaggerating their merit in the eyes of others, and disguising the poverty of their knowledge by the propagation of superstitious ideas. An evil more irremediable, is the abuse of physical power ; now that Man only can injnre Man, he affords the only instance of a species continually at war with itself. Savages dispute their forests, and herdsmen their pastures; and make irruptions, as often as they can, upon the cultivators of the soil, to deprive them of the fruits of their long and painful labours. Even civilized nations, far from being satisfied with their enjoyments, carry on war for the prerogative of pride, or the monopoly of commerce. Hence the necessity of governments to direct the national wars, and to repress or reduce to regular forms the quarrels of individuals. Circumstances, more or less favourable, have restrained the social condition within limited degrees, or have promoted its developement. The glacial climates of the north of both contents, and the impenetrable forests of America, are still inhabited by the savage hunter or fisherman. The immeise sandy or salt plains of Central Asia and Africa are covered with a pastoral people, and innumerable herds : these half-civilized hordes assemble at the call of every enthusiastic chief, and overrun the cultivated countries that surround them, in which they establish themselves but to become enervated, and to be subjected in their turn to the next mvaders. This is the true cause of that despotism, which, in every age, has crushed the industry called forth under the fine climates of Persia, India, and China. Mild climates, soils naturally irrigated and rich in vegetables, are the natural cradle of agriculture and civilization ; and when their position is such as to afford shelter from the incursions of barbarians, talents of every kind are mutually excited; such were formerly (the first in Europe,) Italy and Greece; and such is, at present, nearly all that happy portion of the earth’s surface. There are, however, certain intrinsic causes which appear to arrest the progress of particular races, even though situated amidst the most favourable circumstances. i VARIETIES OF THE HUMAN SPECIES. Although the human species would appear to be single, since the union of any of its members pro- duces individuals capable of propagation*, there are, nevertheless, certain hereditary peculiarities of conformation observable, which constitute what are termed races. Three of these in particular appear eminently distinct: the Caucasian, or white, the Mongolian, or yellow, and the Ethiopian, or negro. The Caucasian, to which we belong, is distinguished by the beauty of the oval which forms the * It is now certain that this circumstance affords no proof of spe- ; which I have just witnessed, in the class of birds, of a brood of ducks, cifical identity, inasmuch as many nearly allied but obviously dis- | both parents of which were half mallard and half pintail (mas boschas tinct species produce hybrids that are prolific inter se: an instance of } and 4. acuta). See note to p. 19.—Ep. 50 MAMMALIA. head; and it is this one which has given rise to the most civilized nations,—to those which have gene- rally held the rest in subjection: it varies in complexion and in the colour of the hair. The Mongolian is known by his projecting cheek-bones, flat visage, narrow and oblique eyebrows, scanty beard, and olive complexion. Great empires have been established by this race in China and Japan, and its conquests have sometimes extended to this side of the Great Desert ; but its civilization has always remained stationary. The Negro race is confined to the southward of the Atlas chain of mountains: its colour is black, its hair crisped, the cranium compressed, and nose flattened. The projecting muzzle and thick lips evidently approximate it to the Apes: the hordes of which it is composed have always continued barbarous. The name Caucasian has been affixed to the race from which we descend, because tradition and the filiation of nations seem to refer its origin to that group of mountains situate between the Caspian and Black Seas, whence it has apparently extended by radiating all around. The nations of the Caucasus, or the Circassians and Georgians, are even now considered as the handsomest on earth. The principal ramifications of this race may be distinguished by the analogies of language. The Armenian or Syrian branch, spreading southward, produced the Assyrians, the Chaldeans, the hitherto untameable Arabs, who, after Mahomet, expected to become masters of the world; the Pheenicians, the Jews, the Abyssinians, which were Arabian colonies, and most probably the Egyptians. It is from this branch, always inclined to mysticism, that have sprung the most widely extended forms of religion. Science and literature have sometimes flourished among its nations, but always in a strange disguise and figurative style. The Indian, German, and Pelasgic branch is much more extended, and was much earlier divided: notwithstanding which, the most numerous affinities have been recognized between its four principal languages—the Sanscrit, the present sacred language of the Hindoos, and the parent of the greater number of the dialects of Hindostan; the ancient language of the Pelasgi, common parent of the Greek, Latin, many tongues that are extinct, and of all those of the south of Europe; the Gothic or Teutonic, from which are derived the languages of the north and north-west of Europe, such as the German, Dutch, English, Danish, Swedish, and their dialects ; and finally, the Sclavonian, from which are descended those of the north-east, the Russian, Polish, Bohemian, and that of the Vandals. It is by this great and venerable branch of the Caucasian stock, that philosophy, the arts and sciences, have been carried to their present state of advancement; and it has continued to be the depository of them for thirty centuries. It was preceded in Europe by the Celts, whose tribes, once very numerous, came by the north, and are now confined to its most western extremities; and by the Cantabrians, who passed from Africa into Spain, and have become confounded with the many nations whose posterity have intermingled in that peninsula. The ancient Persians originate from the same source as the Indians, and their descendants still present a very close resemblance to the nations of Europe. The Scythian and Tartar branch, extending first towards the north and north-east, and always wandering over the immense plains of those countries, returned but to devastate the happier abodes of their more civilized brethren. The Scythians, who, at so remote a period, made irruptions into Upper Asia; the Parthians, who there destroyed the Greek and Roman domination; the Turks, who there subverted that of the Arabs, and subjugated in Europe the unfortunate remnant of the Grecian people, were all offsets from this branch. The Finlanders and Hungarians are tribes of the same division, which have strayed among the Sclavonic and Teutonic nations. Their original country, to the north and eastward of the Caspian Sea, still contains inhabitants who have the same origin, and speak similar languages; but these are mingled with many other petty nations, variously descended, and of different languages. The Tartars remained unmixed longer than the others throughout that extent of country included between the mouth of the Danube to beyond the Irtisch, from which they so long menaced Russia, and where they have finally been subjugated by her. The Mongoles, however, have mingled their blood with that of the nations they conquered, many traces of which may still be found among the inhabitants of Lesser Tartary. It is to the east of this Tartar branch of the Caucasian race that the Mongolian race begins, whence it extends to the eastern ocean. Its branches, the Calmucks and Kalkas, still wandering shepherds, a. ee. ay ay: * es Vr “ne Kay Seed ann) lad « t 4 « a es _ ie ; 4 an Pi é Spee a WA re a ot ‘Si tr e,F a Oe lal rien ee eee PMNS re ie F440 Cauier’s Animal Ringhom. Biman, HUMAN RACE—MONGOLIAN. Fic. 1.—Sourn East or Asta Branon. = N\A PON ee Ni Mi LA My HIN Wy an J hi! h i) MWg ZZ Hr {i Ae Sel! HN Fi AN NNN Hy NN\ i} ili 6 | . *) Cockatoo i) i Crested Parrake Hyviace Maximilian's Macaw SCANSORES. 219 The Parrots have been arranged under many nanied subdivisions, the limits of which are mostly arbitrary, though several very natural groups are tolerably distinct. First, among the species with square tails, we may notice the great Black Cockatoos of Australia (Calyptorynchus, Vig.), large crested species, with heak of extraordinary strength, and very deep vertically. Their plumage is black, with some red or yellow on the tail; wings capable of vigorous flight; and food the seeds of the Eucalypti, with the juice of which fruit their bills are generally stained. Attempts to maintain them in captivity appear to have always hitherto failed.. The subdivision Corydon, Wavieri, is barely separable. The White Cockatoos (Plyctolophus, Vieillot), the species of which ( ce inhabit the Indian Archipelago and Australia, fall into two minor 1 vA) groups according to the form of the crest. Their disposition is sin- gularly gentle and affectionate, and several species are abundantly brought alive to Europe, where they are kept with much facility. Their singular antics and extraordinary grotesque movements are well known to all, The square-tailed species without crests constitute the restricted Parrots (Psittacus) of several authors, and are found in the old and new continents. They are generally esteemed for the facility with which 6 they learn to speak ; and the majority are gaily coloured: it is neces- sary, however, to subdivide them much further. One group, termed Nestor, is remarkable for the extraordinary elongation of the upper mandible, which far overhangs the lower : it is believed to be employed in hooking up bulbs: the members of this division are essentially crestless Cockatoos, allied to Pl. nasicus, and are also natives of Aus- tralia. The Love-birds (Psittacula, Kuhl), compose a beautiful group of species of diminutive size, wherein the tail is slightly graduated ; they Se _ \ ny are found in both continents, and are remarkable for having no Kw furcula. The Ring Parroquets (Paleornis, Vig.), have a very long pointed Fig. 105.—Sternum of Parrot. tail, and collar-like mark round the neck; they inhabit the Asiatic continent and islands, where there are many species. Australia produces numerous long-tailed Parroquets with more elongated tarsi, adapted for running on the ground; their tail-feathers are not pointed, and their colours are in general gorgeously variegated, and peculiarly mottled on the back. They constitute the Platycercus, Vig. and Horsf. Polyletes, Wagler, is allied, with pointed tail-feathers ; and Nymphicus refers to a small species related to the latter, but with the pointed crest of some Cockatoos. : The Maccaws (dra, Kuhl; Macrocercus, Vieillot), are long-tailed American species, which exceed all the rest in size, and are superbly coloured. The more characteristic have a large space of naked skin on the cheek, crossed by narrow stripes of short feathers. This bare space is gradually lost as they successively decrease in size, and they finally grade into the American Parroquets (Conwrus, Kuhl), one species of which (Ps. carolinensis, Auct.) is the only member of the Parrot group found northward of the tropic of Cancer. The Lories (Zorius, Vieillot),—are oriental species with square tails, and dense soft plumage, the colours of which are glowing in the utmost degree: beak in general comparatively feeble. Some allied birds are smaller, and have graduated tails, but are particularly distinguished by their extensile tongue having a circle of papille at the tip, adapting them to feed on the nectar of flowers: they are termed Lorikeets (Trichoglossus, Vigors). Tanygnathus, Wagler, includes some Lories with immense bills; and Coryphilus, a number of smail species, with slender bills, thick skin, and commonly purple colouring. Finally, Pezoporus, Uliger, and Nanodes, Vig. and Horsf., consist of some beautiful and delicate long-tailed species, which have also feeble bills, and tarsi somewhat elevated; they are known to seek their food chiefly on the ground.*] Among the Climbers are commonly placed two nearly allied African genera, which appear to me to have also some analogy with the Gallinacee, and with the Curassows in particular. They have the wings and tail of the latter, [their tail, however, consisting of only ten feathers, instead of fourteen], and like them inhabit trees; their beak is short, and superior mandible bulged, [or compressed and much elevated; the gape remarkably wide]; the feet have a short membrane which connects the external and front toes, though it is true that the outer toe is often directed backward, as observable in the Owls. Their nostrils are simply pierced in the corneous substance of the beak. the cutting edges of the mandibles are dentelated, ard the sternum (fig. 106), at least that of the Touraco, has not those two very deep emar- g:nations common to the Gallinacee. {Were we have another insulated group, which also comprises the Colies (p. 201), the anatomy of * We would enumerate some additional subdivisions, but their distinctive characters could not be given with the requisite brevity. 220 AVES. which at once indicates the propriety of arranging it in the present series, among which it is most nearly related to the Toucans. They have but twelve true cervical vertebra ; and the sternum, though singularly small, presents no affinity for that of the Poultry. The stomach is large and but slightly muscular, extending into the abdominal por- tion of the cavity of the body; and the intestines are short and without cceca. Unlike the Toucans, however, they possess a small gall-bladder; but the tongue, at least in some of them, is similarly barbed towards the tip. The feet have the first and fourth toes directed laterally, for which reason they commonly perch lengthwise on the horizontal branches of trees, which they perambulate longitudinally, clasping the bough with their two laterally disposed toes, while the others are directed forwards. Their movements are light and elegant in the extreme, a particular in which they differ remarkably from the Colies: they pass with an easy sailing flight from tree to tree; live in pairs or families according to the season; subsist almost exclusively upon fruits, and lay four delicate white eggs in the hollows of decayed timber]. Such are Tue Touracos (Corythaix, Mliger),— Fig. 106.—Sternum of Touraco. The beak of which does not ascend upon the forehead, [and is generally much compressed], and the head is adorned with an erectile crest. [Seven species are now known, the ground-colour of which is generally vivid-green, with some gorgeous crimson on the open wing. We should observe, that in all this group the feathers are very short upon the rump, being the reverse of what obtains throughout the Poultry. The head, however, is small, as in the latter.} Tur PLANTAIN-EATERS (Musophaga, Isert),— Are so named from the fruit on which they subsist, and are characterized by the base of the bill forming a disk, which covers part of the forehead. [They grade, however, into the former, the beak becoming more and more inflated, till in one species it for- cibly recaiJs to mind that of a Toucan. Another is of great size, approaching the stature of a Curassow, and has a splendid curled crest, resembling that of several of those birds. A third genus consists of Tuer Nape-crests (Chizeris, Swainson) ,— Which have a rounded beak approaching that of some Trogons, and hard and sombre mottled plumage, very unlike that of the others. Their exterior toe is more limited in its range outward by the con- necting membrane. Two species are well known, both from Africa, like all the preceding,—one the Phasianus Africanus of Latham. We here, at length, arrive at a sufficiently marked interruption of the series of the class of Birds, to be enabled to introduce some remarks on the affinities of the preceding orders, which we conceive might be arranged most naturally as follow. | I. Scansores, as limited to the Parrots. II. Raprores, or the Birds of Prey; which subainde into two thoroughly distinct sections. Il. Srrepirores, Screechers, consisting of all the remainder that are not organized upon the definite type of the Passerine. It is necessary to subdivide them first into three series, which might be designated Syndactyli, Zygodactyli, and Heterodactyli ; the two first of which names, however, do not rigidly apply im every instance, the groups bemg founded rather upon the aggregate of the organization, than upon any single character. 1. Syndactyli.—These, with the exception of the Motmots, are exclusively animal-feeders, hke the Raptores, to which they succeed; and even the Motmots subsist more upon animal than upon vegetable diet. They fall under two principal minor groups, which we term Buceroides and Halcyoides. SCANSORES. 221 The Buceroides are distinguished by a very short and heart-shaped tongue, a singly-emar- ginated sternum, and ten tail-feathers only ; mtestines short, and we believe always without coeca ; plumage never vividly coloured. In order to mark the degree of value of the two very distinct genera included, we conceive it necessary to indicate the Hornbills by the term Appendirostres, and the Hoopoes by that of Arculirostres. Both are peculiar to the eastern hemisphere. The Halcyoides have a doubly-emarginated sternum, twelve tail-feathers, and, with the sole exception of one group of Kingfishers, splendidly coloured plumage. They fall mto three tribes, viz., Cylindirostres, comprismg the Rollers, Bee-eaters, and Kingfishers, whieh have tongues similar to the foregoing, membranaceous stomachs, and no ececa; a thick skin, firm plumage (not moulted the first year), and great power of wing; nidificating m holes, and pro- ducing numerous shining white eggs, &e. ;—Angulirostres, composed of the Jacamars and Todies, which have thin, lengthened, lamina-like tongues, muscular gizzards, and great cceca, resembling those of the Owls; thin skin, soft plumage, feeble powers of flight, and which - produce coloured or speckled eggs, also in holes ;—and Serratirostres, or the Motmots,-whieh are intermediate to the Cylindirostres and the Toucans, (which commence the next series). The Angulirostres and Serratirostres are confined in their distribution to America; while the Cylindirostres, with the exception of a single subdivision of Kingfishers partly, are found only in the old world. 2. Zygodactyli—The members of this division likewise fall into two principal mimor groups, which may be termed Picoides and Cuculoides. The greater number subsist on mixed diet, and a marked predatory propensity is retamed by some. The Picoides have always (at least in every known instance) a doubly-emarginated sternum, comparatively muscular gizzard, and no cceca to the intestine. They all produce white eges, less spherical than those of the Syndactyli, (im which respect the latter approximate the Raptores, which precede them) ; and have an accessory plume to their feathers, more or less developed; their plumage being almost always adorned with vivid colours. It is im this group that the tongue is so variously modified, in the Toucans, Woodpeckers, &e. To bring the species as near as possible together, they may be arranged into two tribes, viz., Leviros- tres, consisting of two very distinct families,—that of the Toucans, and that of the Touracos and Colies; and Cuneirostres, comprehending the Woodpecker family (which includes the Honeyguides), and that of the Barbets. The Toucan and Touraco families are respectively peculiar to the old and new worlds, the latter, with the sole exception of two or three Collies, to Africa ; the Woodpeckers are generally diffused, excepting in Australia; and members of the Barbet family are found in the warm regions of both hemispheres. The Cuculoides have a comparatively lax stomach, and invariably great coeca, whieh when- ever they occur throughout the Strepitores are always of the same proportional dimensions and form as those of the nocturnal Birds of Prey: their colours, excepting in one group of Cuckoos, are never bright; and they have no trace of an accessory plume to the feathers : the greater number lay coloured or speckled eggs, and many construct inartificial nests in bushes, (all the preceding genera, save the Colies only, resorting to holes for that purpose). A great proportion of them have the outer and middle toes more or less directed laterally. They fall under two families only, that of the Courols, Barbacous, and Puff-birds, which have twelve tail-feathers, and that of the Cuckoos, which have only ten or fewer, and which might be again naturally distributed into several supergeneric divisions, or subfamilies. Of these, we can only remark, that that which comprises the parasitic species is peculiar to the old world. 3. Heterodactyli—tThis group consists of Birds the great majority of which are mainly insectivorous, and take their food on the wmg. They are generally endowed, therefore, with considerable power of flight, have a wide gape, and short feet, rarely adapted for progression. The only zygodactyle family of them has the toes differently disposed from those of all other 222 AVES. yoke-footed genera. The species which possess coeca closely accord with the Cuculoides in their anatomy, but all of them possess the accessory plume to the clothing feathers, in which they differ from that group. We subdivide them into Trogonoides and Cypseloides. The Trogonoides consisting of the Trogons only, it will be sufficient to refer to the generic head (p.216). They have twelve tail-feathers. Tie Cypseloides have only ten. They divide into two tribes, which may be termed Parvi- rostres, containing the family of Podargues and Moth-hunters, nocturnal species with great coeca, and which lay mottled eggs; and Tenuirostres, comprising the two distinct families of the Swifts and Humming-birds, which have no cceca, and lay white eggs, the last-named family differing remarkably from all the preceding Strepitores in having a complicated inferior, larynx, which character obtains throughout the next order, without a smgle known exception. Although the foregoing long series of groups, more or less subordinate, evince a decided mutual affinity and tolerably regular successionship, to those who have practically studied them, we have been unable to detect a single character that will apply to all, and the only one which. approximates to being general, consists in the lower larynx being provided with only the sterno-tracheal pair of muscles, save in the single family of the Humming-birds : hence these birds are unable to inflect the voice, and sing; and they are generally very inferior in intelligence and docility to the members of either of the three other orders with which we are now engaged ; the Picoides and Hoopoes constituting the chief exceptions to this generalization. Linnzeus obtained a glimpse of their distinctness from the Passerine, when he instituted his ordina! divisions Pice and Passeres; but he fell into error in assigning a position among the former to the Crows, which alone could have induced Cuvier to remark that he could discover no distinctive character to separate the Pice and Passeres of his great predecessor. The series of Strepitores can accordingly be defined only by negative characters, derived principally from comparison of them with the Passerine. Perhaps the most remarkable fact connected with their anatomy, consists im the cceca being invariably either altogether absent, or, if present, developed to a considerable but fixed size, which never varies; this diversity being found to exist in groups that are nearly allied, as in the Swifts and Moth-hunters, the Kingfishers and Todies, &c. IV. Canrores, or the restricted Passerine.—It is impossible for a greater contrast to be afforded than is furnished by this ordinal division and the preceding one. Although com- prismg many more species and received generic divisions than the three foregoing orders collectively, there is absolutely no essential difference of structure perceptible throughout the whole immense series; the only differences consisting in the degrees of developement of parts common to all : the peculiar type of skeleton, digestive and vocal organs, &c. beg invariably one and the same, just as the Humming-bird or Parrot model is analogously varied, in a minor degree. There are no subdivisions equivalent to those which have been indicated as famihes even of the Strepitores, however the beak may vary in magnitude and form; the most dissi- milar beaks being often unaccompanied by other marked diversities, so that a dead specimen deprived of its head, although at the first glance it might be referred with certainty to the present order, could only in a few instances be assigned, even on anatomical examination, to any particular group of it, and the plumage and style of colouring would even then afford the surest indication of its affinities, in the great majority of cases. In the Strepitores, on the contrary, any one organ, and very commonly a single ordinary clothing feather, would suffice to indicate the very genus from which it had been taken: the varieties in the form of the sternal apparatus may be cited as one illustration of the considerable diversities observable in the whole structure of the Strepitores; whereas a single sternal apparatus (fig. 86, p. 178), we have deemed fully adequate to represent the form of this important portion of the skeleton throughout the amazingly extensive series of the present division.* There are, in fact, no * The sternal apparatus of numerous genera of Cantores are beautifully figured in Mr, Yarrell’s History of British Birds. GALLINA. 223 characters of dichotomous application, till we descend to mmute particulars, such as the sea- sonal and progressive changes of plumage, the system of coloration, character of the eggs, Xe. and these require to be carefully and extensively studied, in order to extricate the Cantores from their present heterogeneous state of artificial arrangement, which, like most other classi - fications based on the variations of a single organ (the beak), has induced a variety of approxt- mations at variance with natural affinity. To detail our own views on the arrangement of this great order, would require more space than the nature of the present work would allow; it must suffice, therefore, to refer to the few hits which have been given in the details of the various genera. The four orders here indicated have a vague general character in common, which is not easy to define or even express : it partially consists in the magnitude of the head, as compared with the subsequent divisions generally; and’ a hind toe being always present, on the same plane with those in front, the great majority of them perch and traverse the boughs of trees with comparative facility, while the remainder are too obviously allied to admit of separation |. THE FOURTH ORDER OF BIRDS,— THE POULTRY, (GaLuina, Lin.)— Are so named from their affinity to the Domestic Cock, in common with which they have generally the upper mandible vaulted, the nostrils pierced in a large membranous space at the base of the beak, and covered by a cartilaginous scale.» Their heavy carriage, short wings, and bony sternum (fig. 107), diminished by two emarginations so wide and deep that they occupy nearly its whole lateral portion, its crest being ob- liquely truncated in front, so that the sharp edge of [an appendage to] the fourchette is only joined to it by hga- ment, are circumstances which, by greatly impairig the force of the pectoral muscles, render their flight laborious. The tail has generally fourteen, and sometimes eighteen, quill-feathers. Their inferior larynx is very simple, so that \\ none of them can sing. They have an extremely muscular v gizzard, and [most generally] a large [globular] crop. If we except the Curassows, they lay and incubate on the ground, on a few carelessly arranged stems of straw or grass. Each male has ordinarily several females, and takes no sort of trouble either with the nest or young ones, which are generally very numerous, and, in most cases, are able to run as soon as they quit the shell. [We should observe, that exceptions occur to almost all a a se these generalizations in the course of the series, which will be pointed out as they arise. In the polygamous species, the male is always larger and more gaily coloured than the female ; while in such as are monogamous, (as Ptarmigan and Par- tridges,) the sexes nearly or quite resemble, both in size and colour. This diversity is appa- rent in some species that are otherwise closely allied together. The head is very small, as compared with the members of the preceding orders generally; and the number of cervical vertebrz is irregular and always greater. | The Poultry constitute, for the most part, a very natural family, remarkable for having fur- nished us with the greater number of our farm-yard fowls, and with much excellent game. Their anterior toes are connected at base by a short membrane, the edges of which are dente- AVES lated; and they can only be subdivided upon characters of trivial import, drawn from some of the appendages of the head. In order to avoid, however, an excessive multiplication of groups, we associate with them certain genera the toes of which have no connecting membrane, and one (that of the Pigeons) which links the Poultry with the Passerine, the others (such as the Hoazin) presenting a slight approach to the Touracos ; [very slight and superficial i both instances ]. Tue Curassows (Alector, Merrem)— Are large Poultry-birds of South America, which somewhat resemble Turkeys, and have a broad and rounded tail, composed of large stiff quills, [fourteen in number]. Several of them possess a singular conformation of the trachea. They live in the woods, feed on buds and fruit, perch and nestle upon trees, [their hind-toe being on the same plane with those in front], and are very sociable and easily domesticated. [The sternum has its inner emargination less deep than in other Poultry]. Gmelin and Latham have divided them into Curassows and Guans, but upon very indeterminate characters. We subdivide them in the following manner :— Tue Curassows, properly so called, (Crax, Lin.),— Have a strong beak, its base surrounded by a skin, sometimes brightly coloured, in which the nostrils are pierced; and their head is adorned with a crest of long, erectible, narrow feathers, curled at the tips. Their size is that of a Turkey, and hke the members of that genus they fly up into trees. They are bred in a domestic state in America, and individuals have been received from that country so variously coloured, that we hesitate about characterizing the species. The most common, or the Yellow-billed Cu- rassow (C7. alector, Lin.), is black, with a white belly, and cere of the beak brilliant yellow. The trachea makes but one slight curve before it enters the breast. Some, as Cr. globicera, Lin., have a larger or smaller globular tubercle at the base of the beak. Tue Pauxt (Ourax, Cuv.)— Have a shorter and thicker bill, and the membrane at its base, as well as the greater part of their head, is covered with short dense plumage resembling velvet. The most common of them, or the Galeated Pauxi (Cr. pauxi, Lin.), has an oval tubercle at - the base of the beak, of a light blue colour and agi Sw ; stony hardness, almost as large as the head. This PSS ays 1 *)\ PS bird is black, with the lower part of the belly, and tip of tail, white. It nestles on the ground, and its native country is not known with precision. The trachea descends on the right side beneath the skin to behind the sternum, where it turns to the left, and ascends to enter the thorax through the fourchette: its rings are all compressed. Another species (Cr. galeata, Lath. ; Cy. tomentosa, Spix), has a red salient crest on the beak, instead of the tubercle. Fig. 108.—The Yellow-billed Curassow, Tue Guans (Penelope, Merrem)-— Have a more slender beak than the others, and the space around the eyes naked, as is also the throat, which is mostly susceptible of inflation. So many varieties of colour are found among them, that it is difficult to trace the limits of the various species. Those especially which have a crest, are extremely variable. [The size is in general much less than in the others, and form more slender: the naked parts are often beautifully coloured]. The trachea, at least in the crested species, descends under the skin far behind the posterior edge of the sternum, ascends, is again flexed, and then continues its course towards the fourchette, through which, as usual, it gains access to the lungs. In one crestless species (Pen. marail, Tem.), greenish-black, with a fulvous belly, (which appears very distinct,) the trachea forms in both sexes a curve at the upper part of the sternum, before it enters the lungs. Tue Parraavas (Ortalida, Merrem)— Merely differ from the Guans in having no naked skin about the head. One species only is known, of a bronzed brown above, whitish gray beneath, and rufous on the head, (the Ca- GALLINE. . 225 traca, Buffon; Phasianus motmot, Gmelin; Ph. parraqua, Lath). The cry of this bird is very loud, and articu- lates its name. The trachea of the male descends beneath the skin as low as the abdomen, and then ascends to enter the thorax. With these different Curassows has been generally associated THE Hoazin (Cpisthocomus, Hofmansegg,)— An American bird, which has the same port, and a short and thick bill, with nostrils pierced in its corneous substance, without any membrane. The head is adorned with an occipital crest of long fea- thers, very narrow and thinly barbed ; and what distinguishes it from all the true Poultry, is the total _ absence of membrane between the toes. This bird is the Phasianus cristatus, Lin. ; of a greenish-brown, variegated with white above, the front of the neck and tip of the tail fulvous, and the belly chestnut. It is found in Guiana, perching along the margin of inundated places, where it subsists on leaves and the seeds of a species of Arum. Its flesh smells strongly of castor, and is only employed as a bait for particular fishes. It forms a genus very distinct from any other among the Poultry, and when its anatomy is known, may become the type of a particular family. [This very curious bird is perhaps the most insulated species of the whole class: its eyelashes, and reticulated tarsi, help to separate it externally from the Poultry ; and its anatomy is altogether unique, exhibiting a peculiar adaptation for deriving nutriment exclusively from foliage. The crop, of enormous dimensions, hollows out, as it were, the pectoral muscles and anterior portion of the sternal keel, occupying a great heart-shaped cavity, and extending backward half-way along the trunk and at least four-fifths the length of the sternal apparatus ; it receives the superior portion of the cesophagus on the left side, and on the right is succeeded by an inflated canal, five inches and a half long, constricted like the human colon, and terminated by the proventriculus, to which follows the gizzard, which latter is no bigger than an olive, with its muscular coat scarcely thickened ; the intes- tines are moderately long, and cceca aninch. The sternal crest, so deeply cut away in front, forms a slight ridge anteriorly, which is continued forward into a very long bony apophysis, that is soldered with the furoula; the hindward emarginations are inconsiderable, the exterior pair being commonly reduced to a foramen, or even quite ossified. This bird is not naturally wild, and is observed in small flocks, which commonly perch side by side on some branch, always in marshy situations.* It appears to have only ten tail-teathers. We now arrive at the normal series of Poultry-birds, which have the hind-toe small and elevated. | THE PEeArowt (Pavo, Lin.),— So named (Paon) from their cry, and which are characterized by a crest of peculiar form, and by the tail-coverts of the male extending far beyond the quills, and being capable of erection into a broad and gorgeous disk. The shining, lax, and silky barbs of these feathers, and the eye-like spots which decorate their extremities, are well known to every one, as exemplified in The Indian Peatfow] (P. indicus, Lin.), the head of which is adorned with an aigrette of narrow vertical feathers, widened at the tips. This superb bird, originally from the north of India, [where it still exists abundantly in a state of nature], was introduced into Europe by Alexander. The wild specimens even surpass the domestic ones in brilliancy. The blue extends over the back and wings, instead of the common barred markings; and their train is stilllonger. [We have seen domestic Peacocks with these characters, which however are not attained by the greater number; and have also observed wild-shot birds like the ordinary breed, which it may be suspected had not acquired their final colouring; the developement of which would seem to be generally arrested in the former, so much so that we have seen an individual more than eighteen years of age, that did not differ from the common farin-yard specimens]. The Japanese Peafowl (badly named by Linneus P. muticus t, as it possesses spurs), is a distinct species, the aigrette of which is composed of long and narrow feathers; its neck is green instead of blue, and undated or gilded: train scarcely differing from that of the other. [The additional species ranged by the author among the Peafowl are distinct enough, and now generally known as Tue Prea-pHEasants (Polyplectron, Tem.). They are much smaller, and particularly remarkable for the tarsi of the male bearing two or more spurs.] The tail-coverts, which do not extend beyond the tail, and are webbed in the ordinary manner, have two brilliant metallic spots, and the wing-tertials have sometimes single ones. (Three or four species are known, from the mountains of eastern Asia ] THE Impeyan (Lophophorus, Tem.). The head surmounted by an aigrette like that of a Peafowl, and a similar flat tail, the coverts of which, * L'Herminier, in Annales des Sciences Naturelles for 1837. | which was afterwards continued, this bird having no harsh cry like + We suspect that this name originated in a misprint for mutys, | the other.—Ep. AVES. however, are not prolonged. It also resembles the Peafowl in the brilliancy of the colours of the male: circumference of the eye, and even the cheeks, naked, as in the Pheasants, and the tarsi armed with stout spurs. [The upper mandible very much overhangs the under one, as observable in a less degree in the Pheasants generally, enabling this bird to root up bulbs with facility. ] We know but one species, from the mountains of the north of India, the Resplendent Impeyan (L. refulgens, Tem.; Phasianus Impeyanus, Lath.). Size of a [small] Turkey, and black; the crest and dorsal plumage of changeable colours, reflecting tints of gold, copper, sapphire and emerald: tail-feathers chestnut-rufous, [and the rump white]. The female and young are brown, dashed with grey and fulvous. Tue Turkeys (Meleagris, Lin.)\— Have the head and upper part of the neck invested with a naked, mammellated skin; an appendage under the throat, and another conical one on the forehead, which becomes inflated and prolonged when the bird is excited by passion, when it hangs over the beak. On the lower part of the neck in front, the adult male has a tuft of very long pendent bristles; the coverts of the tail, shorter and more stiff than in the Peafowl, can be expanded in like manner into a fan. The males have weak spurs, [and are the only American Poultry-birds wherein a trace exists of those appendages]. But one species was known for a long time, the Common Turkey (J. gallipavo, Lin.). It was brought from North America during the 16th century, and was soon diffused throughout Europe, where it continues to be reared for the excellency of its flesh, its great size, and the facility with which it is bred. The Wild Turkeys vastly exceed the domestic breed in brilliancy, and are of a greenish-brown, glossed with copper reflections. A second, however, has been recently described, the Ocellated Turkey (M. ocellata, Cuv.), which approximates the Peafowl in the splendour of its colours, and by the disks of sapphirine-blue, inclosed by circles of gold and ruby-red, which adorn the tail-coverts. It was captured in the Bay of Honduras. [We may here introduce a large Poultry-bird of New Holland, THE VULTERN (dlectura, Gray),— Which has been strangely arranged by some authors among the Vultures, on account of its bald neck. From the Poultry generally, it is distinguished by the shortness of the downy plumage of the rump, as in the Touracos; its hind-toe is large, and on the same plane with those in front, the same as in the Curassows, like which it is also destitute of spurs; but its tail-feathers are eighteen in number. One species only is known (A. Lathami, Gray), entirely of a dusky colour, the feathers of the under-parts tipped with whitish. ] Tue Prnrapvos (Numida, Lin.), Or Guinea-fowl, have a naked head, and fleshy wattles below the cheeks, a short tail, and the skull generally surmounted by a callous crest. Their feet are without spurs; the tail short and pendent, so that the long feathers of the croup impart a rounded figure. The common domestic species (NV. meleagris, Lin.), originally from Africa [the indigenous habitat of all], has a slate-coloured plumage, everywhere speckled with round white spots [of different sizes]. Its noisy and querulous disposition render it an incommodious species in poultry-yards, although its flesh is excellent. In the wild state, they live in large flocks, and prefer the neighbourhood of marshes. (Three or four others are known, of which N. vulturina, Gould, is the most beautiful, having pointed purple feathers on the lower part of the neck; the body-plumage of all being nearly similar. The Crested Pintado (N. cristata, Pallas), is very remarkable for the appendage to the furcula forming a sort of cup, in which the trachea undergoes a convolution. No trace of this structure exists in the common species. ] The great genus of Purasants (Phasianus, Lin.)— Is characterized by partly naked cheeks, covered with a red skin, and by the tectiform tail, the feathers of which are variously disposed. We first distinguish among them Tur Fow ts (Gallus, Cuy.),— The head of which is surmounted by a vertical fleshy comb, and the inferior mandible furnished on each side with fleshy wattles. Their tail-feathers, fourteen in number, are elevated on two vertical planes, placed back to back; the coverts of that of the male are prolonged to form the arch over the tail proper. The species so common in our poultry-yards, [absolutely without a special English name] (Ph. gallus, Lin.), varies endlessly in colour, and very much in size: there are races wherein the fleshy comb is replaced by a crest of reverted feathers ; some in which the tarsi and even the toes are feathered ; another in which the crest, wattles, and periosteum of the whole skeleton are black ; and some monstrous kinds which have hereditarily five and even six toes to each foot. GALLINZ. 2 to ~T Several wild species are also known, as that of Sonnerat (Gal. Sonneratii, Tem.), which is very remarkable for the neck feathers of the male, the stems of which widen into three successive disks of a horny nature. The comb of the same sex is dentelated. This species inhabits the Ghauts of Hindostan. M. Leschenhault has procured two others from Java: one (G. Bankiva, Tem.), with a dentelated crest like the preceding; all the feathers of the neck long, pendent, and of the most beautiful golden red: it appears to me to bear the greatest resemblance to our domestic races: the other (PA. varius, Shaw; G. furcatus, Tem.), is black, with a copper-green neck, speckled with black, its crest plain, and a kind of small dewlap instead of wattles. THE PuHeasants, properly so called (Phasianus, Cuv.)— Have a long graduated tail, each of its quills being inclined on two planes, and covering each other. The most common of them (PA. colchicus, Lin.), was brought from the banks of the Phasis by the Argonauts, and is now diffused over all temperate Europe, where it requires, however, considerable care. [Another, from China, with a white ring round the neck, and a greener general cast of colour, but otherwise closely allied, has also been turned wild, and produced a prolific race of hybrids with the Common Pheasant, intermediate specimens in every degree being not uncommon. The pure breed of Ph. colchicus is distinguished by the total absence of the white ring, and reddish-copper tint of the croup, instead of greenish. China produces several other species, with most superb plumage, as The Golden Pheasant (Ph. pictus), and Amherst Pheasant (Ph. Amherstii), which have both a gorgeous ruff round the neck, and the latter in particular an exceedingly long tail, the feathers widening in the middle. The Reeves’s Pheasant (PA. Reevesii), from the same country, is one of the most magnificent of birds. It is half as large again as the common species, with a tail exceeding six feet in length. Ph. versicolor, and Ph. Soémeringii, from Japan, are also truly splendid, and nearly allied to the common one. Others approximate the Common Fowl in their carriage, as the Silver Pheasant (Ph. nycthemerus), from China, and the Lineated (Ph. lineatus), from the mountains of Thibet: both these have purple-black under-parts, with the feathers above white and lineated ; a pendent crest on the head. Ph. albocristatus comes still nearer to the Fowls, retaining the head only of the Pheasant group; and Ph. pucrasia, is perhaps the dullest of the whole genus, with a pointed short tail, but is otherwise allied to the ordinary species: the two last are from the Himma- layas]. The females of all are sombre [that of-Ph. Reevesii the least so, which is beautifully variegated with white upon the neck,] and have shorter tails. We conceive that the description of the Pheenix, by Pliny, (lib. x. cap. 2), was drawn up from a specimen of the Golden Pheasant. One of the most singular of all Birds is The Argus (Ph. argus, Lin).—A large Pheasant from the south of Asia, the head and neck of which are almost naked. The tarsi are without spurs; a very long tail in the male; the secondary quills of the wing exces- sively elongated, widened, and covered throughout their length with ocellated spots, which, when spread out, impart an extraordinary aspect to the bird. It inhabits the mountains of Sumatra and some other countries of the south-east of Asia, and constitutes the genus Argus of Temminck. Tue Macartneys (Euplocomus, Tem.),— With the naked cheeks common to this genus, have the vertical tail and arched coverts of the Cocks, together with erectible feathers on the head, which form a crest similar to that of the Peafowl. The projecting lower edge of the naked skin of their cheeks supplies the place of wattles. The tarsi are armed with strong spurs. We are acquainted with one only, from the Isles of Sunda (Phasianus ignitus, Shaw) ; size of a Cock, and bril- liant black, with a golden-red rump, the upper tail-coverts yellowish or whitish, and the flanks spotted with white or fulvous. Female brown, finely streaked with blackish above. and dashed with white beneath; crested like ~ the male. [The PA. albocristatus might be placed with it.] . Tue TrRAGopans (Tragopan, Cuy.)— Are [with the exception of one species] remarkable for the singular adornment of the head, which is almost naked, with a small slender horn [or erectible excrescence} behind each eye, and a wattle sus- ceptible of inflation under the throat. There are short tarsal spurs in both sexes. [Four species are now known, all beautifully spotted with white, somewhat as in a Pintado, and in three of them upon a gorgeous red ground-colour; the naked parts are also vividly tinted with rich blue and yellow. Females and young dull brown. They inhabit the Himmalaya range of mountains, and perch like Pheasants]. We should separate from the Pheasant group Tue CryptTonyx, Tem.,-— Wherein the immediate circumference of the eye alone is naked, the tail is moderate and plain, and the tarsi are without spurs. Their most remarkable character, however, consists in the absence of the hind-claw. In the only well-known species (Cr. coronatus, Tem.), the male has a long crest of thinly-barbed rufous feathers, and some long barbless stems over each eyebrow. Plumage bright green and blue. [Another (Cr. niger), is wholly black, with the female brown. There are two or three more, all from India and its islands]. Tue Grouse (Tefrao, Lin.)— Form another great genus, characterized by a naked space, generally of a bright red colour, in place of an eye-brow. It is subdivided in the following manner. Tue RestricteD Grouse (Tetrao, Latham)— Have feathered tarsi without spurs. Those to which we more particularly confine the name have a rounded or forked tail, and naked toes. [They are polygamous, and spread the tail and strut in the manner of Turkeys]. The Bearded or Wood Grouse, Capercailzie, or Cock of the Wood (7. urogallus, Lin.), is the largest of the true Poultry, surpassing the Turkey in size. Its plumage is slate-coloured, finely rayed with blackish, [the breast shining bottle-green]; female fulvous, barred with brown or blackish. It inhabits the extensive mountain forests of the north of Europe, nestles in the heather or newly-cleared grounds, and subsists on buds and berries, [and particularly pine-shoots]. Its flesh is excellent, and the trachea makes two curves before entering the lungs. The Black Grouse (7. tetrvix, Lin).—Black, with some white on the wing-coverts and beneath the tail, the two outermost feathers of which are forked and curled outward. Female fulvous, barbed with whitish and dusky black. Their size that of the Domestic Cock and Hen. Found also in the European mountain forests. [There is a nearly allied species in Siberia]. An intermediate species appears to exist in the north of Europe (7. intermedius, Langsdorf). [It is still very doubtful whether this be not a hybrid between the Bearded and Black Grouse. Several more exist in North America; one (7. cupido) is remarkable for a double nuchal crest, and an expan- sile globular pouch on the sides of the neck, of the colour and size of an orange, which is inflated when the bird is strutting. Others, the Centrocercus, Swainson, have sharp-pointed tail-feathers, and shorter wings: they inhabit the open country, and do not perch. Suchis 7. urophasianus, Bonap., the great Cock of the Plains, which is one third smaller than the European Wood Grouse, with some inflatable skin on the sides of the neck. Others again, THe Bonasia, Bonap.— Have a naked strip along the front of the tarsi, and the coronal feathers lengthened ; as] The Hazel Grouse (T. bonasia, Lin.).—Scarcely larger than a Partridge, and prettily mottled, grey and rufous. Inhabits temperate Europe. [We have found its crop and stomach filled with birch catkins.] Another (7. umbellus, Gmelin), in North America, is about a third larger. Tue PrarMican (Lagopus, Cuv.)— Are species with a round or square tail, the toes of which are feathered like the tarsi. [They are monogamous, and do not strut with expanded tail-feathers]. The more generally diffused species become white in winter. The Common Ptarmigan (7. lagopus, Lin.).—Inhabits our highest mountains, and shelters itself, in winter, in holes which it burrows in the snow [a habit which is also practised by the common Partridge.] The Willow Ptarmigan (T. saliceti, Tem.), from the whole north, is larger, with a stouter bill. [Though not found in Britain, like the last, it is the common species of the London markets. Another, still more densely clad (L. bradydactyla, Gould), occurs in Russia, and there are additional species in Iceland and in North America]. There is a Ptarmigan in Scotland, however, which does not change colour in winter. The Heath Ptarmigan (7. scoticus, Latham).—{Com- mon Moor-fowl, or Red Grouse of sportsmen, remark- able for being quite restricted in its distribution to the British islands: it renews its feathers twice a year, however, like the others]. We may here separate by the name of Tue GaneGas (Pterocles, Tem.)— The species with a pointed tail and naked toes. RUE CG GET The circumference of the eyes alone is naked, and not of a red colour: their thumb is very small. [The wings are remarkably long and pointed, with the GALLIN. 229 first quill longest, and flight extraordinarily swift ; sternal crest more developed than in any other bird whatever, the inner emargination of the sternum almost obliterated : furcula singularly short and wide, without any appenddage: the alimentary passage resembles that of other Poultry, having coeca as much developed as in a Partridge. The feathers are nioulted twice a year, and resemble those of the Bustards, both sexes being alike in winter, and the male acquiring a peculiar garb in summer. They lay few eggs, and the young do not follow their parents for some time, but are fed by them in the nest. They inhabit the arid deserts of Africa and Arabia, and are peculiar to the eastern hemisphere. } One (T. alchata, Lin.), habits the south of France and borders of the Mediterranean. [Another (7. arenarius, Pallas) occurs in Spain, and a third (Pt. caspicus, Menetr.) is found in south-eastern Europe. There are iaany more, Closely allied to the Gangas, we deem THE TerraAoGaALius, Hardwicke,— A large species from the mountains of the north of India, with shorter wings and comparatively stout bill. The tarsi are armed with spurs, and the first five quills are nearly equal. , It 1s the T, nigelli, Gray]. Tue Parrrincss (Perdix, Brisson) ,— Have the tarsi naked as well as the toes. Among them Tue Francouins (Francolinus, Tem.)— Are distinguished by their longer and stouter beak, more developed tail, and generally by their stout spurs. There is one in southern Europe (7. francolinus, Lin.), with red feet ; the neck and belly of the male black, with round white spots, and a vivid rufous collar. Some of the foreign species are remarkable either for possessing double spurs, or a naked skin on the throat, or they combine these two characters: others, again, have a particularly large beak, and are without spurs. Tue Resrrictep ParrripGEes— Have the beak not quite so stout: the males have short spurs, or simple tubercles, which are wanting in the females. Every one is acquainted with The Grey Partridge (7. cinereus, Lin.), that prolific species of game, which lives and propagates in our fielcs, and is so highly esteemed for the table. The Red Partridge (T. rufus, Lin.) [and five or six others with the same general character of plumage, form a natural group, the first dress of which is analogous to that of the preceding. All are peculiar to the eastern hemisphere. } THE Quatts (Cofurniz, Tem.)— Are smaller than the Partridges; with a more slender beak and shorter tail: they have neither spurs nor red eyebrow, [and have longer wings. All are peculiar to the eastern hemisphere, where they are generally diffused]. The Common Quail (7. coturnix, Lin.), a small European bird, celebrated for its migrations across the Medi terranean. [There are many others.] THE Couns (Ortyx, Stephens),— Or Partridges and Quails of America, have a shorter and stouter beak, more convex above: their tail is somewhat larger. They perch on branches, and, when disturbed, even on trees.* Several species migrate like our Quails. {Some have remarkable recurved topknots, in one of cxtraordinary length]. We are obliged to separate from the whole genus of Grouse THe OrtyeGans (Hemipodius, Tem.),— ; Which have no thumb, and the compressed beak of which forms a slight projection under the lower mandible. They cannot, however, be properly classed until their anatomy is known. The species are polygamous, and inhabit sandy regions. Some of them, Tue Ortycans (Ortygis, llliger),— Have the general aspect of Quails, with toes separated to their very base, having no small membrane. [The chief peculiarity of their anatomy consists in the absence of a craw. ] The natives of Java train one species for fighting (the H. pugnaa), as Game-Cocks are trained in England. * The Red Partridges will sometimes do this.—Epn. 230 AVES. Others, Tar ArracEens (Syrrhaptes, lliger),— Are so far removed from the general type of the Poultry, that it is even doubtful whether they should range in the present order. [They appear to be nearly related to the Gangas.] Their short tarsi are feathered, as are also the toes, which are short, and joined together for a part of their length; tie wings being extremely long and pointed. But one species is known, from the deserts of central Asia [and very rarely eastern Europe,] (7. paradoxus, Pallas), the Heteroclyte of Temminck. We are equally necessitated to separate from the Grouse Tue Tinamouvs (Tinamus, Latham ; Crypturus, Iliger),— An American genus, remarkable for a long and slender neck, (although the tarsi are short,) covered with feathers, the tips of the barbs of which are slender and slightly curled, which imparts a peculiar air to that part of their plumage. The beak is long, slender, and blunt at the end; somewhat vaulted, with asmall groove at each side: the nostrils are pierced in the middle of each side, and penetrate obliquely backwards. Their wings are short, and they have scarcely avy tail. The membrane between the base of their toes is very short. Their thumb, reduced to a spur, cannot touch the ground. They have a small naked space round the eye. These birds either perch on low branches, or conceal themselves in tall grass; they live on fruits and insects, and their flesh is very good. Their size varies from that of a Pheasant down to that of a Quail, or even still smaller. [Eggs of a deep purple colour. ] Some of them (the Pezus of Spix), have a small tail concealed under the feathers of therump. Others (the Tinamus of Spix) have no tail at all, and the nostrils are placed a little further backward. We should distinguish the Rhynchotis of Spix, wherein the beak, which is stronger, has no groove, and is a little arcuated and de- pressed, with the nostrils pierced towards the base. THe PicEeons (Columba, Lin.)— May be considered as forming some passage from the Galline to the Passerine. As in the former, their beak is vaulted, the nostrils are pierced in a large mem- branous space, and covered with a cartilaginous scale, Bi eeernastiot Tins mou. which even forms a bulge at the base of the beak: the bony sternum (fig. 111) is deeply and doubly emarginated, although somewhat differently [the inner notch being mostly reduced to a foramen; the ridge of the sternum deep, and rounded off anteriorly (much as in the Par- rots) ; and the furcula flat and destitute of any appendage]. The crop (fig. 70, p. 160) is extremely large [and double, or expanding on each side of the cesophagus, in which it differs from that of any other bird; it also secretes a lacteal substance, as in the Parrots, during the period of incubation. The gizzard is power- fully muscular ; the intestines very long and slender, with minute cceca; and there is no gall bladder]. The inferior larynx is fur- nished with but one muscle proper—[we have invariably found two pairs]; but there is no other membrane between the base of the toes than that which results from the continuity of the edges. The tail consists of twelve feathers, and they fly tolerably well. These birds are invariably monogamous, nestle in trees or the holes of rocks, and lay but very few eggs, ordinarily two, though they breed often. Both sexes incubate, and they feed their young by disgorging grain macerated in the crop. They form but one great genus, which naturalists have attempted to divide into three subgenera, from the greater or less strength of the bill, and the proportions of the feet. Fig. 111.—Sternum of Pigeon. GRALL&. 231 Tue Gouras (Lophyrus, Vieillot)— Approximate the ordinary Gallinacee more than the other subgenera, by their more elevated tarsi and gregarious habits, finding their food more on the ground, and never [not so habitually] perching. Their beak is slender and flexible, [aud their anatomy precisely that of the others]. One species is even allied to the Gallinacee by the caruncles and other naked parts about the head (the C. carun- culata, Tem.) Another, at least, approaches them in size, which almost equals that of a Turkey,—the Crowned Pigeon of the Indian Archipelago (C. coronata, Gm.).—Entirely of a slaty-blue, with some chestnut and white on the wings; the head adorned with a vertical longitudinal crest of thinly-barbed feathers. It is bred in the poultry-yards of Java, &c., but refuses to propagate in Europe. It is to this species that the names Gowra and Lophyrus espe- cially apply. A third approximates the Poultry by the long pendent feathers of its neck, somewhat asin the Cock,—the Nicobar Pigeon (Col. nincobarica, Lin.), of a brilliant golden-green colour, the tail white. It is found in many parts of the Indian Isles, [and propagates in the same manner as the others, contrary to what has been asserted. Other small species compose the Chemepelia, Swainson, as the Ground Dove of Wilson’s American Ornithology, C. passerina, Lin.} P Tue RestricteD PiGEons (Columba, as limited)— Have shorter legs than the preceding, but the same flexible and slender bill. There are four wild species in Europe The Cushat, or Ring Dove (Col. palumbus, Lin.), is the largest of them. It inhabits forests, and more parti- cularly those of evergreens, and is of a bluish ash-colour, rufous beneath, and distinguished by a spot of white on each side of the neck. [It nestles on the branches of trees. ] The Stock Pigeon (C. wnas, Lin.).—Of a slaty-grey colour, vinous beneath, with some changeable green upon the neck. Rather smaller than the last, and similar in its general habits. [It breeds, however, either in conve- nient holes of trees, or in leafy pollards termed stocks, and not unfrequently in rabbit-burrows; makes no flap- ping sound with the wings in flying, like the next species]. The Rock Pigeon (C. livia, Brisson).—Slaty-grey, some iridescent green on the neck, two black bars on each wing, and awhite rump. The Dovecot Pigeon is derived from this species, and, it would appear, the greater number of the innumerable domestic breeds, in the production of which, however, the admixture of some proxi- mate species may likewise have an influence. [The wild Rock Pigeon breeds principally in sea-cliffs, and but sparingly inland. There is a race, which we suspect to be a distinct species, closely allied, the wings of which are spotted, somewhat as in the Stock Pigeon, but more extensively, in place of the black bars. Numbers of them, all shot, are sold in the London markets. We will term it C. macularia]. The Turtle Dove (Col. turtur, Lin.).—A fulvous-brown mantle, spotted with brown, the neck bluish, with a spot on each side, variegated black and white. It is the smallest of the European wild Pigeons, and resembles the Cushat in its habits, [excepting in being migratory]. The Collared Dove (Col. visoria, Lin.), appears to have been originally from Africa. It is of a reddish-white colour, pale below, with a black collar on the neck. The species of this division are extremely numerous, and might be further subdivided according as the tarsi are naked or feathered, and upon the naked space surrounding the eyes of some of them. Those with feathered tarsi constitute the Ptilinopus, Swainson. Some have even caruncles and other naked parts on the head: and there are others [the Ectopistes, Swainson], which might be separated on account of their pointed tail. But the best of all the divisions that have been instituted among the Pigeons is that of Tue Vrnacos (Vinago, Cuv.),— Which are recognized by having a stouter bill, of solid substance, and compressed laterally: their tarsi are short, and their feet large and well bordered. They inhabit extensive woods, and subsist on fruit. But few species are known, all from the torrid zone of the eastern continent. [They have generally vivid-green plumage, variegated with bright yellow]. One has a pointed tail. THE FIFTH ORDER OF BIRDS— THE STILT-BIRDS (Gratta, Lin.),— Also termed Shore-birds and Waders, names which are derived from their habits and con- formation. The members of this division are recognized by the nudity of part of the tibia, and most commonly by the elongation of the tarsi; conditions which permit them to enter 232 AVES. the water to a certain depth without immersing the feathers, and to wade therein and seize fish by means of the neck and beak, the length of which is generally proportioned to that of the legs. The stronger among them feed on fish and reptiles, and the weaker on worms and insects. A very few content themselves in part with grain or herbage, and these alone inhabit at a distance from any water. Their external toe is most commonly united at base to the middle one, by means of a short membrane; in some there are two membranes, while others want them entirely, having the toes quite separated; it also sometimes happens, though rarely, that they are palmated to the end : the thumb is altogether wanting in several genera ; and all these circumstances exert an influence on their mode of life, which is more or less aquatic. Nearly the whole of these birds, if we except the Ostriches and Cassowaries, have long wings and fly well. They stretch out their legs backward during flight, contrary to what is ob- served of others [or at least those of the foregoing orders], which double them under the belly. In this order we establish five principal families, together with some isolated genera. The first family of Stilt Birds, that of THE BREVIPENNES, Although generally similar, in other respects, to the rest, differs widely from them in the shortness of the wings, which are inadequate to perform the function of flight. The beak and regimen give them numerous affinities with the Gallinacee. It appears as if all the muscular power which is at the disposal of nature, would be insuffi- cient to move such immense wings as would be required to support their massive bodies in the air: their sternum (fig. 112) is a sumple buckler, and without the ridge which exists in all other Birds. The pectoral muscles are reduced to ex- treme tenuity ; but the posterior ex- tremities regain what the wings have lost. The muscles of their thighs, and of the legs especially, are of an enormous thickness. [ Most, if not all, of these birds, are remarkable for their singular mode of incubation. In the Ostrich, Emeu, and Nandou, it appears that several females lay in the same nest, the eggs being chiefly sat upon by the male, who feigns lameness when disturbed : Ship ESSE THEOL ake an artifice practised by the generality of ground-birds. It may therefore be presumed that they are polygamous, the attendant females of each male depositing their eggs together, commonly to the number of thirty, or even more. | They all want the back-toe. In the Ostrich, the number of phalanges to the two front-toes are four and five; in the Cassowary, [Emeu,] and Nandou, the phalanges of the three front- toes number three, four, and five, respectively. We recognize two genera. rat A ; a : mi i MY Wy) Tae OsrricuEs (Struthio, Lin.),— Have lax and flexible feathers on the wings, which latter are sufficiently long to accelerate their speed. Every one is acquainted with the elegance of these slender-stemmed feathers, the barbs of which, though furnished with secondary barbules, do not hitch in each other, as is the case with feathers generally. The beak is horizontally depressed, of mean length, and blunt at the tip; the tongue short, and rounded like a crescent ; and the eye large, with its lids garnished with lashes. Their legs and tarsi are very long. They have an enormous crop, and considerable proventriculus between the crop # ai - a GRALLA. 233 and gizzard, voluminous intestines, and long ececa, also a vast receptacle in which the urine accumu- lates, as in a bladder; they are accordingly the only birds that urinate. The penis is very long, and often protruded. But two species are known, each of which might form a separate genus, [and they are now generally recognized as such, an additional species having been discovered of one of them.] The Ostrich of the Eastern Continent (Str. camelus, Lin.).—Only two toes to each foot, the outer of which, shorter by one-half than the other, is destitute of a nail. This bird, celebrated from the most remote antiquity, and very numerous in the sandy deserts of Arabia and the whole of Africa, attains the height of six feet anda half. It lives in large flocks, lays eggs which weigh nearly three pounds each, and which, in very hot climates, it leaves to be hatched by the solar heat, but, in extra-tropical regions, carefully incubates and de- fends them with courage. It subsists on grain and herbage, and its taste is so obtuse, that it swallows indifferently pebbles, pieces of iron, copper, &c. [its gizzard always containing a surprising quantity of small stones, which are doubtless taken for the purpose of assist- ing in the trituration of the food.] » When pursued, it dashes stones behind it with great force. No animal can overtake it in the chace. The Nandou (Str. rhea, Lin. [Rhea americana, Auctorum]), or Ostrich of America, is about half the size of the African Ostrich, and Fig. 113.—Foot of Ostrich. more thinly covered with feathers: it is also distinguished by pos- sessing three toes to each foot, allof which are furnished with claws. Its plumage is greyish, inclining to brown above, with a black line descending along the neck of the male. Is not less abundant in South America than the other is in Africa. It is easily tamed when taken young, and its flesh during youth is eaten. [The tarsi of this bird are scutellated. A second South American species (Rh. Darwinii, Gould; Rh. pennata, D’Orbigny), is one fifth less in size, with reticulated tarsi : it has also a more densely plumed wing, the feathers of which are broader, and are all terminated by a band of white. The bill is shorter than the head, and the tarsi are plumed for several inches below the joint. Inhabits Patagonia, where it is rare. Mr. Darwin observed that the Nandous swim with facility]. (iGusear tee \ A Tue Cassowartss (Casuarius, Brisson) — Have wings still shorter than those of the Ostriches, and quite useless in aiding progression. Their feet have three toes, all furnished with nails; and the barbs of their feathers are so little fringed with barbules, that at a distance they resemble pendent hair. [The accessory plume of the feathers (which in the Ostrich and Nandou does not exist at all) attains its maximum of developement, so that two equal stems appear to grow from the same quill, while in the restricted Cassowary there is even a third in addition. ] Two species likewise occur of this genus, ¢ach of which might also be elevated to the rank of a genus, [nov generally accepted]. The Galeated Cassowary (Str. casuarius, Lin. ; [Casuarius Emeu, Auctorum] ).—The beak laterally compress d and head surmounted with a bony prominence, invested with a horny substance; the skin of the head and neck of an azure blue and flame-colour, with pendent caruncles, analogous to those of the Turkey: wings furnished with some rigid barbless stalks, which are employed as weapons in combat: the nail of the inner toe much the strongest. It is the largest species of bird, next to the Ostrich, from which it differs considerably in its anatomy; for it has short intestines an ! small coeca, wants the intermediate stomach between the crop and gizzard, and its cloaca does not proportionally exceed that of other birds. It lives on fruit and eggs, but not on grain; and lays dark-green eggs, few in number, which, like the Ostrich, it aban- dons to the heat of the sun. It is found in different islands of the Indian Archipelago. The Emeu of New Holland (Casuarius Nove Hoilandie, Latham, [Dromaius Nove Follandie, Vieillot}).—A depressed beak, with no casque on the head, nor naked space except around the eye; the plumage brown, more dense, and the feathers more barbed; no caruncles, nor spurs to the wing; and the nails of the toes nearly equal. Its flesh resembles beef: it is swifter than the fleetest Greyhound, and the young are striped brown and white, {Either this or more probably an allied species has been extirpated Fig. 114.—Sternum of Emeu. ae aS a ee ee ie ern ae SS rene Oe ee an i are ne ak oh tn ig ce pen ee ees 3 234 AVES. in New Zealand, where some bones of it have been found, and a tradition of its destruction is preserved by the inhabitants. ] N. B.—We cannot with propriety admit into this series, species so little known, or so ill-authenti- cated, as those which compose the genus of Dopos (Didus, Lin.),— The first species of which (D. ineptus) is only known from the description of it by the early Dutch navigators, preserved in Clusius (Hot. p. 99), and by an oil-paint- ing, of the same epoch, copied by Edwards, pl. 294; for the description by Herbert is puerile, and all the rest are copied from Clusius and Edwards. It seems that the species has entirely disappeared, for at the present time there is only a foot of it extant in the British Mu- seum, and an ill-preserved head in the Ashmolean Mu- seum at Oxford. The beak appears to be not without some resemblance to that of the Awks, and the foot would resemble that of the Penguins, had it been pal- mated. [Since this was written, the author personally examined these last precious remains of the now extinct Dodo, and was not merely satisfied of their validity and total generic distinctness, but expressed an opinion that the foot also preserved at Oxford was specifically different from that in the British Museum. ] The second species (D. solitarius) rests on the sole testimony of Leguat (Voy. i. p. 98), a man who has mis- represented well-known species of animals, as the Hip- popotamus and Manati. The third, or Bird of Nazareth (D. nazarenus), is only known from the account of Francois Carechi, who considers it the same as the first species, giving it however but three toes, while all the others allow that bird to have four. No one has been able to inspect any of these birds since the time of those voyagers. Fig. 113.—The Dodo. Tue Apteryx, Shaw,— Appears, of all Birds, to have the wings most completely reduced to simple rudiments. Its general form is that of a Penguin, and size that of a Goose. The feet also bear some resemblance to those of the Penguins, but are not described to be palmated. The beak is very long, slender, marked on each side with a longitudinal groove, and furnished with a membrane at its base: [the nostrils are placed at the top of the upper mandible be- neath, which passes beyond the under one]. Wing reduced to a little stump, terminated by a hook. [Several specimens of this singular bird have re- cently been received, more particularly in England, and its characters are now tolerably determined. It has no relationship whatever with the Penguin group, < but there is every reason to place it in the present family. From all other birds, it differs in the com- hemes aii anes pleteness of its diaphragm, and in the absence of abdominal air cells ; none of its bones are hollow. The sternum | is exceedingly reduced, with one deep posterior emargination on each side, and also a pair of anomalous perfora- tions or foramina towards the middle: the ribs are extraordinarily broad, and a single pair of vocal muscles are attached to the coracoids: stomach but slightly muscular, and intestines of mean length, with moderate-sized coeca. The feathers have no accessory plume, and their shafts are prolonged considerably beyond the barb; there are many long vibrisse about the base of the bill, which is invested with a ceral membrane. The feet have a short and elevated hind-toe, the claw of which is alone externally visible. The dimensions of the female appear to exceed those of the male, and her bill is longer. Size that of a domestic fowl, and colour deep brown. This very interesting bird is nocturnal in its time of action, and subsists on insects. It runs with rapidity, and defends itself vigorously with its feet. Its native name is Kivi-kivi, derived from its cry.] The fami'y of ; PRESSIROSTRES— Comprehends a number of genera with elongated tarsi, in which the back-toe is either quite absent, or so short as not to reach the ground. Bill moderate, but strong enough to penetrate GRALL. 235 the ground in search of worms, [to obtain which they have the habit of patting with the feet, which causes the worms to rise]: those species in which it is more feeble frequent meadows and newly-ploughed land, where this food can be procured with greater ease : those which have stronger bills, subsist additionally on grain, herbage, &c. Tue Busrarps (Otis, Lin.)— With the heavy port of the Poultry, combine rather a long neck and legs, together with a moderately stout bill, the superior mandible of which is slightly arcuated and vaulted; and they also further approximate the Gallinacee by the very small membrane at the base of their toes: but the nudity of the lower. portion of the tibia, their whole anatomy, and even the flavour of their flesh, concur to place them in the-present order, in common with various members of which they also want the back-toe, and the smaller species are nearly allied to the Plovers. They have reticulated tarsi, and short wings; fly little, hardly ever using their wings, except to assist them in running, the same as the Ostriches ; and feed equally on grain, herbage, and worms and insects. [The stomach is very capa- cious, and extremely attenuated, contrasting remarkably with the muscular gizzard of the true Plovers ; their plumage is moulted twice in the year, the males of most of them developing accessory ornamental feathers, or black under-parts, in the spring; and their flight, when they do fairly rise, is easy and winnowing, and capable of considerable protraction. The species are numerous, and confined to the Eastern Continent. The two first, one indigenous, the other an occasional visitant, in the British Isles, possess a comparatively stout beak, which is compressed laterally. ] The Great Bustard (0. tarda, Lin.).—Bright buff-coloured plumage on the upper-parts, crossed with numerous black lines; elsewhere greyish-white, The male, which is the largest of European birds, has [in its summer dress] lengthened ear-coverts, which form a sort of large moustache on each side. This species, which is one of the finest kinds of game, frequents extensive plains, and nestles on the ground amongst the corn. [It is polygamous, and the female is much smaller than the maie; the latter being further distinguished by a very capacious mem- branous sac beneath the tongue. The voice of the male is a remarkable explosive sound. This bird lays only two eggs, of a dark greenish colour, with some black patches: the young, when first hatched, are very like young Piovers. It has been nearly extirpated in Great Britain.] The Little Bustard (0. tetrax, Lin.).—Less than half the size of the last species, and much less widely diffused ; of a brown colour, speckled with black above, whitish underneath. The male with a black neck, [in summer plu- mage Only,] and two white collars. [In this species, the sexes scarcely differ in size, from which we should infer that it is monogamous. It Jays four or five spotless green eggs in corn-fields, and is also highly esteemed for the table. ] The greater number of exotic species have the bill more slender, [and depressed instead of compressed]. Among them we may remark The Ruffed Bustard (O. houbara, Desm.), of Africa and Arabia, [and rarely Spain, the male of] which is adorned with lengthened feathers on the sides of the neck. [Another species with this character exists in central Asia.] Tue Provers (Charadrius, Lin.)— Likewise want the hind-toe, and have a middle-sized bill, compressed, but swoln towards the tip. They may be divided into two subgenera. THe THICK-KNEES ((dicnemus, Tem.),— Wherein the tip of the bill is inflated above as well as beneath, and the groove of the nostrils extends only half the length of the beak. They are the largest of the Plover group, and live by preference upon arid and stony districts, feeding on slugs, insects, &c. They are allied to the smaller species of Bustards [in their exterior conformation, but not in the structure of the stomach, which is a muscular gizzard: their plumage also is moulted once only in the year, and they undergo no seasonal change of colour]. Their legs are reticulated, and they have a short membrane at the base of their three toes. The European Thick-knee (Ch. wdicnemus, Lin. ; Gd. crepitans, Tem.).—Size of [larger than] a Woodcock, and fulyous-grey, with a brown streak along the middle of each feather; the belly white, and a brown space under the eye. [This is the Stone Curlew, Whistling or Norfolk Plover, asit is variously designated, which is common in several districts of South Britain, and well known wherever it occurs from its sonorous whistling. It lays but two eggs, which however do not resemble those of the Bustards, and taper at one end; the smaller Bustards (as we have seen) produce a greater number. The Thick-knees are for the most part migratory, but some regularly stay the winter. We have reason to believe that it rears more than one brood in a season. There are several exotic species, some considerably larger and much stouter]. 236 AVES. Tue RestricreD Provers (Charadrius,)— Have the beak swoln only above, and two-thirds of its length occupied by the nasal groove on each side, which renders it weaker. They live in numerous flocks. frequent low and humid places, and stamp the ground to cause the worms on which they feed to rise. Those of France are merely birds of passage, which are met with in autumn and spring; near the sea-coast some of them remain till the beginning of winter. [They all breed, however, within the British isles, and at least some of them in France also.] Their flesh is excellent. They form, with numerous exotic species, a tribe with reticu- lated tarsi, of which the most remarkable are The Golden Plover (Ch. pluvialis, Lin.).—Blackish, speckled with yellow at the tips of the feathers; the belly black [in summer, in winter white. It breeds on upland moors. There are others very closely allied, but smaller, in India, Australia, and North America]. The Dottrel Plover (CA. morinellus, Lin.).—Grey or blackish, the feathers edged with whitish fulvous ; a white streak over the eye, the breast and upper part of the belly bright rufous, and the lower part of the belly white. [it breeds on the very summits of mountains uncovered by snow; flies in large scattered flocks, which are not shy; and is partial to chalky districts : its feathers are much esteemed by anglers. ] The Ring Plover (Ch. hiaticula, Lin.).— Greyish brown above, white beneath, with a black [or in winter a brown] collar on the lower part of the neck, very broad anteriorly ; the head marked with black and white, and the beak yellow tipped with black. Two or three races or different species inhabit these parts, varying in size and the distribution of the colours of the head. [Those of Britain are, first, the conmon Ring Plover, with plumage as above described, and orange-coloured legs, which is everywhere very abundant on the sea-coast, breeding both there and on heaths a little inland ; the Kentish Plover (Ch. cantianus), with longer and black legs, and a rufous occiput, an inhabitant of shingle-beaches, and less deeply coloured; and the Little Plover (C. minor), which is a diminutive of the first, and of excessively rare occurrence so far north.] There are numerous other foreign spe- cies, with similar general distribution of colours. Various exotic Plovers have scutellated tarsi, and form a small division (the Pluvianus, Vieillot), of which the greater number of species possess spurs to the wings, and fieshy wattles to the head; some of them have both these characters. Tue Lapwines (Vanellus, Bechst.; Tringa, Lin.)— Have the same beak as the Plovers, and are only distinguished by the presence of a back-toe, which however is so small that it does not reach the ground. In the first tribe of them (the Sguatarola, Cuv.), this back-toe iS scarcely perceptible. The Dill is swoln underneath, and the nasal groove as short as in the Thick-knee. The feet are reticulated, and the tail of the European species is rayed black and white. It associates with the Plovers. The Grey Lapwing, or Stone Plover (Tringa squatarola, Auct.)—[This bird differs only from the Golden Plover in the stoutness of its bill, and in possessing the small back toe. Its seasonal changes are the same, having the under-parts black in summer and white in winter; the feathers above are similarly mottled, only with whitish instead of yellow, except in the young, which is even speckled with yellow. From the true Lapwings and the Pluviani, this bird and the restricted Plovers differ in their pointed wings and reticulated tarsi; the latter having scutellated tarsi, broad and rounded wings, and a difierent system of coloration. Its habits are precisely those of the Golden Plover, and it breeds on some of the northern British moors. ] Tue Resrraictep Lapwines (Vanellus, Cuv.)— Have the hind-toe rather more developed, the tarsi scutellated, at least in part, and the nasal fossa pro- longed over two-thirds of the beak. They procure worms in the same manner as the Plovers, [and are peculiar to the eastern hemisphere ]. That common in Europe, the Crested Lapwing (T. vanellus, Lin.), is a handsome species the size of a Pigeon, of arichly bronzed black above, with a long and slender occipital crest. [Throat black in summer and white in winter, at which latter season the colours are comparatively dull.] Jt arrives in spring, lives and propagates in the meadows, and departs in autumn. The eggs are considered a great delicacy. There are some species of this genus in hot climates, the wings of which are armed with one or two spurs, and others which have fleshy wattles at the base of the beak. They are very noisy birds, screaming at every sound they hear, and defend themselves with courage against birds of prey. Live alsoin the meadows. [A second European species of Lapwing, from the south-eastern countries, is the V. gregarius, Pallas, or V. keptuscka, Tem.] Tue Oysrer-catcHers (Hematopus, Lin.)— Have the beak rather longer than in the Plovers and Lapwings, straight, pointed, and compressed into a wedge ; strong enough to enable them to force open the bivalve shells of the mollusks on which they feed. They also seek for worms upon the ground. The nasal groove, which is very deep, occupies half the length of the bill, and the nostrils are pierced in the middle like a small fissure. Their legs are of mean length, the tarsi reticulated, and the feet divided only into three toes. Iai GRALL. That of Europe (ZH. ostralegus, Lin.) is commonly termed Sea-pie, from its black and white plumage; the belly, throat, and base of the wings and tail, being of the latter colour; beak and feet bright orange-red. [There are several more. } We shall place near the Plovers and Oyster-catchers Tue Coursers (Cursorius, Lacepede ; Tachydromus, Iliger),— The beak of which, more slender, but equally conical, is arcuated, without any groove, and moderately cleft ; the wings are shorter, and the legs more elevated, and terminated by three toes, without any thumb or palmature. [They approximate the Bustards in appearance and habits, and have a similar large membranous stomach; but do not change colour with the seasons, and are very much smaller : are peculiar also to the eastern hemisphere]. One has been met with, but very rarely, in France and England, which is indigenous to the north of Africa, the Cream-coloured Courser (C. isabellinus, Meyer), of a pale fulvous colour above, white beneath, [the young trans- versely rayed above with narrow dusky lines. There are several others. } As far as can be judged from the exterior, it is here that we should also place Tur Carrama (Microdactylus, Geoff.; Dicholophus, Mliger)— Which has a longer beak, more curved, and cleft as far as the eye, which imparts somewhat of the physiognomy and disposition of the Birds of Prey, approaching also a little to the Herons. The legs, scutellated and very long, terminate in three short toes, a little palmated at the base, together with a thumb that does not reach the ground. [This curious bird is most nearly related to the Guans, and should rank in the Poultry order: the affinity is particularly apparent when it is seen alive. In its anatomy, it chiefly differs from the Galli- naceous type in wanting the appendage to the furcula, which latter is otherwise similar to that of a Fowl, and in having the sternal emarginations much less deep. It is essentially a Poultry bird with the long legs of a Crane ; but differs in its short and elevated hind-toe from the Carassows and Guans]. We are acquainted with one species only, from South America, (MV. cristatus, Geoff. ; Palamedea cristata, Gm. ; Saria, d’Az.), which surpasses the Heron in size, and subsists on Lizards and insects, which it hunts for on high grounds and along the borders of forests. Plumage yellowish-grey, waved with brown ; some thinly-barbed fea- thers at the base of the beak, forming a slight crest, which is thrown backward. It flies but seldom, and then badly ; and its loud voice resembles that of a young Turkey. As its flesh is esteemed, it has been domesticated in several places. The family of CULTRIROSTRES Is known by a tong, thick, and stout beak, which is most generally trenchant and pointed, and is almost entirely composed of the birds comprehended in the genus Ardea of Linnzus. In a great number of species, the trachea of the male [and of the female also} forms various curves: their coeca are short [or moderate], and the true Herons have even only one. We subdivide it into three tribes, the Cranes, the Herons properly so designated, and the Storks. The first tribe forms but one great genus, that of THE Cranes (Grus, Cuv.),— Which have a straight beak, but slightly cleft; the membranous groove of the nostrils, which is large and concave, occupying nearly half its length. Their legs are scutellated, with toes of moderate length ; the external but slightly palmated, and the thumb barely reaching to the ground. A more or less considerable portion of the head and neck is bare of feathers in nearly all of them. Their habits are more terrene, and their nourishment is derived more from vegetables, than in the following genera: they have accordingly a muscular gizzard, and tolerably long ceca. The inferior larynx is provided with only one muscle at each side. At the head of the genus we place, as Pallas has already done, Tue AGami (Psophia, Lin.),— Which has a shorter beak than the others, the head and neck invested merely with down, and the circumference of the eves naked. They live in the woods, and subsist on grain and fruits. 238 AVES. The best known species (Ps. crepitans, Lin.), inhabits South America, and is called the Trumpeter, from its faculty of producing a low, deep sound, which at first seems to proceed from the anus. It is the size of a large Capon; plumage black, with reflections of brilliant violet on the breast; and an ashy mantle tinged with fulyous above. This bird soon recog- nizes persons, becomes attached to them like a Dog, and when domesticated, it is said, may be left to take charge of other poultry. It flies badly, but runs with great swiftness, and nestles on the ground at the foot of a tree. Its flesh is considered good eating. [The location of this very singular species among the Cranes, is by no means satisfactory ; but we do not know that it can be placed to greater advantage elsewhere. Its port resembles that of the Struthious birds (or Brevipennes); and the configura- tion of the sternum (fig. 117) is unique, not even approaching that of any other group. The trachea is much elongated, and continued under the skin of the abdomen, which occasions the sound of its voice to appear to come from that part. Upon the whole, we conceive that it is as nearly allied to the Tinamous, which inhabit the same region, as to any other known genus, and would prefer to detach it in a more marked manner from that of the Cranes. It has also some remote affinity with Palamedea. Fig. 117.—Sternum of the Agami. Tue RestricTeD CRANES (Grus, Bechstein) — Have ample wings, and considerably longer neck and legs. Their figure is much more elegant and graceful; and they feed on corn, and upon reptiles ; chiefly frequenting humid districts in flccks that are often numerous. They do not run with speed; but have singular habits of attitudinizing, with expanded wings, and circling around each other with a light and tripping step. Their \oice is vw ry loud and harsh. Naturalists have further subdivided them, first into Tur BaLearicans (Balearica, Vigors),— The occiput of which is adorned with a peculiar bushy crest, composed of erect and crimpled barbless stems of equal length; the forehead is clad with short and close feathers, of velvety appearance ; and the throat is furnished with fleshy wattles. The sternum resembles that of a Heron; but the furcula is not anchylosed to its ridge, as in the others, nor does the trachea undergo any convolution; the laryngeal muscles are attached to the first true ribs. These birds perch with facility, and are very readily domesticated. Two species are known, from eastern and western Africa respectively ; the first with a pale grey neck, and much larger fleshy wattles, (B. regulorum) ; the other, which is more commonly brought alive to Europe, having a blackish neck and small wattles (B. pavonia). Both have also naked cheeks. The rest have lengthened tertials, and no crest: the furecula is soldered to the sternal keel, ard the latter is hollow and inflated to receive the trachea, which undergoes a convolution within it, as in several Swans. Such are Tue DeEMoIsELLes (4nthropoides, Vigors),— Which have the head and neck quite feathered, and the tertials hanging over the tail to reach the ground. They are confined to Africa, like the last. The Paradise Demoiselle (G. paradiseus, Vieillot ; Anth. Stanleyanus, Bennett).—A large species, entirely of a delicate ashy-grey colour ; the plumage of the head short and erectile, having very much the appearance of infla- table skin. The Numidian Demoiselle (Ardea virgo, Lin.) is much smaller, and characterized by a black neck, with two elegant whitish tufts on the sides of the head, formed by the prolongation of the ear-coverts. Finally, Tue True Cranes (Grus, Vigors)— Have the beak as long as the head, or longer; the head and part of the neck generally naked; and the tertials commonly recurved. The species are comparatively numerous, and much more widely distributed. Habits migratory. One is common in Europe, and sometimes occurs, but as an exceedingly rare straggler, in the British Isles, the European Crane (Ardea grus, Lin.; Grus cinerea, Bechst.) |—¥our feet and upwards in height, of an ash-colour, with a black throat; the summit of the head red and naked. ‘This bird has been celebrated from the earliest ages, on account of its regular migrations, from north to south in the autumn, and back in the spring, which it effects in numerous and well-ordered flocks. It feeds on grain, but prefers the worms and insects of marshy GRALLE. 239 grounds. The ancients frequently speak of it, because the principal course of its migrations appears to be through Greece and Asia Minor, Between the Cranes and Herons may be placed Tuer Courtan [ (Aramus, Vieillot), | The beak of which, more slender and rather more deeply cleft than that of the Cranes, is swoln near the terminal third of its length; and the toes are comparatively long, without any basal membrane. [Its anatomy approaches that of the Rails]. The species (Ard. scolopacea, Gm.), resembles the Herons in size as well as manners, and has brown plumage, with some white pencils on the neck. Also Tue Care (Luropyga, Ilig.),— With a beak more slender than that of the Cranes, but marked with a similar nasal groove, and split nearly to the eyes, as in the Herons, but having no naked skin at its base. It is a bird the size of a Partridge, with a long and slender neck, broad open tail, and rather short legs, which altogether impart a very different aspect from that of the wading birds in general. Its plumage, shaded with bands and lines of brown, fulvous, russet, grey and black, recalls to mind the colouring of some of the most beau- tiful Moths. It is found along the rivers of Guiana, [and we suspect is closely allied to the African genus Rhynchea). The second tribe is more carnivorous, and is characterized by its stronger beak, and longer toes: [they mostly nestle upon trees in large societies, and the young are at first helpless and naked]. At its head may be placed Tue Boatsitts (Cancroma, Lin),— Which would completely resemble the Herons in the strength of their bill, and the kind of nourish- ment resulting therefrom, were it not for the extraordinary form of that organ; as, upon close exami- nation, we find that it is merely the beak of a Heron or Bittern, very much inflated : in point of fact, the mandibles are singularly wide from right to left, and formed like the bowls of two spoons, the concave sides of which are placed in contact. These mandibles are very stout and sharp-edged, and the upper one has a pointed tooth on each side of its tip; the nostrils, pierced towards the base, are prolonged into two parallel grooves to near the end. The feet have four toes, all of them long, and nearly without con- necting membrane; for which reason these birds perch on the branches of trees by the sides of rivers, from which they precipitate themselves on the fish, which constitute their ordinary food. Their gait is slow, and their attitudes constrained like those of the Herons. [The Boatbills are, in brief, simply modified Herons, from which they differ only in their inflated beak, conforming in their whole anatomy. | The known species (C. cochlearea, Lin.), is the size of a common Fowl, and whitish, with a grey or brown back, the belly rufous, and forehead white ; head adorned with a black calotte, which, in the adult male, becomes a lengthened crest : it inhabits the hot and humid regions of South America. Tue Herons (Ardea, Lin.),— Have the beak cleft as far as the eyes, with a small nasal fossa pro- longed into a groove nearly to the point: they are also distinguished by the pectinated inner edge of the claw of their middle toe. Their legs are scutellated, with the toes (including the hind one) rather long [and articulated on the same plane]: the palmature of the outer ones is considerable, and their eyes are placed in a naked skin, which extends to the beak. Their stomach is a very large sac, but slightly muscular, [the intestines extremely long and slender,] and they have only one minute ccecum. They are unlively birds, which nestle and perch by the sides of rivers, and consume a vast quantity of fish. The species are very numerous in both continents, and can scarcely be dis- tinguished except by differences of plumage. The True Herons have a very slender neck, with long and pendent feathers towards its base. As ‘kne Common Heron (A. major & A. cinerea, Lin.).—Bluish ash-coloured, with a black occipital crest ; the neck Fig.118.—Sternum of Purple Heron, 240 AVES. white, marked on each side with a row of black tears ; [dorsal plumage rounded in the young, pointed after the first moult, and much elongated and narrowed in the adult, all the feathers having a crape-like appearance, devoid of gloss, but rich in colouring. Both sexes alike.] A large bird, very noxious on account of the quantity of fish it destroys, and formerly celebrated for the sport which it afforded to falconers. [It breeds, like most of the genus, on the branches of high trees, many nests together, which are termed Heronries ; seizes its prey by an instantaneous stroke of the bill, transfixing it if large; watches for it motionless ; emits a loud cry or honk, and flies buoyantly : characters which mostly apply to the genus generally.] We have also another species, the Purple Heron (4. purpurea) [smaller and more slender, with longer toes, like those of a Bittern. It breeds on the ground, and is rare in the British islands. Colour altogether more reddish. ] Certain small species with shorter legs are termed Dwarf-bitterns [the Ardeola, Bonap. They are in every respect true Bitterns, and resemble that of North America in immature plumage, acquiring a garb analogous to that of the Night-herons when adult.] There is one common in the mountainous districts of France (Ard. minuta and danubialis, Gm.), which is scarcely larger than a Rail, and fulvous, with the calotte, back, and quills, black. It frequents the vicinity of ponds. The Tiger-bitterns conjoin to the contour of the Dwarf-bitterns the stature of a Heron and the plumage of the ordinary Bitterns. : Egrets are Herons, the feathers of which, on the lower part of the back, at a certain epoch are lengthened and thinly barbed. [They are mostly pure white.] One of the handsomest of them, the Heron-crested Egret (4. gar- zetta, Lin.), is entirely white, with the dorsal plumage not extending beyond the tail, [and a long occipital crest of narrow feathers, resembling in shape those of the Common Heron. It is peculiar to the eastern continent]. Also the European Great Egret (4. alba and egretta), likewise wholly white, and the thinly-barbed dorsal plumage prolonged beyond the tail. [There are numerous others, in every part of the world. A third in Europe is the Butf backed Heron or Egret (4. xussata), with a shorter and smooth yellow bill, longer toes, and coloured dorsal plumage in the adult, like the next species. | ‘ We approximate to the Egrets the Squacco Heron (A. comata and ralloides), a bird of the south of Europe, with a russet-brown back, the belly, wings, and tail, white. The adult has a yellowish neck, [densely clad like that of a Bittern], and a long [striped] occipital crest: [the toes are also long, and the lengthened dorsai plumage of this and the last species are of a hair-like texture, besides resembling in colour. The present species occurs less unfrequently in the British Isles than either of the three last.] Bitterns have the feathers of the neck lax and separated, which increases their apparent size, [at least when they erect them, which they have the power of doing to their whole clothing plumage]. They are commonly rayed or speckled, [and not so high on the legs]. The European Bittern (4. sfed/aris) is bright fulvous or clay-colour, mottled and speckled with blackish, and has green bill and feet. It is found among the reeds, whence it emits its terrific voice, which has caused it to be designated Bos-taurus. [This bird is not rare in Britain, runs with great celerity like a Rail, flies also with unwillingness, and with its legs hanging, during the day, and when surprized puffs out its plumage in an extra- ordinary manner, and strikes with its spear-like bill. In the evening it rises to a vast height in the air, in spiral circles, occasionally bellowing in its flight: it breeds among aquatic herbage in the marshes, and lays eggs of a dark brown colour. ] The Night-herons, with the same port as the Bitterns, have the beak proportionally much thicker, and some slender feathers [three in number] growing from the occiput of the adult. One only inhabits Europe (A. nyeti- curax, Lin.), the male of which is whitish, with the calotte and back black ; the young brown above spotted with whitish, and the calotte dusky. [It is rare in Britain.] In fine, we should remark that these different subdivisions of the genus of Herons are of trivial import, and by no means well defined. [Together with the Boatbills, they constitute a perfectly distinct group, strongly charac- terized by their anatomy, and particularly by the single minute caecum, and the number of cervical vertebre —seventeen. | The third tribe, besides having a stouter and smoother beak, has tolerably strong and nearly equal membranes between the bases of the toes. Tue Storxs (Ciconia, Cuv.)— Possess a thick bill, moderately cleft, without any fossa or groove, and the nostrils pierced towards the back and base ; also an extremely short tongue. Their legs are reticulated, and the front toes strongly palmated at base, more particularly the outer. Their large and thin mandibles, by striking against each other, produce a clattering noise, which is almost the only sound these birds ever make. Their gizzard is slightly muscular, and their two ceca so small as to be barely perceptible. Their inferior larynx has no muscle proper; and the bronchi are longer and composed of more entire rings than usual. We have two species in France. The White Stork (A. ciconia, Lin.).—White, with black quill-feathers, and red bill and feet ; a large bird, which the people hold in particular respect, doubtless originating from its utility in destroying Snakes and other noxious animals. It nestles by preference on towers and chimney-stacks, returning to the same every spring, after having passed the winter in Africa. [The reason that this species is not common in Britain, is that every pair are shot soon after making their appearance, which prevents the founding of a colony. } GRALLZ. 241 [The Black Stork (A. nigra, Lin.).—Blackish, with rich purple reflections, and the belly white. It frequents retired marshes, and builds in the forests. Among foreign species, we may distinguish Tue Apsutants [Argala, Beun.],— Or bare-necked Storks, the beak of which is still larger and slighter; and among them The Pouched Adjutants (Ard. dubia, Gmelin; A. argala, Lin.); which have an appendage under the middle of the throat resembling a great sausage, and from beneath the wings of which are procured those light downy fea- thers, that are made into tufts called Maribuus. Two species of them are known; one from Senegal, with a uniform mantle, (Cic. maribou, Tem.), the other from India, of which the wing-coverts are bordered with white, (C. argala, Tem,).—Their large beak enables them to capture birds on the wing. Add C. capillata, Tem. Tue Jasrrus (Myeteria, Lin.),— Which were separated by Linnzus from Ardea, are very closely allied to the Storks, and much more so than the latter are to the Herons; the moderate opening of their beak, their nostrils, the reticu- lated envelope of their legs, together with the considerable palmature of the toes, are absolutely the same as in the Storks, which they further resemble in their mode of life. Their peculiarity consists in having the beak slightly curved upwards towards its extremity. The best-known species (I. americana, Lin.), is very large, and white, with a bare head and neck, invested with a black skin, the lower part of which is red; the occiput alone has some white feathers, and the beak and feet are black. It is found along the borders of pools and marshes in South America, where it preys on reptiles and fish. The Ciconia ephippiryncha, Ruppell, only differs from M. senegalensis, Latham, in being drawn from the recent specimen. Tue Umsres (Scopus, Brisson)— Are only distinguished from the Storks by their compressed beak, the trenchant ridge of which is inflated towards the base, and the nostrils are prolonged by a groove which runs parallel with the ridge to its tip, which is slightly hooked. One species only is known, the Crested Umbre (Sc. umbretta), as large as a Crow, and of an umber colour, the male crested. It is diffused over all Africa. Tur Anastomes (Hians, Lacep. ; Anastomus, Illig.)— Are separated from the Storks by about as trivial a character as that which distinguishes the Jabirus. The mandibles of their beak come in contact only at the base and tips, leaving a wide interval between their edges, at the medial portion. Even this seems to be the result of detrition, for the fibres of the horny substance appear as though it had been worn away. They are East Indian birds, one of which is whitish (Ardea ponticeriana, Gm.), the other greyish-brown (A. coromandeliana, Sonnerat). Perhaps the latter is merely the young of the former. Both have black quill and tail-feathers. A third, of an iridescent black (An. lamelliger, Tem.), is remarkable for the stem of each of its fea- thers terminating in a narrow horny chsk, which passes beyond the vane. THe Dromes (Dromas, Paykull)— Bear a close resemblance to the preceding, having nearly the same feet and contour; but their com- pressed beak, the base of which is a little inflated beneath, is pierced with oval nostrils, and the mandibles close completely. We know only one species, from the shores of the Red Sea and banks of the Senegal (Dromas ardeola, Payk.) with white plumage, and part of the mantle and wings black. Tue Tantats (Jantalus, Lin.)— Have the feet, nostrils, and beak of the Storks, except that the ridge of the latter is rounded, and its tip gradually curved downwards, and slightly emarginated on each side: a portion of the head, and sometimes of the neck, is bare of feathers. The Wood Ibis of North America (7. Joculator, Lin.).—As large as a Stork, but more slender ; white, with the quill and tail-feathers black, as is also the naked skin of the head and neck. It is found in both Americas, appearing in each during the rainy season, and frequents muddy waters, where it seeks principally for Eels. Its gait is slow, and general aspect unlively. The African species (7. ibis, Lin.), which is white, slightly shaded with purple on the wings, and has a yellow beak, and the naked skin of the visage red, was long regarded by naturalists as the bird so revered by the ancient Egyptians under the name of Ibis; but recent researches have proved that the real Ibis is a much smaller species, which we will notice presently. The bird now under consideration is not even commonly found in Egypt, but is brought chiefly from Senegal. R 242 AVES. That of Ceylon (T. lewcocephatlus) is the largest of all, and has also the thickest bill. Its beak, and the naked skin of the face, are yellow, the plumage white, with black quills and cincture round the breast, and long roseate plumes on the croup, which are shed during the rainy season. A fourth may be added, the 7. lacteus of Temminck. ; THE Spoonsixxs (Plaialea, Lin.)\— Approximate the Storks in their whole structure, but their beak, from which their name is derived, is long, flat, and broad throughout its length, widening and flattening more particularly at the end, so as to form a round spatula-like disk ; with two shallow grooves extending its entire length, without being exactly parallel to its edges. The nostrils are oval, and pierced at a small distance from the origin of each groove. Their minute tongue, reticulated tarsi, the somewhat considerable palmature of their toes, their two very small cceca, but slightly muscular gizzard, and inferior larynx without any peculiar muscles, are the same as in the Storks; but the expansion of their bill deprives it of all its strength, and unfits it for any thing but turning up sand, or picking up small fish and aquatic insects. The White Spoonbill (Pl. /eucorodia, Gm.).—Entirely white, with an occipital crest. It is common throughout the ancient continent, and nestles in high trees. [The trachea normally undergoes in both sexes a small conyolu- tion resembling the figure 8, but we have dissected one female wherein it proceeded straight to the divarication of the bronchi, and was furnished with a small pair of muscles]. The Roseate Spoonbill (Pl. ajaja).—A naked visage, and vivid roseate tints of different shades upon the plumage, which deepen with age. It is properly an inhabitant of South America. The family of LONGIROSTRES Consists of a multitude of Shore-birds, the greater number of which were comprehended by Linnzus in his genus Scolopax, and the rest confounded by him in that of Tringa, though partly in opposition to the character assigned to the latter, of having the back-toe too short to reach the ground. Lastly, it contains a few that have been placed with the Plovers, on account of the total absence of the hind toe. The whole of these birds have nearly the same conformation, the same habits, and most frequently the same distribution of colours, which render it difficult to distinguish between them. ‘They are generally characterized by a long, slender, and feeble bill, which only permits them to bore in the mud in search of worms and sinall insects ; and the various slight modifications in the form of this beak enable us to arrange them into genera and subgenera. [We should observe that the distinction between this group and the Pressirostres is extremely vague, or rather, with certain reservations, that they compose but one series, plainly charac- terized by their anatomy. The sternal apparatus of the Knot Sandpiper (fig. 119.) may serve as a specimen of this portion of the skeleton throughout the whole, the few modifications which occur of it being inconsiderable. The stomach (save in the Bustards and Coursers, which in other respects are the least conform- able among them), is always a muscular gizzard, and the intestines long, with small or moderate coeca, and mvaria- bly a distinct ccecal remnant of the umbilical vessel. The females (except in the very few species of polygamous habit), are larger than the males, and they almost invariably lay four eggs on the ground, upon little or no nest, and dispose them with the small ends inwards; the young following their parents as soon as they burst the shell]. According to his own principles, Linnzeus should have classed most of these birds in his great genus of Tue Snipes (Scolopax),— Which we divide as follows, from trivial variations of the form of the bill. Fiz. 119 —Sternum of the Knot Sandpiper. Tue Ietses (Lbis, Cuy.). We separate these from the Tandali of Gmelin, on account of their beak, which, though arcuated as in nS GRALLZ. 243 the latter, is much more feeble, and devoid of emargination at the tip; besides which the nostrils, pierced towards the back and base, are prolonged in a groove which reaches to the end. This beak is also tolerably thick, and nearly square at the base, and some parts of the head or even of the neck are always bare of feathers. The external toes are considerably palmated at base, and the thumb suffi- ciently long to bear upon the ground. [The gradation is, in fact, quite imperceptible from these to the Tantals, and the anatomy and character of the plumage concur to show that both natu- rally pertain to the preceding division of Cul- trirostres : we believe the Ibises also build in society upon trees ; and there is certainly no trace of a passage from them into the Scolo- paceous birds.] Some of them have short and reticulated legs; and these are also more robust, and have a thicker bill. The Sacred Ibis (I. religiosa, Nobis; Abou Hannés, Bruce; Tantalus Asthiopicus, Latham), is the most celebrated species. It was reared in the temples of ancient Egypt, with a degree of respect bordering on adoration; and was embalmed after its death. This arose, according to some, from its devouring serpents, which would otherwise have multiplied to a noxious extent in the country ; while others are of opinion that it took its origin from some rela- tion between its plumage and one of the phases of the moon; a third class ascribing it to the fact that its appear- ance announced the overflow of the Nile. For along while, the African Tantal was believed to be the Ibis of the Egyptians, which is now ascertained to be a species of the division we are now treating of, the size of a Fowl, with white plumage,excepting the tips of the quill-feathers, which are black; the greater coverts [tertiaries] having elongated, slender, and loose barbs, of a black colour with violet reflections, and covering the extremities of the wing and tail. The beak and feet, together with the naked part of the head and neck, are black; and the latter clothed, in the young, at least the upper surface, with short black feathers.* It is found throughout Africa. Other Ibises have scutellated tarsi, and generally a more slender bill. The Scarlet Ibis (Scol. rubra, Lin.; Tantalus ruber, Gm.).—Remarkable for its bright-red colour all over, except the black tips of its wings. The young are at first covered with blackish down, becoming then ash- coloured, and whitish when they begin to fly: in two years the red makes its appearance, the brilliancy of which increases with age. It is found in the hot parts of America, and lives in marshy districts in the vicinity of estuaries ; does not migrate, and is easily rendered domestic. The Glossy Ibis (Sc. falcinellus, Lin.).—Body empurpled rufous-brown, with a deep green mantle; the young with the head and neck speckled with whitish. A resplendent species of the south of Europe and north of Africa, and probably that designated Black Ibis by the ancients. [It occurs rarely in the British Isles.] Fig. 120.—Sternum of Glossy Ibis. Tue Curtews (Numenius, Cuv.)— Have an arcuated bill like that of an Ibis, but more slender, and round throughout ; the tip of the upper mandible passing beyond that of the lower, and bulging a little downwards in front of it. The toes are palmated at base. The Whaup Curlew (Se. arcuata, Lin.).—Size of a Capon, and brown, with the margins of all the feathers whitish ; the croup white, and tail barred white and brown. It is tolerably good eating, and commen along our coasts, and as a bird of passage in the interior, [breeding in the upland moors of Britain: its plaintive whistle is well known along the sea-side, and has given rise to its name. ] The Whimbrel Curlew (Sc. pheopus, Lin.).—One half smaller, with nearly similar plumage. [Is not quite so common in Britain as the last, and breeds sparingly on our most northern hills. There are several others]. Tue Snipes, properly so called, (Scolopax, Cuv.),— Have a straight bill, with the nasal grooves extending nearly to the tip, which expands a little exter- nally to reach beyond the lower mandible, on the middle of which there is a simple furrow. The tip of the bill is soft and very sensitive, and drying after death presents a punctured surface. The feet are devoid of any palmature. A peculiar character of these birds consists in the compressed form of the head, and the backward site [at least in the larger species, with shorter tarsi], of their large eyes, which imparts a singularly stupid air, in conformity with their habits. * We helieve that all birds which have any naked parts in the adult state, have invariably the same feathered when voung.—Ep. R 2 244 AVES. (They fall into two natural subdivisions: the first that of the Woodcocks, with less slender form, shorter legs, and the tibia feathered to the joint ; colour resembling that of decayed leaves. ] The European Woodcock (Se. rusticola, Lin.).—Universally known, with handsomely mottled plumage. In the summer it inhabits high mountains, and descends into the woods in the month of October, where it is generally met with singly or in pairs, particularly in dull weather, and feeds on worms and insects. A few remain in the level country throughout the year. [The Snipes, commonly so called, are lighter-made, with longer legs, and tibia bare above the joint. They fre- quent marshy districts, and are coloured in adaptation to their abode. In Britain, we have three species, very similar in their colouring,—the Great or Double Snipe (Sc. major), which approaches in form to a Woodcock, and is only met with in the seasons of passage; the Common or Whole Snipe (Sc. gallinago), which breeds in considerable numbers on the northern hills, and is everywhere common in marshy districts during the winter; andthe Half or Jack Snipe (Sc. gallinula), a minute species, more richly coloured than the preceding, with much less tail: a fourth, the Sabine’s Snipe (Sc. Sabini), is extremely rare, and exceeds the Common Snipe in size, having dingy plumage, with no white upon it. All are highly esteemed for the table.] We should distinguish from the other Snipes The Grey species (S. grisea and Novoboracensis: [Macroramphus griseus, Leach), which is in truth a Tringa with a longer bill than usual, similar to that of the Snipes, and retains the gregarious habits and seasonal changes of colouring of the true Sandpipers and Godwits.}] Its front toes are semipalmated. This bird is common in North America aad occurs as a rare straggler on this side of the Atlantic. Tue RuyNncHEAns (Rhynchea, Cuv.)-— Are African and Indian birds, the mandibies of which are nearly equal, a little arched at the end, with the nasal grooves extending to the tip of the upper one, which has no third furrow. Their toes are not palmated. To the port of the Snipes, they conjoin more vivid colours, and are particularly remarkable for the ocellated spots which adorn the quill-feathers of their wings and tail. They are found of different medleys of colour, which Gmelin brought together as so many varieties of one species (Sc. capensis), and which Temminck also believes to be the same at different ages. One perfectly distinct has, however, been received from Brazil (Rh. hilarea, Val.) Tue Gopwirs (Limosa, Bechst.)— Have a straight bill, sometimes a little arcuated upwards, and still longer than in the Snipes, the nasal groove extending almost to the tip, which is rather soft and depressed, but without additional furrow, or punctation. The external toes are palmated at base. Their form is much more attenuated, and legs considerably more elevated, than in the Snipes, and they frequent salt marshes and the shores of the ocean [changing to rufous on the under-parts and partially above in the breeding season, as in many Sandpipers, to which their gregarious habits are more nearly related than to those of the Snipes. Two species are not uncommon on the British shores, viz., the Bar-tailed Godwit (ZL. rufa), which breeds more to the north, and abounds during the seasons of passage, and throughout the winter ; and the Black-tailed Godwit (L. melanura), which is much taller, with a longer bill, and (in old specimens) a pectinated middle claw; the distal half of its tail is black, and it does not acquire so bright a rufous in the spring. This bird breeds in the British marshes, and can pick up and subsist on barley, upon which numbers are fed that are brought from Hol- land to the London markets. There are several others. ] Tue Sanppipers (Calidris, Cuv.; Tringa,* Tem.)— Have the tip of the beak depressed, and the nasal furrow very long, as in the Godwits, but the mandi- bles in general are not longer than the head; their toes, slightly bordered, have no palmation at the base, and the back-toe hardly reaches to the ground; their legs but moderately elevated, and abbre- viated form, impart a heavier carriage than that of the Godwits. Their size also is much smaller. (The author separates his group Pelidna, merely on the character of having the beak a trifle longer than the head, a difference which in several species depends merely on age or sex; the females of all the present family having a proportionally longer beak than the males, besides exceeding them a little in stature. Numerous species are found, more or less regularly, on the British shores: the principal of which are—the Knot Sandpiper (Tr. canutus), the size of a Snipe, and ashy-grey above, white below, with some dusky spots on the breast in winter, suffused with bright ferruginous in the spring; bill short and straight ; it isa common species, and occurs in large flocks during the seasons of passage and through the winter, retiring further north to breed. The Purple Sandpiper (Tr. maritima), is smaller and less gregarious, and prefers rocky shores; back empurpled, the feathers margined with greyish during the winter. The rest are placed by the author in his Pedidna. The Purre Sandpiper (7%. variabilis), still smaller, with a rather longer and more arcuated bill, coloured in winter like « The latter name is generally adopted.—Ep. GRALL. 245 the first, and mottled with rufous above, and a black patch across the breast, in the breeding season: it is the commonest of all, and some breed on the upland moors. The Curlew Sandpiper (Sc. subarquata, Gin.; Numenius africanus, Lath.), resembles the Knot in colouring and seasonal changes, and the Purre in size, with a still longer and more-arcuated bill; it is not common, nor very rare, on the British shores. The Little Sandpiper (Tr. minuta) is considerably less than the last, with a short bill ; it acquires some rufous tints in the spring, on the upper parts and across the breast, and is certainly rare, though very much overlooked. Three or four others occur as strag- glers. These active-little birds take their food along the margin of the sea, following each retreating wave ; when gregarious in considerable flocks, and in their winter plumage, the whole show alternately their grey upper parts and white lower parts as they whirl in the air, producing a remarkable appearance, well known to those accustomed to wander by the sea side. ] THE SANDERLINGS (/4renaria, Bechst.; Calidris, Vigors)— Merely differ in the absence of hind-toe, like the Plovers. One only is known (Charadrius calidris, Gmelin), the size of a Purre, with analogous seasonal changes to those of the Knot Sandpiper. [It appears to be almost generally diffused, and is common on the British shores. | Tue Faxcine es (Erolia, Vieillot)— Have the beak rather more arcuated than in the Curlew Sandpiper, but do not, as has been asserted, want the thumb. We are acquainted with one only, (Sc. pygmea, Lin.), a bird proper to Africa, but which is occasionally found in Europe. Tue Rurrs (Machetes, Cuv.)— Are true Sandpipers by the bill and feet, except that the palmature of their outer toes is nearly as considerable as in the Gambets, Godwits, &c. One species only is known (77. pugnax,Lin.). Larger than a Snipe, and very celebrated for the furious combats which the males wage in spring for the possession of the females. At this epoch, the head becomes partly covered with red [or yellow] papillz, and the neck is furnished with a very considerable collar or ruff of lengthened feathers, so variously marked and coloured in different individuals, that two can hardly ever be found alike, and rarely much resembling each other. They have always yellow legs*, which, together with the semi-palmation of the toes, assists us to recognize them at all seasons. The species is common in the north of Europe, [and is remarkable for the male exceeding the female in size, at variance with the other members of this group, but in accordance with its polygamous habits. Vast numbers are brought from Holland to the London markets. } America produces some species nearly allied, as the Hemipalamus, Bonap.; or Tringa semipalmata, Wilson; {the habits of which are more allied to those of the Gambets, to which in fact they essentially belong). Near the Sandpipers should apparently be placed THE SpPATHE-BILL (Lurinorhynchus, Wilson) ,— Which is distinguished by a depressed bill, widened at the tip somewhat as in the Spoonbills, and the only species of which is The Platalea pygmea, Lin.; Eurinorynchus griseus, Wilson (Thun. Acad. Suec., 1816, pi. vi), which is one of the rarest birds in existence, as it is only known by a single individual, grey above and white beneath, and about the size of a Purre Sandpiper. [It has since been met with in northern Asia.] THE PHataropeEs (Phalaropus, Brisson),— Are small birds, the bill of which, more flattened than in the Sandpipers, is otherwise similar as regards its proportions and lateral grooves, and the toes of which are bordered with very broad membranes, as in the Coots. [Their lower plumage resembles in texture that of the Gulls.] The known species (77. lobata and Tr. fulicaria, Lin.), has a wide bill for a member of this family, and is in winter ash-coloured above, whitish below and on the head, with a black band upon the neck: it is then the Grey Phalarope (Tr. lobata, Edw.). In summer it becomes black, mottled with fulvous above, and of a deep reddish below [like the Knot Sandpiper, Godwits, &c.]: but at all seasons it retains a white spot on the wing, the rest of which is blackish. It is then the Red Phalarope (Ph. rufus, Bechstein and Meyer; 7’. fulicaria, Lin.). This bird is rare in Europe [not very so in the British Isles, during the season of passage, when individuals are occasionally met with swimming upon inland ponds, like a very diminutive Duck, and evincing little fear or shyness: they also occur in small flocks, and breed chiefly within the Arctic circle]. Tue Turnstones (S¢repsilas, Iliger),— Are rather lower on the legs, and have a short bill, and toes devoid of any palmature, like the true Sandpipers ; but their beak is conical, pointed, and without depression, compression, or inflation, and the nasal groove reaches only half-way. The thumb barely touches the ground. Their beak, rather * This is very far from being the case.—Ep. 246 AVES. stouter and proportionally less flexible than in the preceding, is used by them to turn over stones to search for the worms that lie beneath them. [Its form is not unlike that of a Nuthatch’s bill.] The two species doubtfully indicated by the author are merely the same in different states of plumage: it is a bird of remarkably wide geographic range, and tolerably plentiful on the British coasts: its affinitv is rather with the Oyster-catchers and Plovers]. THe Gambets (Totanus, Cuv.)— Ilave a slender, round, pointed, and solid beak, the nasal groove of which only extends half its length, and the upper mandible is slightly arcuated towards the tip. Their form is slight, and legs elevated: the thumb hardly touches the ground, and the palmation of their outer toe is well-marked. The species are each found nearly all over the world, [or rather, there are many difficult of determination apart, which has induced the latter opinion. | The Greenshank Gambet (Scol. glottis, Lin.).—As large as a [rather small] Godwit, with the beak comparatively stout, [and a little recurved] ; ashy-brown above and on the sides, with the margins of the feathers punctated with brown, the croup and belly white, and tail rayed with narrow irregular bars grey and white ; the feet green: in summer the throat and breast are spotted with dusky tears, which disappear after the breeding season. This is the largest species of Gambet in Europe. [It breeds on the margins of lakes, including those of Britain, and during the season of propagation is very clamorous, rising on the wing and spreading an alarm at the approach of danger to all other birds within hearing: in winter it resorts to the sea-shore in small flocks, apparently the amount of broods. The Greenshank is a characteristic example of a particular group, the members of which are comparatively large, acquire more or less of a dusky colour on the under-parts towards the breeding season, and agree in their general habits, mostly frequenting fresh-water lakes. An allied species of North America (Tot. semi- palmatus) has the toes half-webbed, and has been known to occur in Europe as a straggler. The Dusky Gambet (T. fuscus) is another European species, more delicately formed, with particularly slender beak and feet, and beautifully barred tail and coverts, which becomes entirely suffused on the under-parts with fuliginous-black in the spring, and is rare in Britain. A fourth (7. calidris), the Redshank Gambet, is very abundant in Britain, breeding also not uncommonly in marshes near the sea-shore, and especially about the estuaries of rivers. Others acquire no colour on the under-parts in spring, and mostly breed in the marshes, where they trip across the broad floating leaves of aquatic plants with grace and agility: such are, particularly, those with longer legs, as the delicate Wood Gambet (7. glareola), which is sometimes found in Britain, the T. stagnatalis, Bechst., of eastern Europe, and 7. chloropygius of North America: one more common in this country, with shorter legs, and a conspicuous white rump as it flies, is the Green Gambet (T. ochropus), which conducts into the next minor group. The others, at least those of Europe, are still smaller, and familiarly known as Summer Snipes in England. One very common may be termed the Common Gambet (7. Aypoleucos), which in America is represented by a species with a breast spotted like that of a Thrush (7%. macularia). Another in Europe, still more diminutive (7. Tem- minckii or pusilla), has been generally classed with the Sandpipers, but strictly appertains to the present group both in structure and habits, being never found on the sea-shore, but frequenting inland waters like its true congeners, allof which jerk the tail and nod the head frequently as they run about, and emit a clear whistling note. There are many others in foreign parts. ] Tue Loseroor (Lobipes, Cuv.),— Which we consider ought to be separated from the Phalaropes, which it resembles in the lobation of its toes, is distinguished from them by its bill, which is that of a Gambet. Such is The Red-necked Lobefoot (Tringa hyperborea, Lin.).—A little bird, grey above, white below, tinted with rufous on the scapularies, and having a broad red gorget round its white throat. Add the Phalaropus frenatus, Vieillot ; or Holopodius [Wilsonii] of M. C. Bonaparte, [which is found in America generally. The first-named species breeds in the northern isles of Scotland, inhabiting marshy grounds, where it cannot be obtained without much diffi- culty, though far from being timid in its disposition]. Tue Sritts (Himantopus, Brisson)— Have a round beak, slender and pointed, even more so than in the Gambets ; the grooves of the nostrils extending only half-way. But what particularly distinguishes them, and has given origin to their name, is the inordinate length and ‘slenderness of their legs, which are reticulated and destitute of hind-toe, and the bones of which are so feeble as to render walking painful to them. Fig. 121.—The Stilt But one species is known in Europe (Charadrius himantopus, Lin. ; [H. Plinii, Auct.|; which is white, with a black calotte and mantle, and long red legs. It is rather rare, and little is known of its manners. [The latter GRALLZ. 247 bear a near resemblance to those of the Avocets, with which this genus is even linked by an intermed ate species, which conjoins the webbed toes of the latter with the beak of the Stilts (the H. palmatus, Gould, a native of Australia). There are three or four normal species, and both this and the next genus are aimost generally dif- fused, frequenting muddy estuaries in winter, and salt-marshes during the season of propagation]. We can scarcely place otherwise than here Tue Avocets (Recurvirostra, Lin.),— Although their feet, which are webbed nearly to the ends of their toes, almost entitle them to rank among the Swimming-birds; but their lengthened tarsi and half-naked tibiz, their long, slender, pointed, smooth, and elastic bill, and the mode of life which results from their conformation, concur to approximate them to the Snipes. What particularly characterizes them, and distinguishes them even from all other birds [if two remarkable species of Humming-bird be excepted, the Trochilus recurvirostra and Tr. avocetta], is the strong upward curvature of their beak, [the mandibles of which have often been compared to two thin slips of whalebone]. Their Jegs are reticulated, and thumb too short to reach the ground. That of Europe (R. avocetta, Lin.) is white, with a black calotte and three bands of the same upon the wings, and leaden-coloured legs. It is a handsome bird, of attenuated form, which frequents the sea-shore in winter, {where it feeds by scooping (as it is termed), with its singular bill, drawing this through the mud or sand from right to left as it advances its left leg foremost, and vice versd, seizing whatever living prey is thus met with. Its manners in the breeding season resemble those of the Gambets, rising on wing and emitting its cry at the approach of any intruder; it collects, however, a greater quantity of nest than is usual among the wading-birds, the majo- rity of which pertaining to the present group merely lay in some slight hollow. There are three or four other species}. The family of MAcRODACTYLI Are furnished with very long toes, adapted for traversing aquatic herbage, or even for swim- ming, in those numerous species which have them bordered, [and not these only]. There are no membranes, however, connecting the bases of their toes, not even the two outer ones. The beak, more or less laterally compressed, is lengthened or shortened according to the genus, without ever attaining the degree of feebleness and attenuation which is characteristic of the preceding family. The body of these birds is also singularly compressed, a conforma- tion resulting from the narrowness of the ster- num (fig. 122) ; their wings are short or mode- rate, and their flight feeble. [The females are mostly larger, and in some instances excel the males in brightness of colouring; and they pro- duce numerous speckled eggs, having a reddish clay ground-colour, the young running soon after they are hatched, being then covered with a rigid, black, hair-like down: their ery is gene- rally abrupt and croaking]. They have been divided into two tribes, ac- cording to the presence or absence of any arma- ture on the wings; but this character is subject to exception. Tue Jacanas (Parra, Lin.)— Are conspicuously distinguished from all other Stilt- birds by the extraordinary length of their four toes, which are separated to the base, and the claws of which, more particularly that of the back-toe, are extremely long and sharp-pointed. ‘The bill resembles that of the Lapwings by its medium length and slight bulge towards the tip, and the wing is armed with a spur. They are noisy and quarrelsome birds, which reside in the marshes of hot climates, where they walk with facility on the floating leaves of aquatic plants, by means of their long toes. [They are essentially modified, however, upon the type Fig. 122.—Sternum of Corn Crake or Land Rail. 248 AVES. of the preceding group, which is traceable in their whole anatomy ; and are nearly allied to certain Lapwings, which we believe they also resemble in the number and character of their eggs. ] America produces some species which have a flat naked membrane at the base of the bill, which is reflected over part of the forehead. As The Common Jacana (P. jacana, Lin.).—Black, with a rufous mantle; the primary wing-coverts green; and fleshy wattles under the beak. It is the commonest of those inhabiting the hot climates of « merica, and has very sharp spurs. Some of the same kind are found in Asia, as The Bronzed Jacana (P. enea). The body black, changing to blue and violet, a bronzed-green mantle, blood- red croup and tail, the anterior wing-feathers green, and a white streak behind the eye. Its spurs are small and blunt. Others have been discovered in the east in which this membrane does not exist, and which are otherwise remarkable for some singular differences in the proportions of their quill-feathers. As The Long-tailed Jacana (P. sinensis)—Brown, with the head, throat, fore-neck, and wing-coverts, white, the hind-neck adorned with silky feathers of a golden-yellow colour, and a small pedicillated appendage to the tips of some of the quill feathers. There is one also in the east which is crested, and has no spurs to the wings, (the P. gallinacea, Tem.). THE ScrEAMER (Palamedea, Lin.)— Resembles the Jacanas, but on a very large scale, by the two stout spurs which it bears on each wing, and by its long toes and strong claws, more particularly that on the hind-toe, which is long and straight as in the Larks; but its beak, which is slightly cleft, is neither much compressed nor bulging, and its upper mandible is a little arcuated. The legs are reticulated. The species known, the Horned Screamer (P. cornuta), termed in Brazil Anhima, and Camouche in Cayenne, is larger than a Goose, and blackish, with a rufous spot on the shoulder, the top of its head bearing a singular orna- ment, consisting of a long and slender, moveable, horny stem. Its toes have no palmation. This bird inhabits the inundated grounds of South America, and its very loud voice is heard afar off. It is strictly monogamous: is said to pursue reptiles; but although its stomach is only slightly muscular, it scarcely feeds on any thing but aquatic herbage. [The trachea of this bird has an abrupt bony box or enlargement about the middle, somewhat analogous to that of the male Velvet Pochard (Oidemia fusca) }. A distinct genus has been made of THE CuHauna (Opistolophus, Vieillot),— Which has no horn on the vertex, but the occiput is adorned with a circle of erectible feathers. The head and upper part of the neck are only covered with down, and it has a black collar. A singular phenomenon is exhibited by the circumstance of its skin, even that covering its legs, being inflated by the interposition of air between it and the muscles, so that it crackles under the finger. It is the Parra chavaria, Lin. The rest of its plumage is lead-coloured and blackish, with a white spot at the bend of the wing, and another at the base of some of the large primaries. There is a tolerably well-marked palma- ture between its external toes. It feeds principally on aquatic herbage ; and the Indians of Carthagena rear some among their flocks of Geese and Poultry, as they deem it very courageous, and capable of repulsing even a Vulture. Near to the Screamers we think should be placed, although they have scarcely any naked space above the tarsal joint, Tue Mecaropes (Megapodius, Lesson),— A genus recently discovered in New Guinea, with a vaulted beak, a little compressed, the membranous nostrils occupying about half its length, and very stout and elevated tarsi, which are scutellated, the toes (including the hind one) being long, and terminated by claws which are rather flat. They have a short tail, a naked space round the eye, and there is a small tubercle on the carpus, the first and slight vestige of the spur of the Screamer. The membrane between their external toes is very slight, while that of the inner is rather larger. They lay disproportionately large eggs for their size. One species is crested nearly as in the Chauna (M. Duperreyi, Lesson) : two others have no crest; and a fourth has scarcely any tail. In the tribe wherein the wings are unarmed, Linnezus comprises, under the genus Fulica, all such as have the bill continued backward into a sort of shield, that covers the forehead ; and those which do not possess this character he arranges in the genus Rallus. Se ee EE eee ee SS eee ee GRALL. 249 Tue Rarts (Rallus, Lin.),— Which bear, in other respects, a very strong mutual resemblance, have bills of very different pro- portions. Among the species in which it is longest, Tue Rats (Rallus, Bechstein),— May be first mentioned. The European Rail (R. aquaticus, Lin.).—Olive-brown, marked with black above, bluish-ash-colour beneath, with some narrow black and white rays crossing the flanks. This bird is common in our ponds and ditches, where it swims well, and runs lightly upon the leaves of aquatic herbage, feeding on small Crustaceans. {Its frontal feathers are rigid, in place of the shield of the Coots and Gallinules. There are various others, all extra-European. ] Other species, Tue Craxes (Crex, Bechstein),— Have a shorter bill, as observed in The Corn-Crake (R. crex, Lin.).—Of a reddish-brown colour, marked with blackish above, and greyish below, with dull black rays crossing the flanks ; the wings rufous. It lives and nestles in our fields and meadows, and runs with great swiftness among the long grass. The Latin name, Crew, is expressive of its cry. It feeds on corn, in addition to worms and insects. {The following species, or Tue Soras (Zapornia, Stephens) ,— Have an intermediate beak, and resemble the Rails in their aquatic habits. ] The Speckled Sora (R. porzana, Lin.).—A deep brown, speckled with white, and whitish rays on the flanks. It is a good swimmer and diver, and does not leave France till the middle of winter. [There are two smaller kinds in western Europe, including the British Isles; the Baillon’s Sora (Z. Baillonii), with somewhat speckled plumage; and the Little Sora, as it is termed, though surpassing the last in size, (Z. pusilla), the plumage of which approximates that of the Common Rail. Of various exotic species, some are considerably larger than the Crake and Rail of Europe]. THE Coots (Fulica, Lin.) — May be subdivided in the following manner, according to the form of the beak, and the membranes margining the toes. THe GALLINULES (Gallinula, Briss. & Lath.)— Have the beak nearly as in the Crakes, but distinguished by the frontal shield, and by longer toes, bordered with a narrow membrane. The Common Gallinule (G. chloropus, Lin.).—Deep olive-brown above, slaty-grey below, with some white on the sides, [the feet green, with a red and yellow cincture above the tarsal joint, and the frontal shield bright red: these lively colours being much more conspicuous in the female, which is larger also than her mate. A very common species throughout Europe, and considered to be of universal diffusion, as specimens from the most distant regions are undistinguishable]. Tue Sutranas (Porphyrio, Brisson)— Have the beak higher in proportion to its length; and very long toes, with scarcely any perceptible border; the frontal shield considerable, and rounded in some, square above in others. These birds stand on one foot, while they employ the other to convey food to the beak. Their colours are gene- rally fine shades of violet, blue, and azure. Such is The Common Sultana (#ulica porphyrio, Lin.), a beautiful African species, now naturalized in several islands and countries bordering the Mediterranean. Its beauty would render it an ornament in our parks. Lastly, Tue Restricrep Coots (Fulica, Brisson)— Conjoin to a short beak and large frontal shield, toes that are much widened by a festooned border, which renders them excellent swimmers ; hence their lives are passed in pools and marshes. Their smooth plumage is not less adapted than the rest of their conformation to this mode of life, and they consequently exhibit a marked transition from the Wading to the True Swimming Birds, [though only in superficial or adaptive characters, which are principally external]. There is one in Europe (F. atra, aterrima, and ethiops, Gm.)—{Slaty-black, darker on the neck, with a flesh- coloured shield, which becomes white in the season of propagation. It is very easily tamed, and subsists on grain, pond-weed, and even small fish, diving with facility. ] 250 | AVES. We terminate this series of Stilt-birds by three genera, which it is difficult to associate with any others, and which may be considered as each forming a separate family. Tue SHEATHBILLS (Chionis, Forster)— Have short toes, nearly as in the Poultry, the tarsi scutellated, the beak thick and conical, and enveloped at base by a hard substance, which, it appears, the bird has the power of raising and depressing. We are acquainted with only one species, from New Holland (Ch. necrophaga, Vieillot), the size of a [large] Partridge, and entirely white. It frequents the sea shore, and feeds on dead animal matter thrown up by the tide. [Prof. Blainville has lately shown that this remarkable bird approaches very near to the Oyster-catchers in its whole anatomy, and the affinity is discernible on comparison of their external characters. Apparently allied are Tue Arracens (d¢tagis, d’Orb.),— The uncompressed bill of which nearly resembles that of a Poultry-bird, and the plumage is not unlike the immature dress of a Lark: wings and feet as in Chionis. Several species inhabit the Cordilleras of the Andes, varying in size from that of a Partridge to less than a Lark. The smaller constitute the Tinochorus of Vieillot.] Tue Prartincotes (Glareola, Gmelin) — Have a short, conical beak, arcuated throughout, and resembling that of a Poultry-bird. The wings excessively long and pointed, and tail often forked, producing the flight of a Swallow or Petrel. The legs are of mean length, the tarsi scutellated, the external toes a little palmated, and thumb reaching to the ground; [middle claw furnished with an obtusely serrated inner edge]. They fly in troops, and cry about the borders of water, subsisting on aquatic insects and worms. [Their sternal apparatus and anatomy intimate their position to be among the Snipes and Plovers.] The European species (GZ. torquata) is brown above, white below and on the croup; the gorget encircled with a black marking; and base of the bill and feet reddish. It appears to inhabit the north of the whole ancient world. Our last genus consists of Tur FLamincoss (Phenicopterus, Lin.),— Which are among the most extraordinary and isolated of birds, [being, in fact, an extreme modification of the Lamellirostral type, that is, of the Duck tribe, with inordinately elongated neck and legs]. Their legs, of excessive length, have their front toes palmated to the ends, and an extremely short hind- toe; the neck is equally long and slender with the legs, and their small head is furnished with a bill the inferior mandible of which is of an oval form, longitudinally bent into a semicylindrical canal, while the upper one, oblong and flat, is bent crosswise in the middle, so as to join the other exactly. The membranous groove of the nostrils occupies nearly the whole side of that part which is behind the sudden bend of the mandibles, and the nostrils themselves form a longitudinal slit at the base of the groove. The edges of the two mandibles are furnished with small and very fine transverse laminz, which, together with the fleshy thickness of the tongue, imports some relationship with the Ducks. We might even place the Flamingoes among the Palmipedes, were it not for the length of their tarsi, and the nudity of part of the tibia, [an objection which would equally apply to the Gulls and Petrels]. They feed on Testaceans, Insects, and the spawn of Fishes, which they seize by means of their long neck, reverting the head to employ with advantage the crook of the upper mandible. They construct their nest of earth in marshy situations, placing themselves astride of it [? ] during the act of incubation, in consequence of the extreme length of their legs incapacitating them from sitting in the usual manner. [The digestive organs resemble those of the Ducks with unlobated hind-toe ; having even the crop, or distension of the cesophagus, which occurs in no species strictly belonging to the division of Stilt-birds.] The common species (Ph. ruber) stands from three to four feet in height, and is ash-coloured, with brown streaks, during the first year; in the second there is a roseate hue on the wings, and in the third it assumes a purple red on the back, and rose-coloured wings. This species is found in all parts of the eastern continent below 40 degrees. Numerous flocks are seen every year on the southern coasts of Europe, and they sometimes ascend as far as the Rhine. M. Temminck thinks [and has since definitively ascertained] that the American Flamingo is distinct ; besides which, there is a small species on that continent (Ph. minor, Vieillot) of which the Pigmy Flamingo of Temminck is the young. PALMIPEDES. 251 [ Here, at the close of the great series of Ground-Birds, as of the Perchers, may be intro- duced a few brief remarks on the classification of these animals, as warranted by the present state of information. The divisions are not all so strongly characterized apart as the four principal groups or orders already specified ; but chiefly because certain genera stand forth from the rest, and will not (so far as we can perceive at present) satisfactorily range with any of the others. Preserving the same form of nomenclature as before adopted, as less objection- able than any other that we can devise, the various groups of Ground-birds (as the vast majority of the foregoing extensive series may be appropriately denominated,) fall into six principal divisions, which may be designated as follow : — V. Gemirores (Cooers)—the Pigeons; an order strongly characterized by the whole internal anatomy, and not less so by the outward conformation. It is perfectly distinct: from the contiguous orders, to which it is linked by no intrinsically connecting species. VI. Rasores (Ground-scratchers)—the Poultry: a group sufliciently cognizable in its totality, but not easy to subdivide im such a manner as to exemplify the relative value of its various genera. VII. Cursores (Runners) ; or the Brevipennes of Cuvier. VIII. Caucatrores (Stampers); or the Pressirostres and Longirostres of our author, comprising the numerous genera with soft and flexile bills, more or less prolonged, the greater number of which lay four eggs, which they dispose crosswise, &c. &e. The name alludes to the habit which many of them display, of stamping with the foot, to cause the worms on which they feed to rise. TX. Grapatores (Stalkers); or the Cultrirostres of Cuvier. X. Larirores (Skulkers) ; or the Macrodactyli. Each of these appears to us to constitute a distinct and natural order, possessing various distinguishing characters; and we suspect that every genus of Ground-birds will ultimately prove, when its characters have been sufficiently studied, to rank in one or another of them. As a whole, they form a series, analogous to those of the Perchers and Swimmers. ] THE SIXTH ORDER OF BIRDS,— THE PALMIPEDES,— Have the feet organized for swimming; that is to say, placed far backwards on the body, with short and compressed tarsi, and webbed toes. They are further characterized by a close and polished plumage, impregnated with oil, and by a quantity of down next to the skin, which pro- tect them from the water in which they pass most of their lives. They are the only birds in which the neck is longer than the legs, which is sometimes the case to a considerable extent, for the purpose of enabling them to search for food in the depths below, while they swim on the surface. Their sternum is very long, affording a complete guard to the greater portion of their viscera, and having on each side [generally] but one emargination, or oval foramen, filled up with membrane. They have most frequently a muscular gizzard, long ceeca, and a simple inferior larynx ; which last is in one family, however, inflated into a cartilaginous. cap- sule. [So many exceptions occur to the foregoing generalization respecting the stomach and ceeca, that it might advantageously have been omitted. ] This order subdivides tolerably well into four families, of which that of Tue Divers (Brachypteres)— Presents, in certain of its species, some [very superficial] tokens of relationship with the Galli- nules. The position of their legs, which is farther backward than in any other birds, renders walking difficult, and obliges them to maintain, when upon land, an upright attitude. As the 252 AVES. greater number of them are also feeble flyers, and several are quite deprived of that faculty, in consequence of the shortness of their wings, they may be regarded as exclusively attached to the surface of the water: their plumage 1s particularly dense, and its surface frequently polished, presenting a silvery lustre. They swim under water by the aid of their wings, which are employed as fins. Their gizzard is tolerably muscular; the cceca of moderate length. They have only one special muscle on each side of their lower larynx. Such are Tue Loons (Colymbus, Lin.),— Which are characterized by a smooth, straight, compressed, and pointed bill, with linear nostrils ; but require to be subdivided from characters derived from the feet [the entire skeleton, character of plumage, propagation, &c. &c.] Tue Greses (Podiceps, Latham; Colymbus, Brisson and Illiger),— Instead of ordinary webs between the toes, have the latter widened as in the Coots, and the anterior connected only at base by membranes, [which border the remainder]. The claw of the middle toe is flattened ; the tarsi exceedingly compressed. The semi-metallic [or satiny ] lustre of their lower plumage has led to the occasional employment of it as fur. Their tibia, as also that of the Loons [in which it is much more pro- duced,] is prolonged forwards beyond the joint, to give a more efficient insertion to the extensors of the leg. ([Sternum (fig. 123)* very short, and of peculiar conformation, approaching in some respects to that of the Cormorants; which these very singular birds also resemble in the character of their eggs, the hard shell of which is invested with an ab- sorbent chalky substance. They have no vestige of a tail. The young are clad in exquisitely soft down, which is striped black and white, as in the Emeu. The constant number of cervical vertebra is nineteen instead of thirteen, as in the restricted Loons; and their skeleton is altogether 4 extremely different. ] i These birds reside in lakes and ponds, and nestle among the rushes, [producing numerous eggs, whereas the Loons lay very rarely more than two]. It appears that under certain circumstances they carry their young under their wings. Their size and plumage change so much with age [the latter rather according to season], that naturalists have very much multiplied the species. M. Meyer reduces those of Europe to four, [instead of five, which is the right number, as follow] :— Fig. 123.—Sternum of Grebe. The Crested Grebe (P. cristatus).—As large as a Duck, and satiny-white, with dusky upper-parts, acquiring with age a double black crest, and rufous collar edged with black, [which exist only during the breeding season]. The Red-necked Grebe (P. rubricollis).—Smaller, with the neck bright rufous, and greyish collar less developed. The Horned Grebe (P. cornutus) {and Eared Grebe (P. auritus).—Still less, and precisely of the same size with each other, so that they can only be distinguished, when the seasonal collar falls, by the beak of the second being distinctly a little recurved, and by a difference in the colour of the iris of the recent specimen ; their collars, how- ever, during the breeding season, are very different, and that of the Eared Grebe is less developed than in the other]. The Little Grebe (P. minor).—Size of a Quail, with never any crest or collar. [These various species, notwith- standing the shortness of their wings, can fly with considerable speed, when they once fairly rise, which they do with unwillingness, and seldom except when compelled to migrate. They can walk with their feet, and do not trail upon the belly, like the Looms ; and when under water, they make more use of their wings than the latter do habitually]. Tue Finreet (Heliornis, Bonaterre ; Podoa, Uliger)— Have feet lobed as in the Coots and Grebes, but their tail is more developed than in either, and their claws sharper. Such is Plotus surinamensis, Gmelin; and Heliornis senegalensis, Vieillot, which Gmelin approximated to the Anhingas. Tue Loons (Colymbus, Latham ; Mergus, Brisson; Eudytes, Uliger),— With all the [external] form of the Grebes, have the feet webbed in the ordinary manner ; that is to say, their three front toes are connected by membrane to the tips, and are all terminated by * The representation (fig. 123), in other respects accurate, is somewhat too long.—Ep, ccc eepemneseeeeemeeee essere eee rr ee PALMIPEDES. pointed nails. They are northern birds, which rarely nestle with us, and visit these latitudes in winter, when they are not uncommon upon our coasts. [They have large wings, and fly strongly, but in consequence of the position of the feet, the tibia being quite buried within the integuments, are unable to walk, though they push themselves forward with facility and tolerable speed, trailing upon the belly. They have a short tail, on the tripod of which and the feet they are enabled to stand upright, and take a wide view around them by means of their long neck: they utter dismal howlings ; and produce large spotted eggs, two or three in number, which are extremely unlike those of the Grebes. “ Three species are weil known, the whole of which are not rare in Britain. One, as large as a Goose (Col. gla- cialis), the Collared Loon, black above, beautifully spotted with white, with a nearly perfect collar of the same round the neck, and a black head. The second, (C. glacialis), the Black-throated Loon, extremely variable in size, but always smaller than the preceding, with a fuli- ginous grey head, and larger white spots on the upper parts: both of which species have the immature plumage dusky above, with greyish edgings to the feathers: and the Red-throated Loon (C. septentriunalis), still smaller and much commoner, the winter dress of which (and not the immature plumage, which resembles that of the others, is speckled above with numerous small whitish spots bordering the feathers, which wear off in spring, leaving the back spotless blackish ; coincident with which change of appearance, a rufous patch appears in front of the neck. All three are great destroyers of fish, and proceed with extreme swiftness under water, in general making little use of their wings to assist their progress. They are common to the northern regions of both continents, as are also the four first-mentioned Grebes.] Tae Guittemors (Uria, Brisson & Illiger),— With the general form of the beak of the preceding, have it covered with feathers as far as the nostril, and emarginated at the tip, which is a little arcuated. Their principal distinction, however, consists in wanting the back-toe. Their wings, much shorter than those of the Loons, barely suffice for the function of flying. They feed on fish and crustaceans, and are found about the precipitous rocks on which they breed. [These birds, the first of which is merely an Auk with a more slender bill, fly with considerable swiftness in a straight line, their wings being reduced to the minimum extent adequate for aerial support, in order that they might be more efficient under water, where no use whatever is made of the feet, which are held out like those of a wading bird when cleaving the air. Ac- cordingly they literally fly under water, whereas the subaquatic progression of a Grebe more resembles that of a Frog, and the Loons do not generally use the wings at all: hence the prolongation forward of the fixed patella, so considerable in the Loons, which is reduced in the Grebes, and entirely wanting in the Auks, Puftins, and Guillemots, which form a particular group, found only in the ocean. ‘The latter have also smaller coeca, a particularly tough cuticular lining to the stomach, of a bright yellow colour, a different sternal apparatus, which most nearly approximates that of the Loons, diverse plumage and seasonal changes, &c. They are pre-eminently remarkable for the manner in which the skeleton incloses the viscera as in a box, in order to resist the pressure of deep water ; while their air-cavities are unusually large, which causes them to float very high when on the surface, and are obviously designed to increase the standard of respiration so as to permit of their sustaining themselves in the air with their short and narrow wings, these, however, not being violently beaten in the act of flying. Their movements under water precisely resemble those of the Dyticide, or common Water Beetles; the principal motion being more or less vertical, in- stead of horizontal as in the Grebes and Loons: they are, therefore, together with the distinct group of Penguins, the most characteristic divers of the class. One common on the precipitous coasts of all Britain, is the Common Guillemot (U. troile), of a dusky slate-colour above, white beneath, and a bar of the same on the wing, formed by the tips of the secondaries; the throat black in summer, white in winter. It lays only one egg, of enormous proportional magnitude, ana remarkably variable in colour. ‘The young at first resemble the adults in summer dress; but their first plumage, which succeeds the down, and the texture of which is singularly delicate, presents the colouring of the adult winter-garb, and is exchanged for the latter in the course of a few weeks. They breed in vast numbers on the narrow ledges of rocks, where in many places they are seen sitting in successive rows, one over another. In autumn they migrate southward, those which breed on the British shores being replaced by others from more northern latitudes. Another and smaller species, is the Black Guillemot (U. grylle), entirely black, with a great white wing-spot. in Fig. 124.—Sternuin of Loon. Fig. 125.—Sternum of Guillemot. 254 AVES. summer, and everywhere mottled with white in winter: the bill and feet red. Its range is more northerly, rarely if ever breeding to the southward of the Scottish Isles, and producing two and often three eggs, proportionally smaller, and singularly different from those of the other, both in shape and colour. It is less allied to the Common Guillemot than the latter is to the Auks, with which an intermediate species, rarely found on the British coasts, tends even to connect it,—the U. Brunnichii, which scarcely differs except in the more robust form of the bill. There is also a breed of the Common Guillemot found on the Welsh coast, and some other places, which has a narrow white line from the bill to the eye, as in the Razor-billed Auk. } Tue Rorcue (Cephus, Cuv. [Mergulus, Ray and Vieillot] ),-— Has a shorter bill, more arcuated above, and unemarginated ; the symphysis of the lower mandible extremely short. Its wings are stronger, and the membranes of the feet somewhat notched. The known species, termed Little Auk and Greenland Dove, (C. alle ; Colymbus minor, Gmelin), is not larger than a Pigeon, and black above, white below, with the same mark on the wing as the Common Guillemot. It inhabits the arctic shores, where it breeds on the ground, and is occasionally met with in our latitudes during the winter. The genus of Tue Avuxs (Alea, Lin.) — Is known by its extremely compressed beak, raised vertically, sharp along the ridge, and ordinarily grooved on the sides, together with its feet entirely palmated and without back toe, the same as in the Guillemots. The species are all from the northern seas. They require to be divided into three subgenera. Tuer Purrins (Fratercula, Brisson ; Mormon, Iliger),— Of which the beak, shorter than the head, is as high or higher than it is long, giving it a very extraordinary form, while its base is generally furnished with a folded skin. The nostrils, placed near its edge, are mere slits. Their short wings can just sustain them for a brief period, and they reside in the ocean like the Guillemots, and nestle in the rocks, [or rather they burrow holes in loose soil, and lay their single egg at the depth of several feet. They run or creep swiftly on the ground, and the Auks and Guillemots can also waddle with more speed than might be anticipated from the shortness of their legs]. The common species (Alca arctica, Lin.; Mormon fratercula, Tem.), is a littie larger than a Pigeon, with black mantle, calotte, and collar, and the rest white. [Legs orange; bill brightly coloured; and a slip of loose skin at each eye. It is common in suitable localities on the British shores, flies rapidly, and may often be seen to return to its mate or young, with a number of small fishes curiously ranged on each side of its bill, each held by the head. The young are at first covered with long and flocculent black down, which is replaced by delicately soft plumage analogous to that of the young Guillemot, succeeded by the adult garb in the course of a few weeks, which last undergoes no seasonal changes]. M. Temminck distinguishes as Tue Puaverins (Phaleris, Tem.), Those species which have the beak less elevated; as, The Alca cristatella, Vieillot, and A. psittacula, Pallas. [Six species are known on the arctic shores of America, one forming the Ceratorynchus, Bonap. ; some of these extend to the north of Siberia. ] Tue Resrricrep Auxs (dica, Cuv.)— Have a more lengthened beak, resembling the blade of a knife; feathers at its base as far as the nos- trils, [the same as in the Guillemots, to which they are most nearly allied,] and wings decidedly too small to support them, inasmuch as they cannot fly at all; [an erroneous statement respecting one of the two species]. The Razor-bill Auk (Alca torda and pica, Gmelin). [Plumage and seasonal changes of the Common Guillemot, only that the black is more deep, and some white transverse lines on the bill. It is rather smaller than that spe- cies, which it exactly resembles in habit and extent of wing, flying equally well: inhabits the same cliffs, but less numerously ; and commonly lays two eggs, sometimes three, of similar character to those of the Black Guillemot : has a croaking voice. } The Great Auk (A. impennis, Lin.).—Colours of the preceding, but the beak marked with eight or ten cross grooves, and an oval white spot between the eye and bill. It lays but one great egg, spotted with purplish. [This species, which is larger than a Goose, is the only northern sea-fowl utterly deprived of the function of flight, and has accordingly its wings reduced to exactly that size which is most efficient of all for subaquatic progression : they are not larger than very moderate-sized fins, and the limb-bones are considerably weightier and less solid than those of its congener; but we are not aware that the skeleton makes any approach in form to that of the PALMIPEDES. 255 Penguins of the southern hemisphere, which are very distinct from the ¢uks. As a particularly rare visitant, this species is allowed a place in the British Fauna. ] The genus of Tue Pencuins (Aptenodytes, Forster) — Ts even less capable of flying than that of the Auks. Their little wings, covered with mere vestiges of feathers, which at the first glance resemble scales; their feet, placed farther back than in any other bird [the Grebes and Loons, alone excepted, ] only support them by bearing on the tarsus, which is widened like the sole of the foot of a quadruped, and in which are found three bones soldered together at their extremities. They have a small hind toe, directed inwards, and their three anterior toes are joined by an entire membrane. These birds are found only in the antarctic seas, never going on shore except to breed. They can only reach their nests by trailing on their bellies. The difference in the bill authorizes their division into three sub- genera. Tue PrncGurns, properly so called (Apteno- dytes, Cuv.),— Have a long, slender, and pointed beak, the upper mandible a little arcuated towards the tip, Fig. 126.—Sternum of Penguin. and feathered for about a third of its length; in this the nostril is placed, from which a groove extends to the tip. The Patagonian Penguin (Apt. patachonica, Gm.).—Size of a Goose, and slate-coloured above, white underneath, with a black mark, encircled by a citron-yellow cravat. It inhabits the vicinity of the Straits of Magellan in large flocks, ranging as far as New Guinea. Its flesh, although black, is eaten. THE Gorrews (Catarrhactes, Brisson)— Have a stout and pointed beak, somewhat compressed, with a rounded ridge, and tip a little arcuated ; the groove which extends forward from the nostril terminates obliquely on the inferior third of its edge. The Crested Gorfew (Apt. chrysocoma, Gm.).—Size of a large Duck, black above, white below, and adorned with a white or yellow crest on each side of the occiput. It is found in the vicinity of the Falkland Isles and of New Holland, and sometimes leaps out of the water while swimming. Deposits its eggs in a hole of the ground. There are several others. THE SPHENISCANS (Spheniscus, Brisson)— Have a straight and compressed beak, irregularly furrowed at the base; the tip of the upper mandible hooked, and of the other truncate ; nostrils situate in the middle, and uncovered. The Cape Spheniscan (Apt. demersa, Gmelin).—Black above, white below, the beak brown, with a white band in the middle, throat black, and a line of the same upon the breast, which is continued along each flank. It chiefly inhabits the neighbourhood of the Cape, where it nestles among the rocks. [Fig. 126 represents the sternal appa- ratus of this species, showing the peculiar configuration common to the group, and particularly the broad scapula, The bones of the Penguins are permanently filled with marrow. ] The family of LONGIPENNES Comprehends those Birds of the high seas, which, in consequence of their capability of pro- tracted flight, are met with everywhere, [though it does not appear that the particular species are more widely diffused than others]. They are known by the freedom or total absence of the thumb, their very long wings, and smooth-edged beak, which in the greater number of genera is hooked at the tip, and in the others simply pointed. Their inferior larynx has only one muscle proper on each side, and the gizzard is muscular [or lax and very capacious], the cceca short [or moderate ]. Tue Perrets (Procellaria, Lin.)— Have the beak hooked at the tip, with its extremity appearing as though a piece had been articulated to 256 AVES. the rest; their nostrils are united to form a tube, which lies along the back of the upper mandible ; and their feet, instead of a back toe, have merely a claw implanted in the heel. They are, of all the Pal- mipedes, those which remain most constantly at a great distance from land; and when a tempest comes on, they are often compelled to seek refuge on reefs and ships, from which circumstance they derive their name of Storm-birds: that of Petrel (a diminutive of Pefer,) has been applied to them from their habit of walking on the waves, which they do with the assistance of their wings. They nestle in the holes of rocks, [producing but a single egg,] and spurt upon those who disturb them an oily fluid, with which their stomachs appear to be always filled. The greater number of species inhabit the Antarctic seas. [Their stomach is extremely capacious, and but slightly muscular, and they feed principally on oily substances. ] Those are more particularly called Petrels (Procellaria), the lower mandible of which is truncated. The largest species, or Giant Petrel (Proc. gigantea), inhabits the Austral Seas, and exceeds a Goose in size. Its plumage is blackish, but with varieties more or less white. In the same seas is found The Spotted Petrel (Pr. capensis).—Size of a small Duck, and white, spotted with black above. It is often mentioned by navigators [as the Cape Pigeon]. The Fulmar Petrel (Pr. glacialis).—White, with ash-coloured mantle, the bill and feet yellow, and size that of a large Duck. It nestles in the precipitous coasts of the [northern] British isles, and is found throughout the whole north. [It has been computed that this species is the most numerous in individuals of the whole class. Though rare in our latitudes, its numbers in the Arctic seas are inconceivable. } Tue Srorm-Petrets (Thalassidroma, Vig.)— Are certain small species, with a somewhat shorter bill, rather longer legs, and black plumage, which are more particularly designated Storm-birds [and Mother Carey’s Chickens| by mariners. [Their habits are crepuscular and nocturnal, as are also those of most of the tribe: and their flight considerably resembles that of a Swallow. ] The most common (Proc. pelagica, Brisson) is scarcely larger than a Lark, but stands higher on the legs. It is entirely brown-black, except the croup, which is white, and there is a trace of white on the greater wing coverts. When this bird seeks a shelter upon vessels, it is a sign of an approaching storm. [That of America (Ph. Wilsonii) is Baye ceemereior Stommie Sie distinct, and is sometimes met with on our shores; as is also a third species with a forked tail, Th. Bullockii. After tempestuous weather, these birds are not unfrequently found far inland, generally upon the high road, unable to rise]. We separate, with Brisson, by the name of Tue SHEARWATERS (Puffinus),— Those species in which the tip of the lower mandible is curved downwards, like that of the upper, and the nostrils of which, although tubular, do not open by a common orifice, but by two distinct holes. Their beak also is proportionally longer. The Cinereous Shearwater (P. cinereus ; Proc. puffinus, Gm.)—Ash-coloured above, whitish beneath, with the wings and tail blackish; the young rather more deeply coloured. Its size is nearly that of a Crow, and it is found almost everywhere, [but rarely so far north as on the British shores]. A smaller species was long confounded with it, black above and white below, the Manks Shearwater (P. anglo- rum), which inhabits the northern shores of Scotland and its isles in immense numbers, and which the inhabitants salt for winter provision. [A third (P. obscurus, Vieillot) has occurred in Britain, and there are two or three more, further south. ] Navigators sometimes mention, under the name of Petrels, certain birds of the Antarctic seas, which should make two particular genera. One is Tue Hataprome (Haladroma, Illiger),— Which, with the beak and form of the Petrels and Shearwaters, has a dilatable throat like the Cormo- rauts, and entirely wants the thumb, as in the Albatrosses. Such is Pr. urinatrix, Gmelin. The other is i PALMIPEDES. 257 Tue Prions (Pachyptila, Iliger),— In other respects similar to the Petrels, have separate nostrils like the Shearwaters, and the beak widened at its base, its edges being interiorly furnished with fine, pointed, vertical lamin, analogous to those of the Ducks. These are the Blue Petrels (Proc. vittata and cwrulea, Forster). Tue A.Barrosses (Diomedea, Lin.)— Are the most massive of all aquatic birds. Their large, stout, and trenchant beak, with strongly marked sutures, is terminated by a hook, which looks as if articulated. The nostrils resemble short rolls, laid on each side of the beak; and the feet have no hind toe, not even the little nail which is found in the Petrels. They inhabit the Austral seas, and feed on the spawn of Fishes, Mollusks, &c.; [indeed, upon whatever falls in their way. They pertain to the same particular group as the Petrels, which they resemble in their whole anatomy. Their webbed feet are equally large, and they have the same habit of trampling on the waves]. The species best known to navigators, or the Giant Albatross (D. exulans, Lin.), has been termed the Cape Sheep from its size, having white plumage, and black wings. The English also style it the Man-of-War Bird, [a mistake, as this term applies to the Tachypete]. It is particularly common beyond the tropic of Capricorn, and is the great enemy of the Flying Fish. This bird constructs a high nest of earth, and Jays numerous eggs [each individual, however, one only, and generally in company with Penguins], which are esteemed good eating: its cry is very loud. There are three or four others, about two-thirds the size. Tue Gutts (Larus, Lin.)— Ilave the bill moderately long, compressed, and pointed, the upper mandible arcuated towards the tip, and the lower forming a projecting angle beneath. Their nostrils, placed near its middle, are long, narrow, and pierced quite through, [the beak having little bony substance in comparison with those of the Petrels and Albatrosses]. .Their tail is full, the legs tolerably elevated, and the thumb short. They are cowardly and voracious birds, which abound along the sea-shore, and feed on all sorts of fish, carrion, &c. They nestle in the sand or in clefts of rocks, and lay few eggs, [generally three in number]. When they come inland, bad weather may be expected. Several species of them are found on our coasts; and as their plumage varies exceedingly with age, they have been further multiplied by systematists. In general, during youth, they are mottled with greyish. [These birds have a capacious guilet, and small gizzard, which becomes more muscular with age. Their general anatomy is consider- ably allied to that of the Calcatores, or Snipes and Plovers. Their toes A are shorter than in the preceding genera, and the feet better fitted for walking on land. Those of Britain are—the Great Black-backed Gull (ZL. marinus), white, with a black saddle; bill four inches long, and with the orbits yellow; of common occurrence: the Glaucous Gull (L. glaucus), with a very pale silvery saddle, and entirely white quills, from which we do not regard the Iceland Gull (L. islandi- cus, Auct.), of Europe, as distinct, having cbtained intermediate specimens of every grade of size; it is rare on the coasts of South Britain: the Herring Gull (L. argentatus), the commonest of all, differing from the first chiefly in its inferior size and ash-coloured mantle: the Lesser Blackbacked Gull (L. fuscus), somewhat less than the Herring Gull, and similar to the first, but not so deeply coloured, and having yellow legs instead of flesh-coloured, and red orbits; which is rather common: the Mew Gull (ZL. canus), a diminutive of the Herring Gull, with white legs: the Kittiwake Gull (Z. rissa), rather smaller still, and at once | distinguished by the total absence of hind-toe; both of these being common in particular localities: and the Ivory Gull (L. eburneus),the adult plumage of which is wholly pure white, contrasting with black feet, and which is only an occasional straggler in the British seas. All these are, for the most part, rock-builders. Fig. 123.—Sternum of Gull. Others, the Xema of Leach, have a black hood in summer, like the Terns, and are generally slighter-made, breeding chiefly in marshes: The commonest in Britain is known as the Hooded Gull (L. ridibundus), with the head and upper neck brownish-black during the breeding season, and bill and legs bright vermilion: the Masked Gull (L. capistratus) is rather smaller, with the hood considerably reduced, and is not common: L. atricilla is larger than either, with a stouter bill, and black legs; also very rare: L. Sabini, smaller than the Masked Gull, is at once distinguished by its forked tail, and is met with occasionally in Ireland and the west of Britain: and L. minutus, the smallest of all, not exceeding ten inches in length, and equally uncommon upon the British shores, is known by its size. There are many more, of both divisions. ] j On 258 AVES. From the Gulls have been very properly separated Tue Sxuas (Lestris, Iliger),— The membranous nostrils of which, larger than in the preceding, open nearer to the point and edge of the beak; the tail also is pointed, [and they have great cceca]. They eagerly pursue the smaller Gulls to rob them of their food, and, as has been said, to devour their excrement ; [the truth being, that they cause them to disgorge, whereupon they seize the food before it reaches the water, being endowed with uncommon power of flight]: hence their name, [Les¢ris, or robber. Four species occur on the British shores, successively smalier, with the middle tail-feathers prolonged in the same ratio. The largest (LZ. cataractes), nearly the size of the Great Black-backed Gull, has deep brown plumage, with the middle tail-feathers but slightly elongated. It breeds on certain of the northern Scottish isles, high upon the mountains, defending its nest with extraordinary spirit and intrepidity, and furiously driving off Eagles from the vicinity, for which reason it is protected by the inhabitants, as a guard to their flocks. The Pomarine Skua (ZL. pomarinus) is smaller, and though generally exceedingly rare, makes its apearance in certain seasons in considerable numbers, as in the instance of November, 1837. L. Richardsonii is the next in size, which is common about the northern Scottish isles; and L. parasiticus, the smallest, which belongs more properly to America, has exceedingly long middle tail-feathers. 'The females of these birds are larger than the males, which is the reverse of what is observable in the Gulls; and they lay but two eggs, of a dark colour]. Tue Terns (Sferna, Linn.) — Are termed Sea-swallows, from their extremely long and pointed wings, their forked tail, and short legs, which induce a port and flight analogous to those of the Swallows, [the true Terns, however, winnowing | more in the manner of the Gulls]. Their beak is straight, pointed, and compressed, without curvature or projection; having the nostrils near its base, oblong, and pierced quite through. The membranes which connect their toes are deeply emarginated, and they swim little, [if at allj. They fly in every direction and with great rapidity, uttering loud cries, and skilfully raising from the surface of the water mollusks and small fishes, upon which they feed, [and to obtain which they often plunge]. They also penetrate to the lakes and rivers of the interior. [Their anatomy precisely accords with that of the Gulls, as do also the character of their plumage, their seasonal and progressive changes, mode of propagation, eggs, &c. The British species fall into two principal groups; the majority having the same black calotte in spring as the Xema Gulls. The commonest (Sé. hirundo) has an ashy mantle, red feet, and the bill red with a black tip. The Arctic Tern (S¢. arctica), common along our northern coasts, is rather smaller, with shorter legs, and under- parts tinged with ash-colour. The Little Tern (St. minuta) is distinguished by its very inferior size, and white forehead. The Sandwich T. (S¢. canfiaca and Boysii) is larger than any of the foregoing, with black feet, and often a tint of roseate on the breast. In the Roseate T. (St. Dougalli), the same tinge is brighter, and the feet are orange. The Gull-billed T. (S¢. anglica) has the bill prominent at the symphisis, as in the Gulls; but not- withstanding its received systematic name, is extremely rare in Britain. The Caspian T. (S¢. caspia), occasionally met with in the Channel, is very considerably larger than any of the others. The two last are principally marsh Terns; and the most characteristic of these is the Black Tern (St. nigra), with tail less deeply forked than in the others, membranes of the feet more reduced, and smaller bill, which subsists chiefly on insects taken on the wing, and flies more like a Swallow. There are numerous others. } We might distinguish from the other Terns, Tue Noppres (Megalopterus, Boié),— The tail of which is not forked, [but the reverse,] and even with the wings ; and the bill has a slight salient angle, the first indication of that in the Gulls; [whilst the character of the plumage resem- bles that of a Petrel, and the feathers are not continued forward to the nostrils]. We only know of one,— The Black Noddy (Sterna stolida, Lin.).—Brown black, the front of the head whitish. It is well known to seamen for the stupidity with which it throws itself on vessels [and allows itself to be taken. Is one of the most widely distributed of birds ; and has occurred on the Irish coast. M. Audubon found its nests in yast numbers, placed upon bushes, in an island uninhabited by Man]. Tue Skimmers (Rhyncops, Linn.)— Resemble the Terns by their short feet, long wings, and forked tail; but are distinguished from all other birds by their extraordinary bill, the upper mandible of which is shorter than the other, both being flattened into simple [vertical] laminee, which meet without clasping. Their only mode of feeding is by skimming their aliment from the surface of the water with the lower mandible as they fly. a a PALMIPEDES. 259 The first known species (Rh. nigra, Lin.), is white, with a black calotte and mantle, a white streak over the eye, and the external tail-feathers white outside, bill and feet red. From the vicinity of the Antilles. There are four or five others. The third family, or that of the TOTIPALMATI, Is characterized by the thumb being united with the other toes by one single membrane ; though, notwithstanding this conformation, which renders their feet perfect oars, they are almost the only Palmipedes which perch on trees. All of them fly well, and have short legs. Linneus arranged them in three genera, the first of which requires to be subdivided. Tue Peticans (Pelicanus, Lin.)— Comprehend all those wherein some naked space is found at the base of the pill. Their nostrils are mere fissures, the aperture of which is scarcely [or not at all] perceptible. ‘The skin of the throat is more or less extensible, and the tongue extremely small. Their attenuated gizzard forms, with their other stomachs, a great sac, [which in several is furnished with an accessory pouch, analogous to that of the Crocodiles], and they have only middling or small cceca. [Their nostrils, which are always per- vious in the nestling, soon become entirely closed in the greater number of genera. The furcula is always anchylosed to the anterior portion of the sternal ridge. Their eggs are encased with a soft, absorbent, chalky substance, over the hard shell; and the young are at first covered with long and flocculent blackish down, remaining very long in the nest, and generally much exceeding the parents in weight when they leave it. None of them appear to moult before the second autumn. The greater number have bright green irides. | THE Pericans, properly so called (Pelicanus, Illiger ; Onocrotalus, Brisson),— Have the beak very remarkable for its inordinate length, its straight, very broad, and horizontally-flat- tened form, for the hook which terminates it, and finally for the lower mandible, the flexile rim of which supports a naked membrane, which is dilatable into a voluminous pouch. Two grooves extend throughout its length, in which the nostrils are concealed. The circumference of the eyes is naked, like the throat. The tail round. The common European Pelican (Pel. onocrotalus, Lin.).—As large as a Swan, and wholly white, slightly tinged with carneous, [and haying the breast deep buff-colour in old specimens]. The hook of the bill cherry-red. It is more or less plentifully diffused over the eastern world, nidificates in the marshes, and subsists entirely on live fish. Is reported to convey provisions and water in its pouch. Two or three others have been distinguished. Fig. 129.—Sternum of Cormorant. Tue Cormorants (Phalacrocorax, Briss.; Carbo, Mey.; Halieus, Il.)— Have the beak elongated, with the tip of the upper mandible hooked, and that of the other truncate. The tongue very small; and the skin of the throat less dilatable. The nostrils are like a little line, which does not seem to be pervious. The middle claw has a serrated inner edge. [Tail stiff and cuneated. It may be added, that the feet are placed backwards, in adaptation to diving habits, but are still tolerably free, these birds employing both the wings and feet in subaquatic progression. Their voracity is proverbial: and their intelligence surpasses that of most other birds, as does likewise their docility: hence they were formerly trained in Europe for fishing, as Hawks are for fowling, and they are still so employed in the East. The species are exceedingly numerous, and some are found almost everywhere. Two are very common on the British coasts. The Bronzed Cormorant (Pel. carbo, Lin.).—Size of a Gooze, and bronzed black, with fourteen tail-feathers. Both sexes develope, towards the breeding season, various accessory ornamental feathers about the head and neck, at which time the naked skin becomes brightly coloured, and a tuft of white feathers grows upon each si2 260 AVE flank. These ornaments fall in a few weeks, and are but imperfectly developed in younger individuals, and seldom except in a state of perfect liberty. In some parts of Europe, this species builds upon house-tops, and not unfrequently on trees: but on the British coast, they mostly resort to precipitous rocks or islets, generally in society. From their croaking voice, dark colour, and appearance on the wing, they are often termed Sea Crows. They can climb with considerable facility, aided by the beak and rigid tail-feathers. Occasionally they fly to inland waters and fish-preserves, where they are notoriously destructive, and are observed to evince a marked preference for Eels. The other species, or Crested Cormorant, (Phal. cristatus, Olass), is smaller, and less robust, with only twelve tail- feathers ; its glosses incline more to green, and the adults have an elegant recurved crest during the breeding season. ‘This bird is commoner towards the north, while the preceding is more numerous southward: neverthe- less, the Bronzed Cormorant appears to occur in both continents, whereas the Crested is represented in North America by a different one (PA. dilophus), both of these extending to high latitudes, though respectively peculiar to the Old and New World, so far as has vet been observed. A third European species is the Black Cormorant (Pel. graculus, Gm.); a diminutive of the first, but possessing only twelve tail-feathers, like the preceding, with which it has been confounded until very recently, by British naturalists. It inhabits to the southward of the British Isles, in which it has not hitherto been met with.! Tue TacuyPetes (Jachypetes, Vieillot)— Differ from the Cormorants by a forked tail, short feet, the membranes of which are very deeply notched, an excessive spread of wing, and a beak both mandibles of which are curved at the tip. Their wings are so powerful that they fly at an immense distance from all land, and principally between the tropics, darting upon the Flying-fish, and striking the Gannets to make them disgorge their prey. One only is known (Pel. aquilus, Lin.), the plumage of which is [richly empurpled] black, the under-part of the throat more or less varied with white, and the beak red. Its extent of wing is reported to be sometimes ten or even twelve feet. [This is the noted Frigate-bird, or Man-of-War-bird, of the English sailors, which is surpassed in command of wing by none of the class, if equalled by any. It breeds on trees on uninhabited islands, and lays a single spherical white egg. ] Tue Gannets (Sula, Brisson; Dysporus, Iliger)— Have a straight beak, slightly compressed and pointed, with the tip a little arcuated, and its edges serrated, the denticulations [which are more developed in the Cormorants] directed backwards: the [im- pervious} nostrils are prolonged in a line nearly to the tip: the throat is naked, as is also the skin of the eyes; the former but slightly extensible: inner edge of the middle claw serrated. The wings are less extended than in the Tachypetes, and the tail is a little cuneated. These birds are called Boobies, on account of the stupidity with which they [certain species of them] allow themselves to be attacked by men and birds, more particularly the Tachypetes, which, as already stated, force them to yield up the prey they have captured. The most common is the European Gannet (Pel. bassanus, Lin.).—White, with black feet and wing primaries, the bill greenish, and nearly equal in size to a Goose. [A common species in the British seas, which breeds in vast numbers upon the Bass rock in the Frith of Forth, and one or two other similar localities: the young are at first covered with the blackish down common to the group, in which they contrast remarkably with their white parents; their first plumage is dark above, beautifully speckled with white, these terminal specks gradually wearing off. The Gannets take their prey by plunging upon it from on high, and sail with an easy flight, with little motion of the wings. ‘Their air cavities are extraordinarily developed ; the ambient medium permeating all their bones with the exception of the phalanges of the toes, and passing under the skin of the breast, which is only attached to the muscles by a number of scattered connecting pillars; a structure which is also met with in the Phaetons. } Tue Anuineas (Plotus, Lin.)— With the body and feet nearly like those of a Cormorant, have a very long neck, and a slender, straight, and pointed bill, with denticulated edges; the eyes and nudity of the face as in the Pelicans, of which they have likewise the habits, nestling, like those birds, upon trees. [They may be described as Cor- morants, with the bill and neck of a Heron. Two or three species are found, in both continents ; the body inferior in size to that of a common Duck.] Tue Puaertons (Phaeton, Lin.)— Are known by their two very long and slender tail-feathers, which, at a distance, resemble a straw. Their head has no naked part. The beak is straight, pointed, denticulated, and moderately stout, [with pervious nostrils at all ages]: their feet are short, and their wings long. Accordingly, they fly very far from land, on the high seas ; and as they rarely quit the boundaries of the torrid zone, their appearance serves to indicate to mariners the vicinity of the tropic, [whence their common name of PALMIPEDES. 261 Tropic-birds]. On land, where they seldom resort except to breed, they perch upon trees. [They are closely related by affinity to the Gannets. | Several species are known, with white plumage, more or less varied with black, [and tinged in some with roseate, ] which do not exceed the size of a Pigeon. The family of LAMELLIROSTRES Is distinguished by a thick bill, invested with a soft skin rather than with true horn, [the fact being, that the corneous portion is restricted to the nail-like extremity, the rest corre- sponding to what is known as the cere]: its edges supplied either with laminz, or small teeth, [which are modifications of each other]: the tongue large and fleshy, with a dentelated border. Their wings are of moderate length. They live more in fresh waters than in the sea: and, in the greater number, the trachea of the male is dilated near its bifurcation into capsules of various form. Their gizzard is large, very muscular, and the cceca [generally | long. [These birds lay numerous spotless eggs, and the young follow their parent as soon as hatched. | The great genus of Tue Ducks (duas, Lin.)— Comprehends those Palmipedes which have a large and broad bill, the edges of which are beset with salient laminze placed transversely, and the purport of which appears to be for straining off the water when the bird has seized its prey. They divide into three subgenera, the limits of which, however, are not very precise. THE Swans (Cygnus, Meyer)— Have the bill of equal breadth throughout, and higher than wide at the base ; the nostrils placed about midway: and the neck exceedingly elongated, [possessing twenty-three vertebre*]. They are the largest birds of this genus, and feed chiefly on the seeds and roots of aquatic plants, [together with the grass which grows near the brink of water]. Their intestines, and cceca more especially, are accord- ingly very long. Their trachea has no inflation or labyrinth. (Swans are essentially modified Geese, and like the latter are exclusively vegetable feeders, with similar plumage in both sexes, which is moulted once only in the year, and undergoes no seasonal va- riation of colour. They attack with the same hissing note, strike similarly with their wings, and the male guards the female during incubation, and accompanies her while followed by her brood. They fall into two subdivisions. In the first, the trachea, after describing a slight curve towards the sternal ridge, proceeds to the lungs without entering any cavity in the bone. When swimming, they often erect the tertial plumes of the wing, in an elegant manner. Three of the four species have a fleshy caruncle over the base of the upper mandible, beneath which the bone is protuberant. The Mute Swan (Anas olor, Gmelin), or common domesticated species, the adults of which are wholly pure white, with a reddish bill, surmounted by a black protuberance, and leaden-black feet: young, grey, with the bill lead-coloured. The wild breed (C. immutabilis, Yarrell) is rather smaller, with the rostral protuberance less developed in the few specimens examined: there is also a semi-albino domestic race, with feet whitish, or par- tially so, and reported to have white cygnets, which is termed the Polish Swan by the dealers ; it varies in size, some attaining the largest dimensions of the ordinary tame breed. We are satisfied, from anatomical examina- tion, that these are all specifically the same. The wild race is rarely met with in Britain. These birds do not appear to breed before the third year. The Black Swan (A. atrata, Latham; A. plutonia, Shaw).—Less than the preceding, and not so elegant in its conformation, with its tertials curled upwards: colour black, with the exception of its white primaries, and the bill and naked skin at its base, which are red. It is common in New Holland, and propagates readily twice a year, or oftener, when brought to Europe. The Black-necked Swan (C. nigricollis)—White, with black neck and tips of the primaries; the sides of the head white, and bill and feet orange, the former haying a black protuberance. Common in South America. The smallest of all, or Duck-billed Swan (C. anatoides, King.), is also from South America, inhabiting towards the Straits of Magellan. Colour pure white, with black tips to the primaries, and bill and feet orange: the former having no basal protuberance. With the exception, therefore, of the common mute species, this division pertains to the southern hemisphere. The rest have the trachea elongated as in the Cranes, and similarly entering a cavity in the sternal * We have found this number in four species, viz., C. olor, atratus, musicus, and Bewichii,—Ep. 262 AVES. ridge. They carry the neck more upright, and never elevate the tertial plumes. None of them has any protuberance on the base of the bill; and they have all white plumage with black feet, or, in the young, grey plumage with white wings, and the feet white when newly hatched. They yield the swan’s down of commerce, which is much inferior both in quality and quan- tity in the others; and are restricted in their distribution to the northern hemisphere. Of four species, two are respectively peculiar to each continent. The Trumpeter Swan (C. buccinator) of America is the largest, and yields \\; most of the down of commerce, together with the next species. Its bill is wholly black, and the trachea forms a double vertical convolution within the sternal ridge, and is bifurcated into short inflated bronchi. Audubon’s Swan (C. Audubonii and americana) is smaller, but fully equals the European Hooper Swan in size, although it has been confounded with C. Bewickii. Its bill has au orange-yellow spot on each side towards the base, and the trachea forms a horizontal flexure within the inflated hind-margin of the sternum, having similar bronchi to those of the last. Bewick’s Swan (C. Bewichkii) is considerably smaller, with exactly similar tracheal apparatus, and a larger orange-yellow space at the base of the bill, extending to the nostrils. Of seventeen specimens dissected by us, one only presented the horizontal flexure of the trachea (represented from the identical specimen in fig. 130), though several were evidently older birds: but the inflated form of the bronchi constitutes an invariable distinc- tion from the next species. Tail-feathers generally twenty, sometimes eighteen, and we have more than once met with nineteen, where none had been lost. It is much less common in Britain, as a winter visitant, than the next. The Hooper Swan (C. musicus, Anas cygnus, Lin.), or common Wild Swan of Europe, which visits Britain in abundance in severe winters. The largest specimens are scarcely inferior in size to the Mute species, and have the most extended brilliant-yellow space at the base of the bill of any, extending beyond the nostrils. The trachea forms but a single vertical flexure, and the bronchi are much longer than in the others, and not inflated. On dissecting a cygnet in its down, we found the cavity of the sternal ridge completely formed, but the trachea did not enter. The tail-feathers are generally twenty, and sometimes twenty-one or twenty-two. All these birds utter loud trumpeting cries, and the present species has also a low musical note, which is often repeated. ] Fig. 130.—Sternum of Bewick’s Swan. We can scarcely distinguish from the Swans certain species, which undoubtedly are less elegant, but have the same beak. As The Knobbed Goose (Anas cygnoides, Lin.), which we rear in our poultry-yards, and which interbreeds readily with the common domestic species. The base of its upper mandible is protuberant, as in the Mute Swan, and its neck is whitish, with a dark streak passing down the back of it. [In every essential particular, this is a true Goose, and has sixteen cervical vertebra, like the rest of that genus. Its flesh is less highly esteemed than that of the common bird; than which, however, it is considerably more prolific, propagating at all seasons. As in the other Geese, it seeks its food principaily, or it may be said wholly, on land, and utters loud noisy cries.] The Spur-winged Goose (Anas Gambensis, Lin.).—Remarkable for its size, its elevated legs, the tubercle upon its forehead, and the two stout spurs with which the bend of its wing is armed. Its plumage is empurpled black, (very like that of a Musk Duck, to which this species is considerably allied, notwithstanding its long legs. It forms the genus Plectropterus of Swainson. The author also includes among the Swans the Canada Goose (A. canadensis), which also possesses every intrinsic character of the true Geese. It is a very Jarge species, with a long black neck, and white mark across the throat, as in the Black-necked Swan ; which is likewise readily domesticated, and breeds plentifully in Europe. Another nearly allied (4. Hutchinsonii) has more recently been discovered in the same country—North America, from which neither has been known to stray across the Atlantic in the wild state, though found very far to the north. The first down of all the Geese is mottled, of the Swans plain. ] Tue Geese (Anser, Brisson)— Have the bill moderate or short, narrower in front than behind, and higher than broad at the base ; the legs longer than in the Ducks, and placed nearer the middle of the body, to facilitate their gait on land. They have no labyrinth at the bottom of the trachea, nor does the latter form any curve in the known species. Several [all] feed on grass and grain. Tue Gerss, properly so called,— Have the bill as long as the head, with the ends of the lamelle extending to its edges, and appearing like pointed teeth. (The last-mentioned character is most strongly developed in the Snow Goose (A. hyperboreus) of North America, the adult male of which is white, with black primaries. This species rarely straggles into northern Europe. Four >. Long Tailed Duck L. Harle quin Duc k 2 ral Duck +. Summer Duck PALMIPEDES. 263 are more or less common in Britain during the winter, tne three first of which have been much confused. The colour of all is nearly that of a coloured domestic Goose. The Grey-lag Goose (A. cinereus), at once distinguished by the pale grey colour of its rump, which in all the others is dark blackish-brown. The bill also is larger and broader, with more strongly marked lamellz: the hue of it reddish flesh-colour, tinged with yellowish in summer, with always a white terminal nail to the upper mandible, except when very young; and the legs flesh-coloured. This, which is obviously the origin of the common tame Goose, is at present much the rarest in the British Isles, though it formerly bred abundantly in the fenny counties. The common statement that the male of the tame Goose invariably becomes white in the course of a few years, is untrue. The most nearly allied to it is the White-fronted Goose (A. albifrons), considerably smaller, with always a white forehead in the adult, and ordinarily more or less black on the under-parts, appearing in irregular patches; traces of which may likewise be sometimes found in the preceding species : its legs are orange-yellow, and bill flesh-coloured, with a white nail except when very young. This species is very common in winter, but has not hitherto been known to breed here. A still more abundant species is the Bean Goose (A. segetum), nearly as large as the first, with orange legs, and narrower bill, generally blackish, with an orange band across it, and a black nail: the latter is very rarely white in aged specimens, which often have the bill nearly wholly yellow, but never quite. The Bean Goose breeds sparingly in Sutherland, and some parts of Ireland. Lastly, the Pink-footed Goose (4. brachyrynchus, Baillon ; A. pheni- copus, Bartl.) is distinguished from the last by its inferior size, and pinkish-red legs, together with its shorter bill, the similar cross-band of which is permanently of a reddish-colour. It is not very common, though more so than the first, and combines the general form of the Bean Goose with the legs of the Grey-lag.] Tue BARNACLES— Are distinguished from ordinary Geese by a shorter and more slender bill, the edges of which conceal the extremities of the laminz, [though there is no drawing the line of separation, and the present division is generally rejected as superfluous. Two are common in Britain, and found on both sides of the Atlantic, each retiring very far north to breed, more particularly the second species. The Barnacle Goose (A. Jewcopsis); much smaller than any of the preceding, with a grey mantle, the feathers broadly edged with black, a black neck, and white visage: and the Brent Goose (A. bernicla), still less, and nearly all black above, with a white spot on each side of the middle of its neck. This bird is one of the finest for the table of the whole tribe. A third (A. swjicollis), common on the shores of the Caspian, and as far eastward as Lake Baikal, occurs as a rare occasional straggler, and has the smallest bill of any]. The Egyptian Goose, or Bargander, (dn. egyptiaca, Gm.), revered by the ancient Egyptians for the affection it evinces for its young, and remarkable for its display of colours, and for the small spur on the bend of its wing, also pertains to this subgenus: it is sometimes domesticated, but always retains a propensity to return to the wild state. [This species very properly constitutes the division Chenelopex, Swainson, and is a modifica- tion of the distinct Shieldrake group, all of which belong to the higher division of Geese, and not to the Ducks. There is a single inflated labyrinth at the bottom of its trachea, which, with its plumage, and the character of the down of the young, helps to intimate its real affinities*. | Tue Crreopsis (Cereopsis, Latham)— Is a New Holland bird, nearly related to the Barnacles, [so far as the beak alone would indicate,] but with a still smaller bill, the membrane of which is much broader, and extends a little upon the forehead. [This species seldom, if ever, enters the water, and has long legs, which are bare above the joint. ] We only know one, the Grey Cereopsis (C. cinereus, Latham), of a grey colour, with black spots, and as large as a tame Goose. [It breeds freely in this country, and possesses a tracheal labyrinth]. Tue Ducks, properly so called, (4nas, Meyer),— . Have the bill broader than high at its base, and wider at the end than towards the head; the nostrils also more approximated towards its back and base. The shortness and backward position of their legs render their gait upon land more difficult than in the Geese; and they have also a shorter neck, and their trachea is inflated at its bifureation into cartilaginous labyrinths, of which the left is generally the larger. [They subsist to a greater or less extent on animal diet, and the sexes are always different in colouring, the charge of the young being entirely left to the female, and the male approximating to the female colouring immediately after the breeding season. ] The species of the first division, or those in which the hind toe is bordered by a membrane, have a larger head, a shorter neck, the feet placed further backward, smaller wings, a more rigid tail, the tarsi more compressed, and the toes longer, with more complete webs. They walk with more difficulty, and live almost exclusively on animal food, diving very often. [The plumage is generally moulted once * The 4. Magellanica and antarctica, also, referred by the Author | figured by M. Eyton. The truth is, that these trivial modifications of to his division of Barnacles, likewise appertain to the Shieidrake the bill are of subordinate value, in the present extensive series. | --Kb. group, as shown by their anatomy: their tracheal labyrinths are a nS ee Ciesla eee Oe el anaemia 5 264 AVES. ouly in the year, the change of colour of the males, about midsummer, taking place without a renewal of the feathers.] Among them we may distinguish Tue Scorers (Oidemia, Fleming)— By the breadth and inflation of the bill. [Their plumage is chiefly deep black, and they are found almost exclusively in salt water, where they prey mostly on Testacea. Feet particularly large. Two species are not uncommon in the British seas—the Common or Black Scoter (Anas nigra, Lin.), entirely black, with an orange protuberance at the base of the bill, and orange-coloured legs; which is the most abundant, and has swollen bronchi; and the Velvet Scoter (4. fusca, Lin.), which is larger, with pink feet and black mem- branes, a white band on the wing, and spot of the same at each eye, its trachea having a sudden box-like enlarge- ment about the middle. A third, allied to the last, the Surf Scoter (4. perspiciliata, Lin.), occasionally strays from America, and is distinguished by the triangular patches of white on the crown and occiput: females of all dusky. The author adds certain species to this genus, with stiff and pointed tail-feathers, forming the Oxyura, Bonap. ; as the A. leucocephala, Pallas; and A. lobata, Shaw; which latter, a New Holland kind, is remarkable fora large fleshy appendage hanging under the bill. The A. rubida of Wilson is referable to the same natural division. ] Tue Garrots (Clangula, Leach)— Have a shorter bill, which is narrower in front: and at their head we place a species with the middle tail-feathers very long, which renders the tail pointed. [This bird, forming the division Harelda of Leach, is quite distinct from the others, and moults twice in the year.] The Long-tailed Hareld (An. glacialis, Lin.),—White, with a fulvous spot on the cheek and side of the neck, the breast, back, tail, and point of the wing, black: [scapularies broadly edged with rufous-brown in summer, con- siderably longer and pure white in winter, when they hang over the wing, as in the Eiders.] Its trachea, ossified towards the base, has on one side four square menibranous facets, above which it is inflated into a bony labyrinth. [A very active and noisy marine species, not rare off the coast of Scotland in winter, flying in small flocks. Further north, it becomes exceedingly numerous. } The Harlequin Garrot (An. histrionica, Lin.).—Ash-coloured, the male fantastically streaked with white; eye- brows and flanks rufous. [Also chiefly a marine species, not very closely allied to the remainder. The rest have a very large head, or which appears, rather, to be so from the fulness of the plumage, and are remarkable for their sexual disparity of size. They are chiefly found in fresh water, and prefer to breed in the hollows ot trees, as severally observed by Linneus, Hewitson, and Audubon. One is a common winter visitant in Britain]. The Golden-eyed Garrot (An. clangula, Lin.).—White, with a black head, back, and tail, a round white spot before each eye, and two white bands on the wing; female ashy, with rufous head: the middle of the trachea is very much enlarged, but preserves its flexibility, and it again becomes singularly widened towards its divarication. [The little Buffel-headed Garrot (An. albeola, Lin.), common in North America, is nearly allied]. Tue Erpers (Somateria, Leach)— Have a longer bill than the Garrots, ascending higher upon the forehead, where it is cut into by an angle of the feathers; but which is still narrower towards the tip. [These birds are more particularly allied to the Scoters, with which they accord in their exclusively marine habits and food. There are two species, both with long white scapularies, hanging laterally over the wing, and black and white plumage in the adult male. The Common Eider (An. mollissima, Lin.), with a singular green stain on each side of the neck ; and the King Eider (A. spectabilis), remarkable for a huge protuberance over the base of its upper mandible. Both yield the celebrated Eider down of commerce]. After these separations, there still remain Tue Pocuarps (Fuligula, Leach),— The beak of which is wide and flat, but offers no other marked distinguishing character. We possess several species, in all of which the trachea terminates by nearly similar labyrinths, forming a capsule to the left, in part membranous, supported by a framework and ramifications of bone. [Three are very common in Britain,—the Scaup Pochard (An. marila, Lin.), grey, with leaden-coloured bill, and green-black head and neck, which is chiefly found in salt water; the Red-headed Pochard (A. fevina, Lin.), ash- coloured, with rufous head and neck, and black breast, nearly allied to which, but larger, is the celebrated Ame- rican Canyass-back (A. valisneria, Wilson); and the Tufted Pochard (4. fudigula, Lin.; F. cristata, Auct.), purple-black, with pendent occipital crest, and white flanks and belly. A fourth, the White-eyed Pochard (A. nyroca, Gin.), is not common, and is distinguished by its maronne head and neck, the latter encircled with a black collar, and a white spot on the chin. A fifth, the Red-crested Pochard (A. rujina, Lin.), is larger than any of the foregoing (except the American), with elongated, bright ferrugineous, coronal feathers, and the rest mostly dark: this bird belongs properly to Asia, and is only known as a straggler so far west. Lastly, the Pied Pochard (An, Stelleri and dispar), with plumage not unlike that of an Eider, another native of eastern Asia, has likewise PALMIPEDES. 265 been killed here. Most of these birds are very fine eating, the Scaup least so, and feed (excepting that srecies) principally on vegetable diet. Their ceca are larger than in nearly all of the foregoing. ] The Ducks of our second division, wherein the back toe is not bordered by a membrane, have a more slender head, the feet less broad, the neck not so long, the bill more even, the body not so thick : they walk better, and feed on aquatic plants and seeds, as wellas on animal diet, [as indeed do also the preceding, though generally to a less extent]. It appears that their tracheal labyrinths con- sist of a homogeneous bony and cartilaginous substance, [which forms a simple vesicle. They all moult twice in the year, the males attaining, by actual change of feather about midsummer, a garb more or less similar to that of the females. They have a con- siderable dilatation of the cesophagus, and large cceca]. These likewise admit of some subdivisions, [though considerably less strongly marked than the foregoing]; and firstly, we may distinguish that of THe SHOVELLERS (Rhyncaspis, Leach) ,— The long beak of which is remarkable for its upper mandible forming a perfect half-cylinder, widened at the end. The lamallze are so long and delicate that they resemble ciliz. These birds feed on small worms, which they obtain from the mud at the edge of brooks, [and are merely true Ducks with the bill a little modified]. The Common Shoveller (An. clypeata, Lin.), is a very beautiful Duck, with green head and neck, white breast, rufous flanks, brown back, and wings varied with white, ash-grey, green, brown, &c., which visits us [principally] in the spring. Its flesh is excellent, and tracheal labyrinth small, [the intestines remarkably narrow and elongated]. It is the Chenerotes of Pliny. An Australian species (An. fasciata, Shaw), is remarkable for the edge of its beak being prolonged on each side into a hanging membranous flap. [The Shovellers grade into the ordinary Ducks by a succession of species, allied to the British Gargany Duck, which latter retains much of the same character of plumage and colouring. | Fig. 131.—Sternum of Teal. THE SHreLtpRAKEs (Zadorna, Leach)— Have the bill very much flattened towards the end, with a projecting boss at the base. [These birds are the most duck-like representatives of an extensive group, found chiefly in the southern hemisphere, and intermediate in their general characters to the present group of Ducks with unlobated hind-toe, and the Geese, but exhibiting none of the essential characters of the former. Like the Ducks, they have always a brilliant speculum of metallic colouring on the wing, and an inflated vesicle, in some single, towards the divarication of the bronchi: but they are exclusively vegetable feeders; the male guards the nest, and protects his brood, uttering with outstretched neck a hissing sound at any intruder; their plumage is moulted but once a year, and undergoes no seasonal change of colour, being generally alike in both sexes, or, when different, the male is white, as in certain Geese ; and lastly, they have a gait very different from that of the Ducks, all of them standing high upon the legs, and their young are at first pied, unlike those of other Lamellirostres. In all that we have examined, the intestines are particularly long and slender. Their subdivision is not easy ; and the common Shieldrake and Egyptian Goose, or Bargander, may be cited as characteristic examples: the wings of most are very similar. The Common Shieldrake (An. tadorna, Lin. ; T. vulpanser, Auct.).—White, with a green head and neck, a cin- namon-brown cincture round the breast, and black streak down the belly; the wing variegated with black, white, rufous, and green. Common on the shores of the North Sea and of the Baltic, where it nestles in the downs, generally in deserted Rabbit burrows, [and not rare on the British coasts, subsisting on fuci]. The trachea swells into two nearly similar osseous capsules at its divarication. {Another, of eastern Europe and Asia, the Ruddy Shieldrake (7. w¢i/a), has been known to stray westward as far as Britain. It has more the characters of a Goose, and chiefly inhabits the banks of large rivers. Wing like the common species, the rest of its plumage chestnut-rufous, whitish on the head and neck. ] Some Ducks of this second division have naked parts on the head, and often likewise a boss at the base of the beak; as, The Musk Duck (A. moschata, Lin.).—Originally from America, where it is still found wild, and is observed to perch upon trees ; it is now very common in our poultry-yards, where it is reared on account of its size. It readily hybridizes with the common species, [producing infertile hybrids]. Its capsule is very large, circular, vertically flattened, and on the right side only. [Its legs are very short, both sexes are alike in plumage, the male guards the nest and brood, and we consider it to be an extreme modification of the group of Shieldrakes.] 266 AVES. Some have the tail pointed. The Pintail Duck (A. acuéa).—[A common winter visitant in Britain, highly esteemed for the table; the male with a white mark down each side of the neck, meeting behind. It forms, with another, the needless division Dayjila of Leach.] In others, the middle tail-feathers are more or less curled upwards ; as, The Common or Mallard Duck (A. boschas, Lin.); known by its orange feet, greenish-yellow bill, the fine changeable green of its neck, separated from the dark maronne colour of its breast by a white ring, &c. In our poultry-yards, it varies like other domestic animals. The wild bird, common in our marshes, nestles among the rushes, in old trunks of willows, and sometimes upon trees. Its trachea terminates below with a great osseous capsule. Some of them have a crested head, and a bill rather narrower anteriorly, and which, though foreign, are now raised in all our aviaries. [They have smaller feet, perch readily on trees, and surpass all the rest of the tribe in the splendour of their colours. They constitute the Dendronessa, Swainson]. Such is the Mandarin Duck (A. galericulata) of China, and the Summer Duck (A. sponsa) of North America. Their capsules are rounded, and of moderate size. Other exotic species conjoin to the bill of the Ducks, legs which are even longer than those of the Geese: they perch and nestle upon trees. [These are the long-legged Whistling Ducks of the West Indies, which pertain to the major division of Shiel- drakes, and form the subgenus Dendrocygnus.] One of the number has even semipalmated toes. Lastly, among those which have no particular characteristic, the following visit our shores during the winter. The Gadwall Duck (4. strepera, Lin.), mostly of a lineated grey colour, with some rufous on the wings; the Widgeon (A. penelope, Lin.) ; grey, with a yinaceous breast, and rufous head and neck, the forehead and along the top of the head yellowish-white ; the Teal (4. crecca), with a rufous head, marked with green on each side, and a spotted breast; and the Gargany (A. querquerdula and circia), with a white stripe behind the eye. [In addition to these, two stragglers have been found in Britain, the Bimaculated Duck, (4. giocitans,) from Asia, allied to the Teal, but larger, with a brown head, having two large glossy green spots on each side; and the American Widgeon, with a Teal-like green stripe on the sides of the head (a trace of which is sometimes met with in the common Widgeon), no rufous on the head, a narrower bill, and smaller tracheal capsule. In all these the females have lineated brown plumage, which is characteristic of the true double-moulting Ducks with unlobated hind-toe, and the males are finely rayed across. The hubits of all are nearly similar to those of the common species. ] . The genus of Tue Mercansers (Mergus, Lin.) — con species, the bill of which, much more slender and cylindrical than in any of the foregoing, has each mandible armed throughout its length with small pointed teeth like those of a saw, directed backwards, [and which are merely modifica- tions of the ordinary lamellw]; the tip of the upper mandible is hooked. Their port and even their plumage are the same as in the Ducks, properly so called; but their gizzard is less muscular, and the intestines and ceca are shorter, [though less so than in the Scoters and Eiders. They have a lobated hind-toe, and the plumage is moulted in autumn only, the colours of the male undergoing an extraordinary amount of change towards mid- summer. They do not acquire their adult dress until the second general W; renewal of the feathers]. The labyrinth at the inferior larynx of the 4 males is enormous, and in part membranous [resembling that of the other Ducks with lobated hind-toe] ; and they live on lakes and ponds, where they are very destructive to fish, breeding in similar situations to the common Duck. (Of five species, four are met with in the British Isles, three of them commonly during the winter. All are beautiful birds, at least the males in breeding dress. They are—the Great Merganser (M. merganser and castor), as large as a Shieldrake, with green head and neck, and short bushy crest, the body white, more or less deeply suffused with saffron, with a blackish mantle, coral bill, and orange legs, —the male; and female rufous-brown, white beneath, with a slender and much longer crest ; which retires further north to breed: the Bay-breasted M. (MM. ser- rator), size of a Mallard, with a rufous brown breast, spotted with blackish, a green- black head and neck, surmounted with along thin crest, white ring round the neck, and elegant bordered shoulder-tufts ; female very like the last; which breeds on our northern lakes: and Fig. 132.—Sternum of Merganser. REPTILIA. 267 the Hooded M. (I. cucullatus), an American species, rare on this side of the Atlantic, the size of a Widgeon, with a very large fan-like crest, white bordered with black. These have two cceca of moderate length, and the trachea of the first presents two successive inflations in its course, which are about equal, the same expansions being also visible in the second species, wherein the higher is however increased, and the lower one diminished, in addition to the labyrinth at the inferior larynx. To this first group would seem also to belong the M. brazili- ensis, which is peculiar to South America. Finally, the Smew Merganser (MJ. aibellus) is very remarkable for possessing only one minute ccecum, resem- bling that of a Heron. It is an extremely beautiful bird, proper to the eastern Continent, and not rare in Britain during the winter, the male of which is bright glistening white, variegated with black markings, and the female like that of the others, except that the adult has a black patch before each eye. It retires far north to breed. The great division of web-footed birds might be naturally arranged imto five principal groups, continuatory with those indicated at the close of the series of Waders: viz.— XI. Natarores (Swimmers); includimg the Flamingo, but corresponding otherwise to the Lamellirostres of Cuvier. XII. Mercirores (Immergers); restricted to the two distinct families of Loons and Grebes. XIII. Piscatrores (Fishers); or the Totipalmati, which are all exclusively piscivorous. XIV. Vacarores (Wanderers) ; or the Longipennes; containing the two perfectly distinct groups of the Terns, Gulls, and Skuas, and of the Albatrosses and Petrels. XV. Urinatores (Divers); more properly so designated ; and composed of the separate families of Auks and Penguins. THE THIRD CLASS OF VERTEBRATED ANIMALS. REPTILIA. These have the heart so constructed that at each contraction a portion only of the blood received from the various parts of the system is sent into the lungs, the remainder of this fluid returning into the general circulation without having passed through the lungs, and consequently without having been subjected there to respiration. Hence, it results that the action of oxygen upon the biood is less than in the Mammalia, and that, if the amount of respiration of the latter, wherein the whole of the blood is obliged to pass through the lungs before returning into the system, be expressed as unity, the quantum of respiration of Reptiles should be expressed as a fraction of unity proportionately small, as the quantity of blood propelled into the lungs, at each contraction of the heart, is diminished. As respiration imparts the warmth to the blood, and the susceptibility of the fibre to nervous irritamen, Reptiles have cold blood, and their aggregate muscular energy is less than in the Mammalia, and much less than in Birds. Hence, their movements can scarcely be performed otherwise than by crawling or swimming: and though several of them leap and run with celerity on certain occasions, their habits are gene- rally sluggish, their digestion excessively slow, their sensations obtuse, and, in cold or temperate climates, they pass nearly the whole winter in a state of lethargy. Their proportionally very diminutive brain is less necessary than in the two preceding classes for the exercise of their animal and vital functions; their sensations seem to be less referrible to a common centre; they continue to live and to execute voluntary movements, for a very considerable while after having been deprived of the brain, and even when the head is severed. The connexion with the [main trunks of the] nervous system is also much less necessary for the contraction of the muscular fibre ; 268 VERTEBRATED ANIMALS and their flesh preserves its irritability much longer, after having been separated from the rest of the body, than is the case with the preceding classes. Their heart pulsates for many hours after it has been detached, and its loss does not deprive the body of mobility for a still longer period. It has been remarked of some which have the cerebellum extremely diminutive, that this circumstance has some reference to their disinclination to move. The smallness of the pulmonary vessels enables Reptiles to suspend their respiration without arresting the course of the blood, and thus to remain submerged with less difficulty, and for a longer time, than Mammalia or Birds. The cells of their lungs are not so numerous, as they contain fewer vessels within their precincts, and they are also much larger, these organs having sometimes the form of simple sacs, merely a little cellular. For the rest, Reptiles are provided with a trachea and larynx, although they have not all the power of emitting an audible voice. Their blood not being warm, they consequently do not require teguments capable of retaining heat; and they are accordingly covered with scales, or simply with a naked skin. The females have a double ovary and two oviducts, and the males of several genera have a forked or double penis, but in the last order (that of the Batrachians), they have [mostly] none at all. No Reptile incubates its eggs. In several genera of Batrachians, these are not fecundated until after they have been excluded; they have merely a membranous envelope. The young of this last order have, on quitting the egg, the form and gills of Fishes ; and certain genera retain these organs even after the developement of their lungs. In other Reptiles which produce eggs, the Snake, for example, the young is already formed and considerably advanced within the egg ut the time the parent deposits it; and there are even some species which may be rendered viviparous at will, by retarding the deposition of their eggs, as M. Geoffroy exemplified by depriving the common Snake of water. The amount of respiration in this class is not fixed, as in the Mammalia and Birds ; but it varies according to the relative proportion of the diameter of the pulmonary artery, as compared with that of the aorta. Thus, Tortoises and Lizards respire much more than Frogs, &c. [though the latter, it should be observed, respire in part over the whole damp skin, as conclusively ascertained by the experiments of Dr. Milne Edwards]. Hence, the differences of energy and sensibility are very much greater than those between one Mammalian and another, or one Bird and another. Reptiles also present more varied forms, characters, and modes of gait, than the two preceding classes; and it is in their production more especially, that Nature seems to have tried to imagine grotesque forms, and to have modified in every possible way the general plan adopted for all vertebrated animals, and for the oviparous classes in particular. A comparison of the extent of their respiration with their organs of movement has led M. Brongniart to divide them into four orders, which are as follow :— The Cuerontans (or Turtles and Tortoises), which have a heart with two auricles, and the body of which, supported by four limbs, is enveloped by two plates or buck- lers formed of the ribs and sternum. CHELONIA. 269 The Savrtans (or Lizards), which have a heart with two auricles, and the body of which, borne on four or two feet, is covered with scales. The Oruiprans (or Serpents), having a heart with two auricles, and the body of which is always deprived of feet. And The Barracurans, the heart of which has only one auricle; [Prof. Owen has shown that these also possess two] ; and which have a naked body, that in the greater number passes, with age, from the form of a Fish respiring by gills, to that of a Quadruped breathing by lungs. Some of them, however, never cast their gills; and there are certain species which have only two feet. Other authors, as Merrem, have made a different partition of the Saurians and Ophidians. They detach the Crocodiles to form an order [Loricata] by themselves, and place the rest of the Saurians with the first family of Ophidians (or that of the Orvets), which mode of distribution is founded on certain peculiarities of the organiza- tion of the Crocodiles, and upon a certain affinity of the Orvets for the Lizards. We have deemed it sufficient to indicate these affinities, which are nearly all internal, adopting, nevertheless, a division of more easy application. [In consequence, how- ever, of rejecting this obvious natural arrangement, the Ophidians and Saurians of our author grade into each other; whereas the more intrinsical characters remain inviolate, and indicate three natural groups of Loricata, Saurophidia, and Ophidia.] THE FIRST ORDER OF REPTILES,— CHELONIA,— Better known by the appellation of Tortoises [Testudinata], have a heart with two auricles, and a ventricle with two unequal chambers, which communicate together. The blood from the body enters the right auricle, and that from the lung the left; but the two streams mingle more or less in passing through the ventricle. These animals are distinguished, at the first glance, by the double buckler in which their body is inclosed, and which only allows the head and neck, the tail, and the four limbs, to be protruded. The upper buckler, termed the carapace or shield, is formed by the ribs, in number eight pairs, which are widened and joined together, and also to the plates adhering to the annular portion of the dorsal vertebra, by dentelated sutures, so that the whole is completely deprived of mobility. The inferior buckler, named the plastron or breast-plate, is formed of pieces which represent the sternum, and which are ordinarily nine in number. A frame-work composed of bony pieces, which are believed to have some analogy to the sternal or cartilaginous portion of ribs, and which in one subgenus even remains cartilaginous, surrounds the carapace, and unites all the ribs which compose it. The cervical and caudal vertebra are alone moveable. These two bony envelopes are immediately covered by the skin, or by scales; the scapula, and all the muscles of the arm and neck, mstead of being attached to the ribs and spine, as in other animals, are all underneath, as are also even the bones of the pelvis and all the muscles of the thigh; sothat, im this respect, a Tortoise may be regarded as an animal turned inside-out. The vertebral extremity of the blade-bone is articulated to the carapace; and its opposite extremity, which may be considered as analogous to a clavicle, is articulated to the breast- plate ; so that the two shoulders form a ring, through which pass the cesophagus and trachea. 270 REPTILIA. A third bony ramification, larger than the two others, and directed backwards and down- wards, represents, as in Birds, the coracoid apophysis ; but its extremity remains free. The lungs are much extended, and situate in the same cavity with the other viscera. The thorax being in the greater number immoveable, it is by the action of the mouth that the Tortoise breathes, by holding its jaws firmly closed, and alternately depressing and raising the hyoid bone: the first of these movements permits the air to enter by the nostrils; when, the tongue immediately closing their internal aperture, this second operation forces the air into the lungs. The same mechanism occurs in the Patrachians. Tortoises have no teeth; but their jaws are invested with horn like those of Birds, except in the Chelydes, in which they are merely covered with skin. Their ear-drum and palatal arches are fixed to the skull, and immoveable; their tongue is short, and beset with fleshy papille ; their stomach simple and strong; their intestines of mean length, and without a ccecum; and they have a very large fader The male has a simple penis of considerable size; and the female produces eggs covered with a hard shell. The male may often be recognized externally, by the concave form of the breast-plate. These animals are very retentive of life, and will continue to move for many weeks after having been deprived of the head. They require very little nourishment, and can pass whole months and even years without eating. Linnzeus united them all in the genus of Tue Torroises (Testudo, Lin.),— Which have been dividee into five subgenera, principally after the form and teguments of their carapaces and feet. Tur LANnpD-Tortotrsgs (Testudo, Brongniart)— Have a bulged carapace, sustained by a bony skeleton wholly solid, and anchylosed for the greater part to the lateral edges of the breast-plate; their legs are truncated, with very short toes connected almost to the nails, and are capable, together with the head, of being completely withdrawn into the armour; the fore-feet have five nails, and the hinder four, all thick and conical. Several species subsist on vegetabie matter. The Greek Tortoise (T. gr@ca, Lin.), is that which is commonest in Europe. It inhabits Greece, Italy, Sardinia, and (it would appear) al! round the Mediterranean ; is rarely a foot long; feeds on leaves, fruit, insects and worms ; and burrows a hole in which it passes the winter: it engenders in spring, and lays four or five eggs resembling those of Pigeons. Among the foreign species, there are several in the East Indies of enormous size, measuring three feet and upwards in length. One is more particularly known as the Indian Tortoise (7. indica, Vosm.), of a deep brown colour, with the carapace compressed in front, and its anterior border reverted above the head. Others are remarkable for the pleasing distribution of their colours, as the Geometrical T. (T. geometrica, Lin.), a small species with a black carapace, each scale of which is regularly adorned with yellow lines radiating from a disk of the same colour. A nearly similar but much larger kind (7. radiata) inhabits New Holland. Some species (the Pyaxis, Bell), have the anterior portion of the mouth moveable, as in the Terrapins ; and others (the Kinixys of the same naturalist) can move the hinder part of their carapace, but we have some reason to suspect that this latter conformation is merely accidental. Tue Emynes, or Freshwater Tortoises (Emys, Brongniart)— Have no other constant characters to distinguish them from the preceding, beyond the further sepa- ration of their toes, which are also terminated by longer nails, and the intervals between them are occupied by membranes, though they grade even in this particular. They also possess five nails hefore and four behind. The structure of their feet adapts them to more aquatic habits. The greater number live on insects, small fish, &c. ; and their envelope is generally flatter than in the Land-tortoises. That of Europe (7. europea, Schn.; T. orbicularis, Lin.), is the most widely diffused, and inhabits all the south and east of Europe as far as Prussia. It attains a length of ten inches, and its flesh is eaten, with a view to which it is fed upon bread and tender herbage; but it also subsists on insects, slugs, small fish, &c. Marsigni states that its eggs require a year to hatch. The Painted Emyde (T. picta, Scheff.) is one of the prettiest species, brown, with each scale encircled with a yellow riband, more wide in front. It is found in North America among the reeds, upon the rocks, or on the trunks of trees, from which it falls into the water on being approached. There are very many others. M. Fitzinger separates, under the name of Chelodina, and Mr. Bell under that of Hydraspis, those species which have an elongated neck, as Em. longicollis, Shaw, &c. Among the Fresh-water Tortoises may be noticed more particularly, CHELONIA. 271 Toe Terrapins, or Box-Tortoises, (Terrapene, Merrem; Kinosternon, Spix; Cistuda, Fleming),— The breast-plate of which is divided into two pieces by a moveable articulation, and which have the power of completely closing their carapace when the head and limbs are withdrawn into it. Some have only the anterior segment of the breast-plate moveable, as 7’. subnigra, Lin., and T. clausa, Scheff. ; while in others both segments are equally mobile, as T. tricarinata, Scheff., and T. pennsylvanica, Id. There are some Fresh-water Tortoises, Tue Cueryprons (Chelydra, Fitzinger ; Chelonura, Flemmg),— Which have a long tail and great limbs, that cannot be quite withdrawn within their armour. They approximate to some of the following genera, and more particularly to the Chelydes, and should rank as a particular subdivision. Such is the Long-tailed Tortoise (7. serpentina, Lin.), which is known by having its tail almost as long as the carapace, and beset with dentelated and pointed crests, and pyramidal scales. It inhabits the warm regions of North America, is very destructive to fish and water-fowl, ascends far up the rivers, and sometimes attains a weight of twenty pounds. Tue Turtes (Chelonia, Brongniart ; Caretta, Merrem)— Have their envelope too small to receive the head, and more especially the feet, which latter are extremely elongated, (particularly those in front,) flattened to serve as oars, and have all their toes closely united, and enveloped in the same membrane. The two first toes alone of each foot are furnished with pointed nails, and even these are apt to fall, one or the other of them, at a certain age. The pieces which compose their plastron do not form a continuous plate, but are variously dentelated, and leave great intervals, which are occupied only by cartilage. Their ribs are narrowed, and separate one from another at their external portion, but the entire circumference of the cara- pace is occupied by a circle of pieces corresponding to sternal ribs. The temporal fossa is covered over by an arch formed of the parietals and other bones, in such a manner that the whole head is guarded by a continuous bony casque. The esophagus is internally armed throughout with carti- laginous points, and sharp tubercles directed towards the stomach. The Edible or Green Turtle (7. midas, Lin.) is distinguished by its greenish scales, to the number of thirty, which do not cover each other in the manner of tiles, and the medial of which are ranged in almost regular hexa- gons. It attains a length of six or seven feet, and a weight of seven or eight hundred pounds. Its flesh supplies an agreeable viand, very wholesome to mariners traversing the torrid zone. It feeds in great troops upon the alge in the depths of the ocean, and approaches the mouths of rivers to respire. Its eggs, which are deposited in the sand where the sun may warm them, are very numerous, and fine eating; but its shell is not employed in manufactures. A neighbouring species (Ch. maculosa, Nobis,) has the middle plates twice as long as wide, and of a fulyous colour, marked with great black spots; and another (Ch. lachrymata, Nobis,) has plates as in the preceding one, but raised into a boss posteriorly, and black splashes upon the fulyous. The scales of both these are useful in manufactures. The Imbricated Turtle (7. imbricata), which is less than the green one, with a more lengthened muzzle and dentelated jaws,fand bearing thirteen yellowish and brown scales, which cover each other in the manner of tiles, furnishes the best tortoise-shell employed in the arts; but its flesh is disagreeable and unwholesome, though the eggs are very delicate. It inhabits the seas of hot climates. There are yet two species allied to the Imbricated Turtle, the Ch. virgata, Nobis, the scales of which are more raised, and the medial equal, but with more pointed lateral angles, and radiating black lines; and Ch. radiata, Scheeff., which merely differs from the last by having the hindmost of its middle scales wider, being perhaps a mere variety. Finally, the Hawk-billed Turtle (7. cavetta, Gm.) is more or less brown or rufous, with fifteen scales, the medial of which have raised crests, more particularly towards the extremity; the point of the upper mandible is crooked, and the fore-feet longer and narrower than in the others, preserving also better-marked nails. It inhabits Several seas, and even the Mediterranean, subsists on Testacea, has bad flesh, and shell which is in low estima- tion, but it furnishes an oil that burns well. Merrem has recently distinguished, as Tue Leatuersacks (Sphargis, Ill.; Coriudo, Fleming ; Dermochelis, Lesueur),— Those species which have no scales, but the carapace of which is invested with a sort of leather. Such is a large species of the Mediterranean [which has occurred two or three times on the British shores] (T. cor.acia, Lin.), the carapace of which is oval, and pointed behind, with three prominent longitudinal ridges. There is another in the Atlantic (Dermochelis atlantica, Lefevre]. Tue Cuetypes (Chelys, Dumeril ; Matamata, Merrem)— Resemble the Emydes by their feet and nails; but their envelope is much too small to inclose the 272 REPTILIA. head and feet, which are particularly large; their nose is prolonged into a little trunk; but the most strongly marked of their characters consists in having their widely-cleft mouth not armed with a horny beak, as in other Testudinata, but rather resembling that of certain Batrachians, which form the genus Pipa. The Matamata (7. fimbria, Gm.).—The carapace bristled with pyramidal eminences, and the body fringed all round with lamine, as if cut. An inhabitant of Guiana. Tue Sorr Tortorses (Trionyx, Geoff.)— Have no scales, but merely a soft skin enveloping both the carapace and plastron, neither of which is completely supported by bone, the ribs not reaching to the borders of the carapace, nor being united together for more than a portion of their length, the parts analogous to sternal ribs being replaced by a simple cartilage, and the sternal pieces being partly dentelated, as in the Turtles, and not covering the whole inferior surface. After death it is perceptible, through the dry skin, that the surface of the ribs is very jagged. The feet, as in the Emydes, are palmated without being lengthened, but only three of their toes are provided with nails. The horn of their beak is invested with fleshy lips outside, and their nose is prolonged into a small trunk. ‘The tail is short, and the orifice of the anus beneath its extremity. They inhabit fresh water, and the flexible borders of their envelope assist them in swimming. The Trionyx of the Nile (T. triunguis, Forsk and Gm.; T. egyptiacus, Geoff.) is sometimes three feet long, and of a green colour spotted with white; the carapace but slightly convex. It devours the young Crocodiles as soon as they are excluded, and thus renders more service to the Egyptians than even the Mangouste. The American Trionyx (7. ferov, Gm.) inhabits the rivers of Carolina, Georgia, Florida, and Guiana; and lies in ambuscade at the roots of the weeds, seizing on birds, reptiles, &c., and devouring the young Alligators, while itself becomes the prey of the larger ones. Its flesh is good eating. There are several more. THE SECOND ORDER OF REPTILES,— SAURIA,— Have the heart composed, as in the Chelonia, of two auricles, and a ventricle sometimes divided by imperfect partitions. Their ribs are moveable, attached partly to the sternum, and can rise and fall for the purpose of respiration. - Their lung extends more or less towards the hinder part of the body, often penetrates con- siderably forward below, and the transverse muscles of the abdomen slide under the ribs so far as to entwine the neck. Those in which the lungs are most developed exercise the singular faculty of changing the colours of their skin, according ‘as they are influenced by their wants or by their passions. Their eggs have an envelope more or less indurated ; and the young issue from them with the form which they retain ever afterwards. The mouth is always armed with teeth; their toes, with very few exceptions, are furnished with nails ; the skin is covered with scales more or less serrated, or at least with little scaly granules ; and they engender with either a singleor double male organ, according to the genus. All have a tail more or less lengthened, and in nearly every instance very thick at the base: the greater number have four limbs, though some have only two. Linnzus arranged them into only two genera, the Dragons and the Lizards; but the latter requires to be divided into several, which differ in the number of feet, of intromittent organs, in the form of the tongue, of the tail, and of the scales, so that we are obliged to separate them even into families. The first of these, or that of the CrocoDILEs, comprises but one genus,— THE Crocopites (Crocodilus, Brongniart),— Animals of Jarge size, which have the tail flattened at its sides, five toes on the fore-limbs, and four on Rattle Snake ih lle Crocodile I a a 1 SAURIA. X73 the hind, of which the three inward only of each foot are furnished with claws, all of them being more or less conaected by membrane; a single row of pointed teeth in each jaw; the tongue flat and fleshy, and attached very near to its edges, which led the ancients to believe that it was altogether wanting; the penis single; the anal orifice longitudinal; the back and tail covered with great square scales of exceeding strength, having an elevated ridge along their middle; and a deeply dentelated crest upon the tail, double at its base. The scales of the belly are also square, but smooth and narrow. The nostrils, opening at the tip of the muzzle by two small transverse fissures which close as valves, are continued by a long straight canal pierced in the palate bones and sphenoid, as far as the throat. The lower jaw is prolonged backward beyond the skull, which occasions the upper one to appear moveable, as the ancients asserted to be the case: the latter can only move, however, with the entire head. The external ear is closed at will by two fleshy lips; and the eye has three lids. Under the throat are two small holes, the orifices of glands, where a musky pommade is secreted. The vertebre of the neck are propped together by little false ribs, which render lateral movement difficult: hence these animals cannot readily change their course, and are easily avoided by turning. They are the only Saurians which have no clavicular bones; but their coracoid apophyses are attached to the sternum, as in all the others. Besides the ordinary true and false ribs, their abdomen is pro- tected by others, which do not ascend to the spine, and which appear to be produced by the ossifica- tion of the tendinous extremities of the straight muscles. Their lungs do not penetrate into the abdomen, as in other Reptiles; and the fleshy fibres adhering to the portion of peritoneum which invests the liver, impart the appearance of a diaphragm; cir- cumstances which, conjoined to the particular of their heart being divided into three chambers, wherein the blood that comes from the lungs does not mingle so completely with that of the body as in other Reptiles, ally these animals somewhat nearer to the warm-blooded quadrupeds. Their ear-drum and pterogoid apophyses are fixed to the skull, as in the Tortoises. Their eggs are hard, and the size of those of domestic Geese, whence the Crocodiles are reputed to be, of all animals, those which attain the greatest dimensions considering their size at birth. The females guard their eggs, and continue to protect the young for some months after exclusion. They inhabit fresh water, and are very carnivorous, but are unable to swallow under water; and their habit is to drown their prey, and then place it in some hole beneath the surface, where they leave it to putrefy before they devour it. They differ, indeed, so much from other Lizards, that several recent authors have deemed it neces- ‘sary to make of them a particular order, termed Loricata by Merrem and Fitzinger, and Emydosaura by De Blainville. The species, more numerous than has hitherto been supposed, fall into three distinct subgenera. Tue Gaviats, Cuv.,— Have the muzzle slender, and very much elongated; the teeth about equal; the hind-feet dentelated at their external edge, and webbed to the ends of the toes; two great perforations in the bones of the skull behind the eyes, which may be discerned outside the skin. They have only been observed on the eastern continent. That of the Ganges (Lac. gangetica, Gm.), which attains a large size, is remarkable, not only for thelength of its muzzle, but for a large cartilaginous prominence surrounding the nostrils, which throws these backwards, and led lian to assert that the Gangetic Crocodile had a horn at the tip of its snout. Tue CrocopiLss, properly so called,— Have the muzzle oblong and flattened, the teeth unequal, but resemble the Gayials in other respects. Some of this form occur on both continents. Tue Caymans, or Alligators (Alligator, Cuv.)— Have a broad and obtuse muzzle, and uneven teeth, the fourth below entering into cavities of the upper jaw, and not the interstices of the upper teeth, as in the preceding; their feet are only semi- palmated, and undentelated; and the species are only known to inhabit America. 274 REPTILIA. THE SECOND FAMILY OF THE SAURIANS,— Tue Lizarps,— Is distinguished by its slender, extensible, and forked tongue, as in the Snakes; by its lengthened body and rapid gait; the feet have each five toes furnished with claws, which are separate and unequal, more particularly those behind; their scales, under the belly and around the tail, are disposed in parallel transverse bands ; their tympanum, which is on the upper part of the head, is membranous and shallow; a production of the skin, split longitudinally, and which closes by a sphincter, protects the eye, beneath the front angle of which is a vestige of a third eyelid; their false ribs do not form a complete circle ; the males have a double penis ; and the anus is a transverse aperture. The species are very numerous and much varied, and we subdivide them into two great genera. Tue Monirors (recently termed, by a singular mistake, Tupinambis),— Are the largest of the whole tribe; they have teeth in both jaws, but none on the palate, and the greater number have the tail laterally compressed, in adaptation to aquatic habits. Frequenting the vicinity of the haunts of Crocodiles and Alligators, it is said that they give warning, by a whistling sound, of the approach of those dangerous reptiles, and hence, probably, their names of Sauvegarde and Monitor, though this is not quite certain. They divide into two distinct groups. The first, or that of Tur Monitors, properly so called,— Are known by their numerous small scales upon the head and limbs, the belly, and around the tail, which latter has a keel above, composed of a double range of projecting scales. Their thighs do not exhibit that range of pores found in most other Saurians. All are from the ancient continent. Two species, in Egypt, have been considered the types of separate subdivisions; the Nilotic M. (Lae. nilotica, Lin.), of Varanus, and the Ground M. (ZL. scineus, Merrem), of Psammosaurus, both of Fitzinger. Africa and India produce many more, with sharper teeth and still more compressed tail. The other group of Monitors has angular plates upon the head, and great rectangular scales upon the belly and around the tail. The skin of their throat is invested with small scales, and forms two trans- verse folds. They have a range of pores on the inside of each thigh. Two subdivisions are required. The first, or that of ° Tue Draconets (Crocodilurus, Spix; dda, Gray),— Is distinguished by caudal crests, like those of the Crocodiles, formed of raised scales; their tail is compressed. Such is The Great D. of Guiana (M. crocodilinus), Merr.), which attains a length of six feet, andis eaten. There are various others in the hot regions of America. Tue Resrrictep Monitors (Monitor, Fitzinger),— Have no keeled scales either on the back or tail; their teeth are denticulated, but with age the hind- most become rounded. Some, more particularly termed Sauvegardes, have the tail more or less compressed, and the belly scales longer than broad; they frequent the borders of water. One, in Braziland Guiana, attains to six feet in length. It runs swiftly on the ground, and takes to the water when pursued, into which it plunges, but does not swim ; it devours all sorts of insects, reptiles, the eggs of poultry, &c., and nestles in holes which it burrows in the sand. Its flesh and eggs are eaten. Others, termed Ameva, merely differ in having a round tail, covered, as is also the belly, with transverse ranges of keeled scales, which on the belly are broader than long. They are American animals, which resemble our Lizards extremely, but, besides wanting molar teeth, the greater number have no collar, and all have minute scales on the throat; their head, also, is more pyramidal than in the Lizards, and they have no bony plate over the orbit. Tue Lizarps, properly so called,— Form the second great genus of this tribe. They have the back portion of the palate armed with two ranges of teeth, and are otherwise distinguished from the preceding animals by a collar round the neck, which is formed by a transverse range of broad scales, separated from those of the belly by a space covered with small ones like those of the throat, and also by a part of the bones of the skull yo 2dvancing over the temples and orbits, so that the whole head is defended by a bony casque. Z The species are yery numerous, and many are found in Europe [though two only in this country, L. agilis, which is comparatively rare, and L. vivipara, which, unlike the other, is ovoviviperous, as in the Vipers, and extremely SAURIA 275 common upon heaths and sunny banks, One of a beautiful green colour, (L. viridis), is common over the south of Europe, and in the Channel Islands. ] The division Algyra, Cuy., has the dorsaland caudal scales carinated ; those of the belly imbricated and smooth» and no collar round the neck. Tachydromus, has square carinated scales upon the back, under the belly, and on the tail ; neither collar nor femoral pores ; but on each side of the anus is a small vesicle, opening by a pore. Their body and tail are very much elongated, and the tongue still longer than in the Lizards. 7 THE THIRD FAMILY OF THE SAURIANS,— THe Iguana Grovup,— Have the general form, long tail, and few and unequal toes of the last series ; the eye, ear, double penis, and anus, also similar; but their tongue is thick, fleshy, and non-extensible, and is notched only at the tip. They fall into two sections; the first having no palatal teeth, in which the following genera are arranged. Tue STELLions (Séellio, Cuv.)—- Which, with the general characters of this family, have the tail encircled with rings of large scales, that are often spinous. The subgenera are as follow. Cordylus, Gronoy., which have not only the tail, but the belly and back covered with large scales, transversely arranged. Their head, as in the common Lizards, is protected by a bony casque, and covered with plates. In several species, the points of the caudal scales form spinous circles ; there are, also, little spines on those of the sides, the back, shoulders, and outside of the thighs. The latter have a line of large pores. Stellio, Daud.—Caudal spines middle-sized ; the head posteriorly swollen by the muscles of the jaws; the back and thighs bristled with scales larger than the others, and sometimes spinous; little groups of spines encircling the ear; no femoral pores, and the tongue lengthened to a point. But one species is known, which inhabits the Levantine countries, where it is persecuted by the Mahometans, who conceive that it mocks their actions when praying. : Doryphorus, Cuy.—No femoral pores, as in the last, but the trunk not bristled with groups of spines. Uromastix, Cuy., have merely the head not swollen, and all the body-scales small, uniform, and smooth, but those of the tail are still larger and more spinous than in restricted Ste/lio, though there are none underneath it. A series of pores beneath the thigh. Tue AcamaAs (dgama, Daud.)— Have a great resemblance for the restricted Stellions, especially in the bulging of the head; but their imbricated and not verticillated caudal scales distinguish them. The maxillary teeth are nearly the same, and there are none on the palate. In The Ordinary Agamas, the scales, raised into points or tubercles, are alike bristled on various parts of the body, and especially round the ear, into spines that are sometimes grouped, and sometimes isolated. Occasionally, there is a range round the neck, but they never form the crest which characterises the Galeotes. The skin of the throat is lax, folded across, and susceptible of inflation. Some only have femoral pores. The Tapays are merely Agamas, which, with a swollen beliy, have a short and slender tail. Trapelus, Cuy., have all the scales small and spineless, and no femoral pores. That of Egypt changes colour as readily as the Chameleon. Leiolepis, Cuy., has the head less swollen, and is wholly covered with small and smooth serrated scales. It has femoral pores. Tropidolepis, Cuv., is uniformly covered with square, imbricated scales, and has the series of femoral pores strongly marked. Leposoma, Spix., differs only from the last in the absence of the pores. The Galeotes, (Calotes, Cuv.), are regularly covered with imbricated scales, often square and pointed, over the whole body, limbs, and tail, which last is very long ; those of the middle of the back being more or less raised and compressed into spines, forming a crest of varying length. Lophyrus, Dumeril, have a compressed tail, and dorsal crest still higher than in the last, from which they differ in possessing femoral pores. Gonocephalus, Kaup., have also a sort of disc on the skull, formed by a crest which terminates by a dente- lation before each eye. They likewise have a throat-appendage and nuchal crest. The tympanum is visible. Lyriocephalus, Merrem, conjoin to the characters of Lophyrus that of having the tympanum couched under the skin and muscles, as in the Chameleons. They have also a dorsal crest and keeled tail. Brachylophus, Cuv., have small scales, a nuchal and dorsal crest but slightly projecting, a small throat-appen- dage, femoral pores, and general aspect of the Iguanas; but no palatal teeth, and those of the jaws denticulated. Physignathus, Cuy.—The head bulged. backwards, without any throat-appendage, and a crest of great pointed scales along the back and tail, which last is much compressed. Tue [strures (Istiurus, Cuv.; Lophura, Gm.)— Are characterized by a raised and trenchant crest, which extends over a part of the tail, and is sus- The 276 REPTILIA. tained by long spinous vertebral apophyses ; this crest is scaly like the rest of the body ; the belly and caudal scales are small, and approach a little to a square form; the teeth are strong, compressed, and undenticulated, and are found only on the jaws; there are femoral pores, and the skin of the throat is lax, without forming an appendage. Tue Dragons (Draco, Lin.)— Are known at the first glance from all other Saurians, by their first six false ribs, instead of encircling the abdomen, being extended in a straight line, so as to support a production of the skin, which forms a sort of wing, and acts as a parachute when the animal leaps from bough to bough. They are small- sized reptiles, everywhere covered with minute imbricated scales, those of the tail and limbs being keeled. Their tongue is fleshy, but slightly notched and little extensible. Beneath the throat is a long pointed {inflatable} appendage, sustained by the hyoid bone, and laterally by two other small bones. The tail is long; the thighs have no pores; and there is a slight dentelation on the neck. Each jaw has four small incisors, flanked by a long and pointed canine, behind which are a dozen triangular and trilobate molars. They have, therefore, the scales and throat-appendage of the Iguanas, with the head and teeth of the Stellions. All the known species are from the East Indies. | Sitana, Cuv., differs in the non-prolongation of the ribs, and by having an enormous throat-appendage, which reaches to the middle of the belly, and is more than double the height of the animal. It is perhaps to this tribe of Agamas that we should approximate a most extraordinary fossil | reptile, the remains of which are imbedded in the Jura limestone,— | Tue Preropactry.us, Cuv. | It had a very short tail, a very long neck, and very large head; the jaws armed with even and pointed teeth ; but its principal character consisted in the excessive elongation of the second toe of its fore-feet,which extended twice the length of the trunk, and probably [undoubtedly] served to sustain some membrane by which the animal was enabled to fly, similar to that which the ribs of the Dragon support. The second section of the family of Iguanas, or that of the Iguanas proper, is distinguished from the preceding by the existence of palatal teeth. Tue Ieuanas, properly so called, (Iguana, Cuv.)— Have the body and tail covered with small imbricated scales; a range of spines along the back, or of raised, compressed, and pointed scales, and under the throat a compressed and pointed appendage, the edge of which is sustained by a cartilaginous production of the hyoid bone. The thighs have the same range of porous tubercles as in the Lizards proper, and their head is covered with plates; each jaw is surrounded by a range of triangular, compressed teeth, with denticulated edges; and there are also two little ranges at the back of the palate. A species common in all tropical America (Lac. iguana, Lin.), which grows to four or five feet in length, is esteemed very fine eating, though hurtful in syphilitic disorders. It lives chiefly upon trees, occasionally enters the water, and subsists on fruit, grain, and leaves. The female deposits eggs in the sand as large as those of a Pigeon, which are agreeable to the taste, and almost without white. Several others inhabit the same countries. Oruryessa, Boié. Small imbricated scales, a slightly projecting dorsal crest prolonged over the compressed tail, palatal teeth, and denticulated maxillary teeth which approximate it to the Iguanas, but no throat-appendage nor femoral pores. Tue Bastuisks (Basiliscus, Daud.) No femoral pores, but palatal teeth as in the last; the body covered with small scales; and a continuous elevated crest along the back and tail, which supports spinous vertebral apophyses as in the tail of Istiurus. Tue Marsters (Polychrus, Cuv.)— Have palatal teeth, and femoral pores, like the Iguanas, but which are inconspicuous: their body, however, clad with small scales, is not crested; the head is covered with plates; tail long and sharper- edged ; the throat extensile, forming an appendage at the will of the animal; and they change colour like the Chameleons, having a very voluminous lung, which fills nearly the whole body, and subdivides into numerous branches ; their false ribs also surround the abdomen, as in the Chameleons, and unite to form complete circles. SS ss NY SAURIA. Qi THE Ecpurimotes, Fitz. Teeth and pores of the preceding, but small scales on the body only ; those of the tail, which is thick, being large, pointed, and keeled; head plated; general form somewhat short and flattened, as in certain Agamis, rather than attenuated as in the Marblets. Op.urus, Cuv.,— Differs from the last in wanting femoral pores, with keeled and pointed caudal scales, which approximate this group to the Stellions ; the dorsal scales are also keeled and pointed, but very small. Tue Ano.is (Anolius, Cuy.)— To the general form of the Iguanas, and especially of the Marblets, conjoin a very peculiar distinctive character ; the skin of their toes widening under the antepenultimate phalanx into an oval disk, striated across underneath, so as to attach to different kinds of surfaces, over which they creep with much facility by means of their very crooked claws. The body and tail are uniformly roughened with minute scales, and the greater number have a goitre-like appendage under the throat, which inflates and changes colour with the passions of the animal, and during the season of copulation. Several of them at least equal the Chameleon in the facility with which they vary the colours of their skin. Their ribs unite beneath into complete circles, as in the Chameleons and the Marblets. Their teeth, as in the Iguanas and Marblets, are trenchant and denticulated, and they have the same range of them on the palate. The skin of the tail wrinkles into slight folds, each containing some circular ranges of scales. This genus appears to be peculiar to America. Some have a caudal crest sustained by spinous vertebral aphopyses, as in the Istiures and Basilisks ; while others have a round tail, or which is only 2 little compressed. It is to this family of Iguanians with palatal teeth, that the enormous fossil reptile of Maestricht ap- pertains, to which the term Mososaurus has been applied ; the Geosaurus of Soemmering, also, the Mega- losaurus of Buckland, and the /guanodon of Mantell, with certain others, all of immense size, appear to approximate this sanse family ; but their characters are not sufficiently known to class them with certainty. THE FOURTH FAMILY OF THE SAURIANS,— THE GECKOTIANS,— Consists of nocturnal species, so similar that they may be all left under a single generic head,— Tue Geckos, Daud. (Séellio, Schneider. ; Ascalabotes, Cuv.). These have not the attenuated form of the Lizards already treated of, but, on the contrary, are flat- tened; more particularly on the head, and have the feet of mean length, and the toes nearly equal; their gait is slow and stately ; their very large eyes, the pupil of which shrinks from the light, as in the Cats, indicate them to be nocturnal creatures, which pass the day in obscure places; their very short eyelids retreat altogether between the eye and orbit, which imparts a different physiognomy from that of other Saurians ; their fleshy tongue is not extensible; their tympanum a little deepened; their jaws are armed all round with one range of minute serrated teeth ; their palate toothless ; their skin is roughened above with ‘minute granular scales, among which are often some larger tubercles, and is covered on the under parts with somewhat less diminutive flat and imbricated scales. Some have femoral pores. The tail has circular folds, as in the Anolis; but, when it has been severed, it is reproduced without folds, and even without tubercles, which has led to a multiplication of the species. This genus is very numerous, and is diffused over the hot regions of both continents. Their tardy and sombre aspect imparts a certain resemblance to the Toads and Salamanders, and have hence caused them to be disliked, and accused of being venomous without any proof that they are so. The greater number have the tarsi widened throughout or in part, and marked underneath with very regular folds of the skin, which enable them to adhere to surfaces, so as to walk even on ceilings. Their claws are variously retractile, and preserve their sharp points ; which circumstance, in conjunction with their eyes, has led to their being compared to the Cats among mammiferous animals; these claws, however, vary in number according to the species, and in some are wanting altogether. The first and most numerous subdivision of the Geckos, which I name Platydactyles, have toes widened through- out their length with transverse scales underneath ; some have claws on all their toes, and very small thumbs. They are handsome animals, with bright colours, and are entirely covered with tubercles. The different known species inhabit the Mauritius. There are some with femoral pores, and others without, and among the latter rome with fewer or no claws. 273 REPTILIA. A second subdivision is formed of the Hemidactyles, which have an oval disk at the base of their toes, formed by a double range of chevron scales underneath; the middle of this disk elevates the second phalanx, which is slender, and bears the third, with its claw, at the extremity. The known species have all five claws, and the range of pores on either side of the anus; the scales underneath the tail form broad bands, as in the true Serpents. A third subdivision, which I style Thecadactyles, have toes widened throughout their length, and furnished with transverse scales underneath, but which latter are divided by a deep longitudinal groove, into which the claw retracts completely. Those known to me have the thumb alone clawless, no femoral pores, and the tail covered with little scales both above and below. The fourth subdivision of Geckos, I term Ptyodactyles. These have only the ends of their toes dilated into plates, with a fan-like structure beneath; the middle of the plate being split, and the claw placed in its fissure. They have very crooked claws on all their toes. Some have a round tail, and five toes; while others haye the tail bordered with a membrane on each side, and the toes palmated. It is probable that the latter are aquatic, and they are the Uroplates of Dumeril. A fifth subdivision is composed of the Spheriodactyles,—which are certain small Geckos, the ends of the toes of which are terminated by a little palette without folds, but the claws of which are always retractile. Those in which the palette is double, or emarginated in front, approximate the round-tailed Ptyodactyles. More frequently, how- ever, the palette is round and simple. All the known species are from India and the Cape. Finally, there are certain of these Saurians which, with all the other characters of the Geckos, have the toes not widened. Their claws, five in number, are nevertheless retractile. Some of these, with a round tail, and the toes striated beneath, having dentelated edges, constitute the Stenodactyles ;—and there are others with slender and naked toes, and also a round tail, which are the Gymnodactyles of Spix. Some, again, have the tail horizontally flattened, in the form of a leaf, which I denominate Phillurus. One species only is as yet known, from New Holland. THE FIFTH FAMILY OF THE SAURIANS,— THe CHaMELeEons (Cham@leo, Lin.),— Are so very distinct from the other Saurians that it is not easy to intercalate them in the series. All have the skin roughened with little scaly granules; the body compressed, and the dorsal line sharp; tail round and prehensile ; five toes on each foot, but divided into two opposite sets, one con- sisting of two toes, and the other of the remainder,—the toes of each of these sets being connected by skin as far as the nails; the tongue is fleshy, cylindrical, and extremely protrusile; the teeth trilo- bate; the eyes large, but almost covered by the skin, which leaves only a little aperture opposite the pupil, and they are moveable independently one of the other; the ear not visible externally, and the occiput pyramidically raised. Their first ribs are joined to the sternum, and the remainder are each continued to join the corresponding rib of the other side, encircling the abdomen by complete hoops. The lung is so vast that, when inflated, the body appears transparent, and induced the ancients to believe that these animals fed upon air. They subsist on insects, which they take with the glutinous extremity of the tongue, which organ is the only part of them that moves quickly. The motion of the limbs is excessively slow. The magnitude of the lung is probably the indirect cause of their changing colour, which does not take place, as is currently supposed, for the purpose of assimilating them to the proximate surfaces, but according to their wants and passions. Their lung, in fact, renders them more or less transparent, by forcing the blood more or less into the vessels of the skin, the colour even of this fluid being more or less vivid according as the lung is distended with air. They are constantly found upon trees. [These most singular animals are particularly remarkable for the diminished sympathy of the two sides of their whole frame, one of which may be asleep and the other awake, one of one colour and the other of another, &c.,— the separate movement of their eyes being merely another phase of the same phenomenon : hence it is remarkable, that, unlike most other animals, the Chameleon is totally unable to swim, from the incapability of its limbs of acting in due concert. } X THE SIXTH FAMILY OF THE SAURIANS,— THE SCINDOIDIENS,— Are recognized by the shortness of their feet, the non-extensibility of the tongue, and the equality of the tile-like scales which cover the whole body and tail. Tue Scinques (Scincus, Daud.)— Have four very short feet, a body of nearly the same calibre with the tail, no occipital bulge, no crest or throat appendage, and the scales uniform and shining, and disposed tile-fashion like those of a Carp. SAURIA. 279 Some have a spindle-shape; and others, which are nearly cylindrical, and more or less elongated, resemble Snakes, and more particularly the Orvets (dnguwis), with which they have many internal points of rela- tionship, and which thus grade from the family of Iguanas by an uninterrupted series of transitions. For the rest, the tongue of this genus is fleshy, and but slightly extensible and notched; and the jaws are armed all round with small serrated teeth. The remainder of their conformation approximates more or less to that of the Iguanas and Lizards, and all their toes are unguiculated and free. Certain species have palatal teeth, and a dentelated anterior border to the tympanum, while others (the 7iliqua, Gray) have no teeth to the palate. Tue Seps (Seps, Daud.)— Merely differ from the Scinques by having the body still more elongated, almost like that of an Orvet, and the feet still smaller, the fore and hind being also more separated from each other. Their lungs begin to exhibit some irregularity. Tue Diropes (Bipes, Lacep.)— Compose a small genus, which only differs from Seps by the total absence of anterior limbs, merely re- taining the scapulars and clavicles buried beneath the skin, and the hind feet alone being visible. There is but one step from them to the Orvets. Some have a range of pores on each side of the anus, which is not found in others. Tue CHatcripes (Chalcis, Daud.)— Are very elongated and snake-like Lizards, like the Seps; but their scales, instead of being disposed tile-fashion, are rectangular, and form transversal bands on the tail, like those of ordinary Lizards. Some have a groove along each side of the trunk, and the tympanum still very apparent. They approximate the Cordyles, as the Seps do to the Scinques, and lead, in a variety of ways, to the Pseudopodes and Ophisaurs. Others have a concealed tympanum, and conduct to the Chirotes, and thence to the Amphisbenes. Tue Currotes (Chirotes, Cuv.)— Resemble the last by their verticillated scales, and still more the Amphisbzenes, by the obtuse form of the head; but are distinguished from the former by the absence of hind feet, and from the latter by the existence of fore-feet. The only species (C. Zumbricoides) inhabits Mexico, and has all the internal organization of an Amphisbene, with femoral pores, and one great lung and the vestige of a second, as in most Ophidians. In fact, the genera which terminate this order of Saurians interpose in so many ways between the ordinary Saurians and the genera placed at the head of the Ophidians, that many recent naturalists object to separating the two orders, or at least establish one comprised of the Saurians in part, detaching the Crocodiles, and another of the Ophidians pertaining to the family of dAnguis; but among the fossils of the ancient limestone formations are found two very extraordinary extinct genera, which, with the head and trunk of a Saurian, have feet borne on short limbs, and composed of a multitude of little articulations, which form in the aggregate a sort of fin or swimming-paw, analogous to those of Ceta-. ceans. ‘The first of these genera, or that of Tue IcrHYOSAURUS,— Had a large head and short neck, enormous eyes, middle-sized tail, and elongated jaws armed with conical teeth, inserted in a groove. Several species are found in England, France, and Germany, some of immense size. The other genus, or THE PLESIOSAURUS,— Had a small head, and extremely long serpent-like neck, composed of more cervical vertebre than that of any other known animal. Its tail was short, and its remains are found in the same calcareous strata. These two genera, for a knowledge of which we are principally indebted to the researches of Messrs. Home, Conybeare, Buckland, &c., were inhabitants of the sea. They should form a very distinct family, but what is known of their osteology approaches more to that of the ordinary Saurians than the Croco- diles, with which latter they have been gratuitously associated by M. Fitzinger, since neither their tongue nor scales are known, which are the two most distinctive characteristics of the Loricata. [It has since been ascertained that they were covered merely with skin, apparently as in the Batrachians ; and there is reason to suspect that the Icthyosaur possessed a cartilaginous dorsal fin, as in many of the true Cefacea ] —_—_— Sr 280 REPTILIA. THE THIRD ORDER OF REPTILES. THE SERPENTS (Opuipra). These have no feet, and are consequently, of all others, the Reptiles which most merit the name. Their extremely elongated body progresses by means of folds pressed backwards against the ground. They divide into three families. THE FIRST FAMILY OF OPHIDIANS,— THE ORVETS— Retains the skull, teeth, and tongue of the preceding group of Seps, and the eye has three lids, &c. whence they are merely Seps without feet. Such are Tue Orvets (Anguis, Lin.),— Externally characterized by imbricated scales, which cover them all over. We subdivide them into four subgenera, the three first of which have a shoulder-bone and pelvis beneath the skin. The Pseudopodes (Pseudopus, Merrem) have the tympanum visible externally, and a small prominence on each side of the anus, which contains an ossicle analogous toa femur, articulated toa true pelvis beneath the skin; the anterior limbs are only represented by an inconspicuous depression, and have no internal humerus. One of the lungs is a fourth shorter than the other. The scales are square, thick, and semi-imbricated, and between those of the upper and lower parts is a groove of smaller scales on each side. The Ophisaurs (Ophisaurus, Daud.), merely differ in the absence of external rudiments of limbs, but retain the tympanum, and have one lung a third shorter than the other. The Orvets (Anguis, Cuvier), have no trace of limbs externally visible, and their tympanum even is couched beneath the skin; their maxillary teeth are crooked and compressed, and they have none on the palate. The body is surrounded with imbricated scales, without any lateral fold, as in the preceding ; and one of the lungs is shorter by half than the other. [A species, known as the Slow-worm, or Blind-worm, is of common occurrence in Britain, and throughout Europe. When alarmed, it constricts its muscles, and is then singularly brittle.] These three subgenera have still an imperfect pelvis, a small sternum, scapulars, and also clavicles, hidden beneath the skin ; and the absence of these several bones characterizes The Acontias (Acontia, Cuv.), which, in the structure of their head and eye-lids, still resemble the preceding ; their anterior ribs are connected all round, beneath the trunk, by cartilaginous prolongations; and they have one middle-sized lung, and another very short one. Their teeth are small and conical, and I think that I have per- ceived some on the palate. They are easily known by having the muzzle closed by a sort of mask. THE SECOND FAMILY OF OPHIDIANS,— THe TRUE SERPENTS,— Which is much more numerous, is composed of genera with neither sternum nor vestige of shoulder, but the ribs of which still encircle a great part of the trunk, and the vertebre are still articulated by a convex facet applied to a concave facet of the succeeding one. They have no third eyelid, nor tympanum ; but the small bone of the ear exists beneath the skin, and its handle passes behind the tympanic bone. Several have also, under the skin, a vestige of hind-limbs, which in some even shows itself externally in the form of a small hook. We subdivide them into two tribes. That of the Dovste-Marcuevurs [which progress either head or tail foremost,] have still the lower jaw fixed as in all the preceding Reptiles, by a tympanic bone, articulated direct to the cranium, the two rami of this jaw anchylosed at the symphysis, and those of the upper fixed to the skull, and to the intermaxillaries ; so that their swallow cannot dilate as in the following tribe, and their head is of even size with their whole body; a form which enables them to progress backwards or forwards with the same facility. The bony frame of the orbit is incomplete behind, and the eye is very small. Finally, their body is covered with scales, the anus very near its extremity, the trachea long, and the heart placed far backwards. None of them is known to be venomous. There are two genera, one of which approximates to the Chalcides and Bimanes, and the other to the Orvets and Acontias. Tue AMPHISBZNES (Amphisbena, Lin.)— Have the whole body surrounded with circular ranges of square scales, as in the Chalcides and Rimanes OPHIDIA. among the Saurians; a range of pores before the anus; the teeth few, conical, and growing only from the jaw, none from the palate ; and they have only one lung. There are three or four species, which live on insects, and are found principally about ant-hills, a circum- stance which has induced the opinion that they subsist chiefly upon Ants. They are oviparous. Tue Typeutors (7yphlops, Schneider)— Have the body covered with small imbricated scales, like the Orvets, with which they were long arranged ; the muzzle prolonged and plated ; the tongue rather long and forked; the eye reduced to a point, scarcely. visible through the skin; the anus nearly at the extremity of the body; and one lung four times as large as the other. They are small species, resembling Earth-worms at the first glance, and are found in the hot regions of both continents. Some have the head obtuse and even with the body, resembling packthread at both ends. Others have the muzzle depressed and obtuse, with scaly plates anteriorly. Some, again, have the fore-part of the muzzle covered with a single broad plate rather sharp in front. And there are others in which the muzzle terminates in a little conical point, being also totally blind: the posterior extremity of these is enveloped in a bony oval buckler, and they were formerly ranged with the Orvets, on account of their small scales. The other tribe, or that of the SeRPENrs properly so called, have a tympanic bone or pedicle to the lower jaw, which is moveable, and nearly always suspended by another bone analogous to the mastoid, which latter is attached to the skull by muscles and ligaments, that allow it also to be moveable. The branches of this jaw are not united together, and those of the upper are connected by ligaments only to the intermaxillaries ; so that they can open more or less, which imparts to these animals the capability of dilating the mouth, so as to swallow objects of greater bulk than themselves. Their palatal arches partake of this mobility, and are armed with recurved and pointed teeth, which is the most marked and constant character of this tribe; their windpipe is very long; the heart placed far backward ; and the greater number have only one great lung, with the vestige of a second. They divide into venomous and non-venomous, and the former of these into venomous having several maxillary teeth, and into venomous with isolated fangs. In the non-venomous, the branches of the upper jaw are furnished throughout their length, like those of the lower jaw and the palate, with fixed and solid teeth. There are three or four subequal ranges of these teeth in the upper part of the mouth, and two in the lower.* Those among them which have the mastoid bones inclosed within the cranium, the orbit incomplete behind, the tongue short and thick, and which resemble the Double-Marcheurs in the cylindrical form of their head and body, were formerly classed with the Orvets, on account of their diminutive scales. Tue Rotes (Tortrix, Oppel; Torguatrix, Gray; Ilysia, Hemp.),— Are externally distinguished from the Orvets by the range of scales along the belly and beneath the tail being rather larger than the others, as also by the extreme shortness of the tail. They have but one lung. All are from America. The Uropeltis, Cuy. (Anilius, Oken), is an allied new genus, the tail of which, still shorter and obliquely trun- cated above, is flat and beset with little scales at the truncation. Their head is very small; the muzzle pointed ; they have arange of scales under the tail, a little larger than the rest, and a double range beneath its truncate portion. The non-venomous Serpents which, on the contrary, have detached mastoid bones, and the jaws or which are dilatable, have the occiput more or less bulged, and the tongue forked and very extensible. Two principal genera have long been distinguished,—the Boas and the Snakes proper. Tue Boas (Boa, Lin.),— Formerly comprehended all Serpents, venomous or not so, the under-part of the body and tail of which is covered with scaly transverse bands, each of a single piece, and which have neither spur nor rattle at the tip of the tail. Being very numerous, it is necessary to subdivide them, after abstracting the venomous ones. * The common opinion is, that all Serpents destitute of pierced , hack-molars of which are very large, are reputed to be ex*remely fangs in the lower part of the jaw, are non-venomous; but this | have | venomous in the countries which they inhabit; an opinion which is confirmed by the experiments of Lalande and Leschenauld, which it is desirable should be repeated. some reason to doubt. All have a maxillary gland, often very large ; and the back-molars frequently exhibit a groove, which would seem to conduct seme liquor. This much is certain, that various species, the 282 REPTILIA. The Boas more particularly so named, have a hook on each side of the anus; a compressed body, larger towards the middle ; a prehensile tail; and small scales, at least on the hinder part of the head. Among them are found the largest of all Serpents, certain species attaining a length of thirty or forty feet, and being capable of swallowing Dogs, Stags, and even Cattle, at least according to some narra- tors, after having crushed them within their folds, lubricated them with their saliva, and enormously dilated their jaws and gullet. This operation lasts a long while. A remarkable particular of their anatomy consists in their having one lung but half shorter than the other. [At the extremity of the great lung in all this tribe is an extremely capacious air-bag, the use of which appears to be for con- taining the air requisite for respiration, when the nostrils are closed by the tedious process of degluti- tion.] We subdivide these Serpents according to the teguments of the head and jaws. Some have the head covered as far as the tip of the muzzle with small scales resembling those of the body, and the plates which invest the jaws are not furrowed with grooves. Others have scaly plates beneath the eyes as far as the muzzle, and no furrows to the jaws. Some, again, have scaly plates upon the muzzle, and grooves upon those of the sides of the jaws. There are some with plates on the muzzle, and the sides of the jaw hollowed into a slit-like chink beneath the eye and further backward. And, lastly, some have no furrows, and the muzzle invested with plates but slightly prominent, which are obliquely cut backwards in front and truncated at the tip, so as to terminate in corners: these have the body much compressed, and the back keeled. They inhabit the East Indies whereas the others are from America, and should form a distinct subgenus—Cenchris, Gray. Tue Scyrats (Pseudoboa, Schneider). Plates, not only on the muzzle, but over the cranium, as in the Snakes proper; no grooves, the body round, and head even with the trunk, as in the Roles. Daudin has likewise separated Tue Eryx,— Which differ by having a very short obtuse tail, and by their ventral plates being narrower. The head is short and nearly even with the body, characters in which they approximate the Roles, were it not that the conformation of their jaws permitted these to distend. The head is covered with small scales; and they kave also no hooks near the anus. Tuer Erpetons, Lacepede,— Are very remarkable for having two soft prominences covered with scales, at the tip of the muzzle ; head plated; the plates of the belly not very wide, and those of the under-part of the tail different from the other scales. Their tail, however, is long and pointed. Tue Snakes Proper (Coluber, Lin.) — Comprehended all the species, venomous or non-venomous, the plates underneath the tail of which are divided each into two, or, in other words, ranged in pairs. Independently of the subtraction of the venomous kinds, their number is so vast that we are obliged to have recourse to all sorts of characters in order to distinguish them. First, are separated Tue Pytuons, Daudin,— Which have hooks near the anus, and narrow ventral plates, as in the Boas, from which they only differ by having the plates underneath the tail double. Their head is plated at the tip of the muzzle, and their lips grooved. Species occur as large as any Boa. Some of these Pythons have the first, and others the terminal plates of their tail, simple ; but these are perhaps accidental varieties. The Cerberi, like the true Pythons, have the head entirely covered with small scales, with the exception of plates between and before the eyes ; but they have no hooks near the anus. They bave sometimes also simple plates at the base of the tail. Xenopeltis, Reinwardt; have great imbricated triangwar plates before the eyes, which might be confounded with the scales adjacent to them, only that the latter are smaller. Heterodon, Beauvois.—The ordinary plates of this group, but the tip of the muzzle composed of a short single piece, in form a trihedral pyramid, which is a little raised and erected above, a conformation which has induced the appellation of pig-snouted Serpents. The Hurria, Daud.—Indian species, with subcaudal plates always simple, except those at the point, which are double ; these trivial anomalies, however, merit but little notice. The Dipsas of Laurenti (Bungarus, Oppel.)—Body compressed, and very much larger than the head: the range of scales along the spine of the back larger than the others. Dendrophis, Fitzinger ; Ahetulla, Gray.—Resemble the last by having a range of broader scales along the back, and narrower scales along the flanks; but their head is not wider than the body, which is slender and very much lengthened. Muzzle obtuse. OPHIDIA. 283 Dryinus, Merrem ; Passerita, Gray.—Body as long and slender as in the last, but a small and slender pointed appendage at the tip of the muzzle. Dryophis, Fitzinger.—The same long filiform or cord-like body, but no appendage, and the scales of equal size. Oligodon, Boié. Small species, with an obtuse, short, and narrow head, and no palatai teeth. After all these dismemberments by different authors, there yet remain several which appear to me less worthy of adoption ; being founded on slight differences in the proportions of the head, the thickness of the trunk, &c, : and there is still left a group the most numerous of all in species, that of The Snakes, as most restricted, which have no peculiar distinguishing character. Several of these are found in France, [and one only in Britain, the common Ring-necked Snake (C. natrix and Natrix torquatus), which attains to a yard in length, and feeds on Frogs, Mice, insects, &c.] It is eaten in some provinces of France. 'The exotic species are innumerable: some are remarkable for the splendour of their colours; others for the regularity of the distribution of them ; many are quite uniform in their tints ; and a few only attain a very large size. Tue Acrocuorpvus, Hornstedt— Are readily distinguished from the rest of this family by the uniformly small scales with which their body is covered both above and below. The known species (A. javensis, Lac.; Anguis granulatus, Schneider,) has each of its scales raised into three little crests, resembling, when the skin is very loose, three isolated tubercles. It grows to a large size. Hornstedt has stated that it subsists altogether on fruits, which in an animal of this kind would be very extraordinary. The Venomous Serpents par excellence, that have isolated fangs, present a peculiar structure of the organs of manducation. Their superior maxillary bones are very small, borne upon a long pedicle, analogous to the outer pterygoid apophysis of the sphenoid, and are also very moveable; having a pointed tooth affixed to them, which is pierced by a small canal, through which issues a liquid secreted by a large gland beneath the eye. This liquid it is, instilled into the wound inflicted by the tooth, which poisons the bodies of animals, and produces effects more or less deadly, according to the species from which it is derived. The tooth lies down flat in a fold of the gum when the Serpent has no occasion for it, and behind it are several germs designed successively to replace it, in case it should be left in a wound. Naturalists have termed these venomous teeth crochets mobiles [or fangs], but it is properly the maxillary bone that moves. These Serpents have no other teeth besides the double range upon the palate. All the venomous species of which we possess certain information, bring forth their young alive, the eggs hatching within the body of the parent, [though during the act of parturition]. It is thus that their general name of Vipers has arisen, which is a contraction of viviparous. Venomous Serpents with isolated fangs, present nearly the same external characters as the pre- ceding; but the greater number have extremely dilatable jaws, and the tongue very extensile. Their head, which is wide posteriorly, has in general a savage aspect, which to a certain extent announces their ferocity. They form two principal great genera, the Rattle-snakes and the Vipers, of which the second has many subdivisions, around which some alien small ones require to be grouped. ; Tue RaTTuLrE-sNnakEs (Crotalus, Lin.)\— Are more celebrated than any other Serpents for the deadliness of their venom. In common with the Boa, they have simple transverse plates beneath the body and tail, but are most obviously distinguished by the rattling instrument which they carry at the tip of the tail, and which is formed of several scaly cornets loosely attached together, that move and rattle whenever the animal shakes or alters the position of its tail. It appears that the number of these cornets increases with age, and that they acquire an additional one at each casting of the skin. Their muzzle is hollowed by a little rounded depression behind each nostril. All the known species are from America. They are so much the more dan- gerous, as the season or climate is hotter; but their ordinary habits are tranquil and sluggish. They move slowly, and only bite when provoked, or for the purpose of killing their prey. Although they do not climb trees, they nevertheless feed principally upon Birds, Squirrels, &c., which it was long be- lieved they possessed the faculty of hallucinating or charming, so as to draw them by degrees to enter their throat. It would seem, however, that the fear which their appearance inspires occasions those disordered movements of their prey, which have given rise to the foregoing supposition. Most of the species have the head scaled similarly to the back; while others have great plates upon the head. We approximate The Trigonocephali of Oppel (Bothrops, Spix ; Cophias, Merrem); which are distinguished ‘by the absence of the rattle, but accord in their other characters. Some of these have simple subcaudal plates, as in the preceding, 284 REPTILIA. and the head plated to the eyes; the tail terminated by a spur. Others have no subcaudal plates, and the head scaled like the back. Some have the head plated, with double subcaudal plates: and others conjoin to the latter character, excepting that the extremity of the tail has small scales both above and below, little scales upon the head also. Tue Vieers (Vipera, Daud.),— The greater number of which were confounded by Linnzus with the Snakes proper, on account of their double subcaudal plates, require to be separated from the latter by reason of their venomous fangs, and grade into other Serpents with single or partly double subcaudal plates, being distinguished from the Rattlesnakes and Trigonocephalets by the absence of cavities beneath their nostrils. Some have only keeled and imbricated scales upon the head, like those of the back ; and others have the head covered with small granulated scales, [among which is the Viper or Adder of this country]. Some again [the Ce- rastes| have a pointed bone over each eyebrow, [and are peculiar to Africa]. Others, which are similar in ali other respects to the preceding generally, have three plates a little larger than the scales which surround them upon the middle of the head. There are some Vipers, also, with plates upon the head, like those of the Common Snake. Naia—Are Vipers with plated heads, the anterior ribs of which can be dilated and thrown forward, so as to distend this part of the trunk into a disc more or less broad. The most celebrated species is the Cobra di Capella of India, with a spectacle-like mark on the disk, and which is extremely venomous. The Haje, or Asp, of Egypt, is another. Elaps.—Head plated, and an opposite organization of the body to the Asps; their jaws even can scarcely widen, on account of the shortness of the tympanic bones, and especially of the mastoids, from which it results that the head is nearly of even size with the body, as in the Roles and Amphisbanes. Micrurus, Wagner, has merely the tail shorter. Platurus, Latreille—Head also plated, and double plates beneath the tail; but the latter compressed like an oar, which renders them aquatic. Finally, we place at the termination of the Vipers certain species which only differ in having single subcaudal plates, either partly or throughout. They are distinguished from the Tisiphones by having no cavities behind the nostrils. Some, with entire plates at the base of the tail, compose the Trimererurus, Lacepede, having large plates on the head, and some of the subcaudal ones double, others single. Oplocephalus, Cuy.—Have great plates on the head, and all the subcaudals single. Acanthophis, Daud.; Ophrias, Merrem.—Plates in front of the skull and of the head, the tail terminated by a hook, and all its plates simple, though sometimes there are double ones at its extremity. Echis, Merrem.—Small plates on the head, and all the subcaudals single. Langaha, Bruguitres.—Head plated ; the muzzle pointed and projecting; anterior half of the tail encircled with entire rings, and the posterior with little imbricated scales both above and below. Besides these two tribes of Serpents properly so called, which have been longer known, a third has been discovered more recently, the jaws of which are organized and armed nearly as in the non- venomous kinds, but which have, nevertheless, the first of their maxillary teeth longer than the rest, and pierced for the purpose of conducting venom, as in the genera with isolated fangs, already described. These Serpents form two genera, distinguished from those of the two allied families, by the scaling of the belly and under-part of the tail. Tue Bonears (Pseudoboa, Oppel.) — Possess, like the Boas, the Rattlesnakes, and the Scytals, simple plates beneath the belly and tail. Their head is short, covered with large plates, and the occiput but slightly bulged. Their most charac- teristic distinction, however, consists in their very carinated back being furnished with a longitudinal range of scales, broader than the lateral ones, as in the Dipsas. They inhabit the Fast Indies, where they are called Rock Snakes, one of the species attaining a length of seven or eight feet. Tue Hypras (Hydrus, Schneider, in part ; Hydrophis and Pelamides, Daud.)— Have the back part of the body and tail very much compressed and raised vertically, which, imparting to them the power of swimming, renders them aquatic animals. They are very common in certain parts of the Indian Seas, [and excessively venomous, feeding on fishes]. Linnaeus ranged those that were known to him among the Orvets, on account of the small scales with which they are wholly covered. Daudin has subdivided them as follows :— Hydrophis.—These have a range of scales a little broader than the rest under the belly, as in the Erpetons and Roles ; the head small, not bulged, obtuse, and covered with large plates. Several species are found in the salt water of Bengal, and others in the Indian ocean. Pelamides,—have, also, great plates on the head, but their occiput is bulged on account of the length of the BATRACHITA. 285 pedicles of their lower jaw, which is extremely dilatable ; all their body-scales are equal, of small size, and disposed hexagonally. To these subgenera I have addea that of Chersydrus,—the head and body of which are equally covered with small scales. THE THIRD FAMILY OF OPHIDIANS,— Tue NAKED SERPENTS,— Comprises but one very singular genus, which several naturalists have deemed to belong rather to the Batrachians, although we are not aware that it undergoes any metamorphosis. It is that of Tue Cecrirans (Cecilia, Lin.),— So named on account of their excessively minute eyes, which are nearly hidden by the skin, and are sometimes absent altogether. The skin is smooth, viscous, and annularly wrinkled, appearing naked, although, upon dissection, some perfect though minute scales are discernible, which are regularly disposed in several transverse ranges between the wrinkles of the skin, and which we have detected, with certainty, in more than two species. The head is flattened, the anus round and nearly at the extremity of the body, the ribs much too short to encircle the trunk, the articulations of the vertebre together are by conically hollow facets filled up with gelatinous cartilage, the same as in the Fishes and some of the lower Batrachians, and, in a slight degree, in the Amphisbznes only, among the other Ophidians ; their maxillary bones cover the orbits, which are pierced by only a very small foramen, and the temporal bones extend over the fossa, so that the skull presents a continuous beny buckler above; their hyoid bone, composed of three pairs of arcs, induces the supposition that it originally supported gills. The maxillary and palate teeth are arranged in two concentric lines, the same as in the Proteans, but are often sharp and curved backward, as in the Snakes properly so called; the nostrils open behind the palate, and the lower jaw has no moveable pedicle, the tympanic bone being encased, together with the other bones, in the buckler formed by the skull. The auricle of the heart of these animals is not divided so deeply as to be considered double, but their second lung is as small as in the other Serpents; the liver is divided into a great number of transverse lamin. In their intestines have been found vegetable matter, together with soil and sand. Their ear has merely a small plate upon the oral orifice, the same as in the Salamanders. Some of them have an obtuse muzzle, lax skin, very deep wrinkles, and two small cili# near the nostrils; as C. annulata of Brazil, which is found in marshy places several feet under ground, C. glutinosa of Ceylon, &c.; while others have the folds of the skin nearly obsolete, a very long slender body, and projecting muzzle. One of these is totally blind, the C. dumbricoides, Daudin; it is of a blackish colour, two feet long, and no thicker than a goose-quill. THE FOURTH ORDER OF REPTILES,— THE BATRACHIANS,— Have but one auricle and one ventricle to the heart, [an assertion disproved by Professor Owen]. Their two lungs are always equal, and when young they conjoin to these, gills, which give them a relationship with the class of Fishes, and which are borne on the sides of the neck, upon the cartilaginous arches which support the hyoid bone. The greater number lose these gills, together with the supporting apparatus of them, upon attaining the perfect state: three genera only, the Syrens, Protei, and Menobranchi, retaining them at all ages. During the period of the retention of the gills, the aorta, on proceeding from the heart, divides into a number of branches upon each side, corresponding to that of the gills; the blood from the gills returning through veins which unite together towards the back, into a single arterial trunk, as in Fishes: this trunk, or the veins which form it more directly, supplies the greater number of arteries which nourish the body, and even the vessels which conduct the blood for respiration into the lungs. But in the species which shed their gills, the vascular ramifications that communicate with them become obliterated, excepting two, which unite together to form a dorsal artery, each giving off a small branch to the lung of its particular side, so that the circulation of a Fish becomes thus converted into that of a Reptile. 286 REPTILIA. These animals have neither scales nor carapace, but the body is invested with a naked [and moist] skin, [over the surface of which the blood receives much of its oxygenation.] With the exception of one genus, they have no nails to the toes. The envelope of their eggs is simply membranous, and in most cases these are fecundated as they issue forth, the male attaching himself to the other sex in order to be simultaneous. Their eggs or spawn enlarge very much in the water after they have been laid. The young not only differs from the adult by the presence of its gills, but its feet are only developed by degrees, and in several genera there are also a deciduous beak and tail, and intestines of a different form. Some of the species are even viviparous. Tue Froes (Rana, Lin.)— Have four legs and no tail in their adult state. Their head is flat, the muzzle rounded, the mouth deeply cleft, and the greater number have a soft tongue attached only to the lower part of the gullet, but which extends forward to the jaw, and is doubled back above. Their fore-feet have only four toes, but the hinder sometimes show the rudiment of a sixth. Their skeleton is entirely deprived of ribs. A cartilaginous plate, even with the head, takes the place of tympanum, and renders the ear visible externally. The eye has two fleshy lids, and a third, which is horizontal and transparent, concealed by the lower one. The inspiration of air is produced simply by the movements of the muscles of the throat, which, by dilating, draw in the air through the nostrils, and, by contracting, whilst the orifices of the nostrils are closed by means of the tongue, force the air into the lungs. Expiration, on the contrary, is effected by the contraction of the muscles of the lower belly: so that, by opening the belly of the living animal, the lungs will distend without any power of contraction, and by holding open the mouth the animal will become asphyxiated, for want of air sent into the lungs. The embraces of the male are excessively prolonged: in reference to which the thumb of this sex is furnished with a spongy swelling, which enlarges during the season, and which is designed to aid in grasping. The eggs are fecundated at the moment they are laid, and the young is termed a ¢adpole. It is at first provided with a long fleshy tail, and a small horny beak, but with no other apparent members besides certain little fringes at the sides of the neck. These disappear after some days, but Swammerdam assures us that they still exist as gills underneath the skin. The latter-are minute _ crests, which are very numerous, attached to the four cartilaginous arches placed on each side of the neck adhering to the hyoid bone, and enveloped by a membranous tunic, which is covered by the general skin. The water, entering by the mouth, to bathe the intervals of these cartilaginous arches, passes out either by two orifices or by a single one, according to the species, pierced through the external skin, either on the middle or on the left side of the animal. The hind feet are gradually developed to view, by little and little, while the anterior likewise appear beneath the skin, but do not burst it for some time later. The tail is absorbed by degrees. The beak falls, and occasions the genuine mandibles to appear, which had previously been soft, and were concealed underneath the skin. The gills shrink and are obliterated, leaving the lungs to perform their functions unassisted by them. The eye, which in the Tadpole was only visible through a thinner space in the skin, becomes apparent with its three lids. The intestines, previously very long, slender, and spirally contorted, shorten, and acquire the enlargement of stomach and colon: the Tadpole living solely upon aquatic vegetation, whilst the adult animal preys on insects and other animal substances. * Finally, the limbs of the Tadpole reproduce the parts of them that had been mutilated, nearly as in the Newts. The particular epoch of each of these several charges varies, according to the species. In temperate and cold climates, the perfect animal buries itself, during winter, under ground, or in the mud below the surface of water, where it continues to live without food or respiration, [beyond what of the latter is effected by the surface of the skin] ; although, during the warm season, if it be held for a few minutes only with the mouth open, so as to impede the process of respiration, it perishes. Tue Frogs, properly so called, (Rana, Laurenti),— Have a slender body, and the hind limbs very long, and more or less palmated; their skin is smooth and slippery ; their upper jaw supplied all round with a range of minutely fine teeth, and they have an BATRACHIA. 287 interrupted range across the middle of the palate. The males have, on each side, under the ear, a deli- cate membrane, which is inflated with air when they croak. These animals both swim and leap with celerity. (One only (B. temporaria) is indigenous tv the British Isles.] Ceratrophrys, Boié,—are Frogs with a broad head, the skin wholly or partly granulated, and ahorn-like mem- branous prominence over each eyelid. Dactylethra,—South African species, with pointed toes, those of the hind-feet broadly palmated, and the three internal having their extremities enveloped by a conical nail, of a black horny substance. Hyla, the Tree-Frogs,—differ in no respect from the common ones, excepting that the extremity of each of their toes is widened and rounded into a sort of viscous palette, which enables them to adhere to the surfaces of bodies, and to climb trees, to which last they resort, during the summer, in pursuit of insects; but they deposit their eggs in water, and penetrate into the mud in winter, like other Frogs. Several species are decked in the gayest colours. Tue Toaps (Bufo, Laurenti)— Have the body thick and squat, and covered with tubercles, with a large swelling pierced with pores behind each eye, from which a fetid milky secretion is expressed; no teeth whatever; and the hind limbs but little elongated. They leap badly, and are generally found at a distance from water. They are animals of hideous, disgusting form, the saliva of which has been erroneously considered venomous, as also their teeth, their supposed urine, and even the moisture which exudes from the skin; [the latter being, in fact, absorbed by the skin, for the purpose of cutaneous respiration, often in great quantity, so that the animal, when seized and taken up, lightens itself by discharging a quantity of this from the anus. ] (Two species are found in Britain, viz., the Common Toad (B. vulgaris), which progresses more by leaping than crawling; andthe Natterjack (B. calamita), an inhabitant of heaths and commons in the south of England, which has a yellow mesial stripe along the back, never leaps, but creeps with considerable celerity, and utters a chirping cry. Its appearance is less unprepossessing than that of the other. ] Bombinator, Merrem,—only differs from Bufo by having the tympanum concealed beneath the skin. Rhinella, Fitzinger ; Oxyrhynchus, Spix,—has the muzzle pointed anteriorly. Atilophus, Cuy.—Muzzle angular, and a crest on each side of the head, extending round the parotid. Breviceps, Merrem; Engystoma, Fitzinger, in part.—No tympanum nor parotid visible externally, an oval body, the head and mouth very small, and feet but slightly palmated, Pipa, Laur.—The body horizontally flattened ; head large and triangular ; tongue wholly wanting ; tympanum concealed beneath the skin; small eyes placed towards the margin of the upper jaw; each of the front toes split at the tip into four little points; lastly, an enormous larynx in the male, formed as a triangular bony box, within which are two moveable bones which can close the entrance of the bronchi. The longest known species (R. pipa, Lin.) inhabits the obscure nooks of houses in Cayenne and Surinam, and has a granulated back, with three longitudinal ranges of larger granules. The male places the eggs of the female upon her back, where they are fecundated, upon which the female returns to the water, the skin of her back swelling so as to form a number of cells, which inclose each of the eggs, and wherein the young pass their tadpole state, until they have lost their tails, and developed their limbs, at which time the mother returns to land. THe SaLAMANDERS (Salamander, Brong.)— Have an elongated body, four limbs, and a long tail, which give them the general form of Lizards, whence Linnzus left them in that genus; but they have all the characters of Batrachians. Their head is flattened; the ear concealed entirely by the flesh, having no tympanum, but merely a little cartila- ginous plate over the fenestrum ovale ; both jaws furnished with numerous minute teeth; two longi- tudinal ranges of equal teeth on the palate, but attached to the bones that represent the vomer ; tongue as in the Frogs, no third eyelid; a skeleton with three small rudiments of ribs, but no bony sternum ; a pelvis suspended by ligaments to the spine; four toes before, and nearly always five behind. They respire, in the adult state, in the same manner as the Frogs and Tortoises. Their tadpoles breathe at first by gills in the form of crests, to the number of three on each side of the neck, which are subse- quently obliterated, and which are suspended to cartilaginous arches, that form portions of the hyoid bone of the adult. A membranous operculum covers these apertures; but the gill-crests are never in- closed within a tunic, but float loosely. Their fore-feet are developed before the hind, and the toes appear successively. The terrestrial species (Salamandra, Laurenti) have, in the perfect state, a round tail, and only remain in the water during their state of Tadpole, which endures but for a brief period, and when they resort to that element to breed. Their eggs are inclosed in an oviduct. Those of Europe have, on each side of the occiput, a gland analo- gous to that of the Toads. The Aquatic Salamanders (Triton, Laurenti) permanently retain the vertically-compressed tail, and pass nearly their whole lives in the water. [It is certain, however, that those of Britain all leave the water at the end of summer, and have then a round tail. ‘The small ones, even with the remnants of their gills still attached, may be 288 REPTILIA. found in abundance at that period about the roots of rushes, &c., in the vicinity of ponds; whence it is not true that they quit in consequence of the water being dried up, as has been suggested]. The experiments of Spallanzani, on the extraordinary power which these animals have of reproducing their parts, have rendered them celebrated. ‘They renew, many times successively, the same member after it had been severed; and this with all its bones, muscles, vessels, &c. Another faculty, not less singular, consists (as shown by Dufoy) in their recovering after having been long frozen up inice. Their eggs are fecundated by fluid dispersed in the watery medium, which penetrates with the water into their oviducts. They lay long chaplets of eggs, and the young appear fifteen days from the deposition of them, retaining their gills for a longer or shorter period according to the species. Modern observers have distinguished several European species, the males of which develope high membranous dorsal crests very early in the spring, [which are absorbed, and the remnants cast off, ere they leave the water at the end of summer. One, with a smooth olive-coloured skin like a Frog (T. punctatus), and handsomely spotted with black, is common in stagnant waters throughout Britain; and two others (7. palustris and T. marmoratus), with a granulated skin like a Toad, and also spotted upon a much darker ground, and punctated with white, are—the first at least—equally so. All have the under parts bright orange colour. Those with granulated skins resemble the Toads in the capability of remaining without food for a most extraordinary period, in a state of imprisonment, having been found occasionally in closed cavities, where they must have remained for many years.] The skeleton of an animal of this genus has been found among the schists of GEningen, which is three feet in length. It is the pretended fossil man of Scheuchzer. In the suite of the Salamanders should range several very similar animals, some of which are reputed never to have gills, while others, on the contrary, retain them permanently, notwithstanding which they have the same lungs as the other Batrachians, being thus the only vertebrated animals that are truly amphibious. The former of these, which have never been seen with gills, fall under two genera. THe Mewnopoma, Harlan. Form altogether that of a Salamander, the eyes apparent, feet well developed, and an orifice on each side of the neck. Besides a range of fine teeth surrounding the jaws, they have a parallel range before the palate. The known species, fifteen to eighteen inches in length, inhabits North America, where it is termed Hell-bender. THE AmMpHiuMA, Garden,— Has also an orifice on each side of the neck, but the body is excessively elongated ; the limbs and feet, on the contrary, but little developed; and the palatal teeth form two longitudinal ranges. Likewise from North America. Among those which permanently retain their gills, THE AxoLorLis,— Altogether resemble the tadpole of a Salamander. They have velvety teeth to both jaws, and two bands of the same upon the palate. From Mexico. Tue Menosrancuus, Harlan,— Has but four toes to each foot; a range of teeth on the intermaxillaries, and another parallel but more extended range, on the maxillaries. Tue Proteus, Laurenti. Three toes before, and only two behind; the muzzle lengthened and depressed; both jaws furnished with teeth; tongue but slightly moveable, and free anteriorly ; eyes excessively small, and couched be- neath the skin, as in the mammiferous genus Spalax ; ear covered by the flesh, as in the Salamanders ; and skin smooth and whitish. The skeleton resembles that of the Salamander, except that it has many more vertebrz, and fewer rudiments of ribs; but the general conformation of the skull is very different. Inhabits the subterranean waters, with which certain lakes in Carniola communicate. Tue Syrens (Syren, Lin.)— Are elongated animals, having nearly the form of Eels, and three branchial crests; no hind feet, nor even vestige of pelvis; head flatiened; mouth not deeply cleft; muzzle obtuse; eye very small; ear concealed ; lower jaw armed with teeth all round, but none in the upper; and two raised series on each side of the palate. One species (S. lacertina, Lin.) attains a length of three feet. Others are smaller, with the branchial crests less developed, and compose the Pseudobranchus of Gray. THE FOURTH CLASS OF VERTEBRATED ANIMALS. THE FISHES—(PISCES). [Fishes are the proper vertebrated inhabitants of the waters; and they are formed and organized for living, moving, and in general finding their food, wholly within this element. The nature of their locality necessarily makes their history obscure, because human observation extends to only a very limited portion of the waters, and in that portion to only a trifling depth; but when we consider that, exclusive of lakes and rivers, the seas occupy full seven-tenths of the earth’s surface, that those seas yield food as far down as the rays of the sun can extend their life-giving energy, and that there is no obstacle in the water to bar the motions of the fish, we can at once see that, of all vertebrated animals, they must be the most numerous, and probably they exceed in numbers the whole of the other three classes of the same grand division of animated nature. They inhabit, stratum super stratum, as it were,—one species near the surface, another near the bottom, and others, again, range through the intermediate depth. What may be the absolute depth of the ocean waters at which life ceases, and the profound of death and darkness begins, we have no direct means of ascertaining. It varies, of course, with the latitude, being greater as the rays of the sun are more direct, and less as their obliquity increases ; and it probably also varies with the nature of the bottom. In correspondence with the vast range of pasture which is assigned to the Fishes, their productive powers are enormous,—the young produced by one Cod-fish, at a single deposit, being ascertained to be not much less than four millions, while in the common Flounder they are not fewer than one hundred and fifty thousand. A fertility so enormous, as compared with anything we are acquainted with on land, of itself shows the importance of the Class, and how well they are adapted for supplying each other with food. But, interesting as it is, the space to which we are restricted, forbids any disquisition on their physiology; and all that we can accomplish, is to render the text of the last edition of Cuvier’s great work, as faithfully in substance, and as briefly im expression, as we possibly can. Our own original remarks must necessarily be few; and we shall inclose them in brackets, the same as this introductory paragraph, to dis- tinguish them from the substantive part of the genuine text of Cuvier, which, in the way of systematic arrangement, has received no improvement, since the science of Zoology was deprived of that foremost of its cultivators. ]} Fishes are oviparous Vertebrata, with a double circulation, and respiring through the medium of water. For this purpose they have, on each side of the neck, branchie, or gills, consisting of arches of bone attached to the os hyoides, or bone of the tongue ; and to these arches the filaments of the gills are attached, generally in a row upon each, and having their surfaces covered by a tissue of innumerable blood-vessels. The water taken in by the mouth passes through among the filaments of the gills, and escapes by the gill-openings towards the rear. In its progress through the filaments of the gills, the water imparts to these the oxygen of the air which it contains [and receives carbon in return, the same as in the lungs of an air-breathing animal. The gills of a fish do not decompose water, so as to derive oxygen from it, but merely sepa- U a rere ae LS UN ee OE 290 VERTEBRATED ANIMALS. rate the oxygen from the atmospheric air contained in the water; and hence, if water is deprived of this air, or impregnated with deleterious gases, Fishes cannot live in it. As little can they bear the return of water entering at the gill-openings, and escaping by the mouth ; for if a fish is held so that the water is made to pass in this direction, it is as speedily drowned as if it were an air-breathing animal]. The blood is brought to the gills by the heart, which thus answers to the right ventricle of warm-blooded animals; and from the gills it is sent to an arterial trunk, lying immediately upon the under side of the back bone, which trunk is the left or systematic ventricle of the heart, and sends the blood throughout the body of the fish. Living habitually in water, which is of very nearly the same specific gravity as their bodies, Fishes have no weight to bear, but merely to propel themselves through the water; and their form and their organs of motion are all adapted to this one purpose, though varying in the species. In many, there is under the spine a membranous air- bladder, which the fish can expand or contract at pleasure; and this is understood to alter its gravity, and enable it to suspend itself at any depth in the water. [Many fishes, wanting this apparatus, have, however, nearly the same habits as others which are possessed of it. ] Progressive motion is effected by the tail striking alternately right and left against the water, [for which purpose the flexure of the spine is lateral, whereas in the other Verte- brata generally, the principal flexure is vertical], and perhaps the jet of water thrown backward from the gill-openings may assist. Thus a fish has but little use for extremi- ties; and the parts analogous to legs and arms are accordingly very short, terminating in a number of rays analogous to fingers and toes, and these, covered by membranes, form what are termed fins. The fins answering to arms are called pectorals, and those answering to legs ventrals; and besides these there are cften fins on the back called dorsal, behind the vent called anal, and on the extremity of the tail called caudal, The texture of the fins is important in classification. If the rays consist of single bones, whether stiff or flexible, they are said to be spinous ; and if they consist of a number of jointed pieces, divided at their extremities, they are called soft, or articulated. The pectorals are attached to two bones immediately behind the gills, and answering to the scapulars, which bones are sometimes imbedded in the muscles, or attached to the spine, but generally to the bones of the head. The pelvis rarely adheres to the spine; and it is often in advance of the belly, and attached to the bones of the shoulders. The vertebre have their proximate surfaces concave, and filled with cartilage, which forms the joints, and is generally continued by an aperture through the centre of each vertebra. Spinous processes, upwards and downwards, support the muscles, and main- tain the vertical position of the body; but, as far as the cavity extends, the downward processes are wanting, and there are transverse processes, to which the ribs are some- times soldered by cartilages. The head varies much in form; but in general consists of the same number of bones as in the other Vertebrata,—a frontal of six pieces, parietals of three, occipitals of five, and five of sphenoid and two of each temporal bone, are included in the composition of the cranium. Besides the brain, which is disposed as in Reptiles, Fishes have nodes or ganglions at the base of their olfactory nerves. The nostrils are simple cavities at the end of the muzzle, always pierced with two holes, and lined by a regularly-plaited pituitary mem- PISCES. 291 brane. In their eyes, the cornea is flat, and there is a little aqueous humour, but the crystalline lens is almost spherical, and very hard. The ear is a sac, in which are sus- pended small hard bodies; and there are three membranous canals within the cranium in ordinary fishes, but in its walls in the cartilaginous ones. They want the Eustachian tube and tympanal bones; and only the Sharks and Rays have an external opening, which in them is level with the head. As great part of the tongue is bony, and as it is often furnished with teeth and other hard parts, Fishes can have little sense of taste. The fleshy cirri, or beards as they are termed, of some of the species, are perhaps organs of touch. The body is in general covered with scales, and generally speaking they have no organ of prehension except the mouth. In most fishes, the intermaxillary bone forms the edge of the upper jaw, having the maxillary or the labial behind it. The palatal bones, pterogoid and zygomatic pro- cesses, and the tympanum and squamosa, form an anterior jaw, as in Birds and Serpents, to the posterior part of which the lower jaw is articulated, which jaw has generally two bones in each side, except in the cartilaginous fishes. The teeth are very various in situation, in number, and in form. They are found on the intermaxillaries, the max- illaries, the lower jaw, the vomer, the palate, the tongue, the gill-arches, and even on the bones of the pharynx behind these; [but many fishes have them only on some of these places, and there are some which are almost, if not altogether, toothless]. Besides the gill-arches, the hyoid bone supports the gill-membrane. The gill-lids, or operculi [by the working of which respiration is carried on], consist of three pieces, the operculum, sub-operculum, and inter-operculum. These are articulated on the temporal bone, and play on the pre-operculum; but many of the cartilaginous species want them. The stomach and intestines differ greatly ; and, except in cartilaginous fishes, the pancreas is supplied by ceca round the pylorus, or by a duplicature of the intestine. The kidneys are against the spine, but the bladder is above the rectum, and opens behind the vent and the reproductive passage, contrary to what is found in the Mammalia. The male organs are large glands termed mi/ts, and the female are sacs, which also attain great size, and have the eggs in their internal folds. In most fishes, there is no im- pregnation till after the expulsion of the eggs; but in the Sharks and Rays, and some others, the case is different, some of them producing perfect eggs, and others bringing forth the young alive. The proper classification of Fishes is a very difficult matter. ‘There are two distinct series of them:—FisuEs, properly so called, or Bony Fishes ; and Cartilaginous Fishes, or Cuonproprerycu. The latter want some bones of the jaws, and have other pecu- liarities: they are divided into three orders ;— Cycxostomt (round-mouths, or suckers), which have the jaws soldered into a sort of ring, and numerous gill-openings. Srracui (Sharks and Rays), which have gill-openings similar to the former, but the jaws not soldered into a ring. Sturrones (Sturgeons), which have the gill-openings with a lid, as in the Fishes properly so called. Of the Orpinary Fisues, or those with bones in the skeleton, one order have the maxillary bone and the palatal arch fixed to the cranium. These are called Piecro- enatui (soldered jaws), and they consist of two families: Gymnodontes (naked teeth), and Sclerodermi (hard skins). Another order, the Lornosrancuir, which consists U 2 999 PISCES. but of one family; and which, with the jaws perfect, have the filaments of the gills arranged in tufts upon the arches. In the rest, which include by much the greater number of the True Fishes, the cha- racter employed by Ray and Artedi, and taken from the nature of the first rays of the dorsal and anal fins, furnishes two principal divisions. ‘These are MaLacoprEryGil (soft fins), in which all the rays, with the occasional exception of the first dorsal or the pectorals, are soft or jointed; and Acanruorreryeir (spiny fins), in which the first portion of the dorsal, or first dorsal when there are two, always have spinous rays, and which have also some in the anal, and at least one in each ventral. The first of these sub-classes may be divided according to the position of the ventral fins. If these are on the belly, the fishes are Abdominal ; if attached to the shoulder, they are Sub-brachian ; and if wanting, they are Apodal. Each of these orders com- prises certain families, of which the abdominal ones are very numerous. The Spinous Fishes do not admit of this kind of division; but must be separated into families, the characters of which are, in many instances, well defined. The same gra- dation of families cannot be traced among Fishes as among Mammalia. Thus, the organs of sense, and those of generation in some, indicate connexion between Cartilaginous Fishes and Serpents, while the imperfect skeleton of others of these fishes indicates a relation to Mollusca and Worms, [though the far more important disposition of the nervous system, characteristic of the type of Vertebrated Animals, is still retained. The abstract of Cuvier’s arrangement of Fishes, by far the best—that is, the most natural, which has hitherto been made, or which there are materials for making—may be given briefly thus:—The series of True or Bony Fishes he divides into the two divi- sions already mentioned, as distinguished by the rays of the fins. The Spinous Fishes form a single order, and this order he divides into fifteen families, which he names, from some well-known species as the type, or for some marked peculiarity of character which belongs to the whole of the family and to no other fish. The Soft-finned Fishes he divides into three orders, according as the ventral fins are abdominal, thoracic, or wanting; and the Cartilaginous Fishes he divides into two orders,—those with free gills, and those with the gills fixed. ] THE FIRST ORDER OF BONY FISHES. ACANTHOPTERYGII. This first order contains by far the greater number of the Ordinary Fishes. Their characters are spinous rays in the first dorsal, if there are more than one, and spinous rays in the first part if there is one only; but sometimes, instead of a first dorsal, they have free spines without any connecting membranes. The anal fin has also its first rays spinous; and there is generally one such ray in each ventral. [When we speak of the first ray of a fin, we mean the one nearest the head of the fish, which is easily understood in the other fins, and is the extreme one either above or below in the caudal. | The spinous fishes are arranged into fifteen families, and some of these families contain a vast number of genera. The families are named, as already noticed, from some well-known species, or some strikingly peculiar character. [When a species is the type, the technical name of the family ends in ide@ or oide, the Greek word for resemblance; and when it is founded on a peculiar character, the name is descriptive of that]. ACANTHOPTERYGIL. 293 THE FIRST FAMILY OF THE ACANTHOPTERYGII. Prercip& (the Percu Family). These fishes have the body oblong, covered with hard or rough scales, with the gill-lid or gill-flap, or often both, toothed or spinous in the margins. The species are very numerous in the waters of all warm countries ; their flesh is in general agreeable and wholesome ; they are mostly thoracic, or have the ventral fins under the pectoral, and they are subdivided according to the number of gill rays. The first division have seven rays in the gills, two dorsal fins, and all their teeth are velvety. [Cuvier makes use of this expression as descriptive of very minute teeth, set closely together in numerous rows, and thus resembling the pile of velvet in arrangement though not in texture.] This division comprises various species, of which the following are the principal genera:— Perca, including the Common Perch of Europe, and various other species of North America and other places ; Labrax, the Basse, a marine genus, of which species are found both in Europe and in America; Lates, the Perch of the Nile, of which there are also species in the Indian rivers ; Centropomus, the Sea Pike, which has the oper- culum obtuse and without spines; Grammistis, an Indian genus, with white longitudinal stripes, and a black ground ; Arpro, the River Perch, found chiefly in the Rhine ; Zingel, a peculiar Perch of the Danube, with thirteen spines in the first dorsal. This subdivision also comprehends some fishes of foreign countries, whose peculiarities cause several subgenera. These are, Huro, like a true Perch, only the pre-operculum is not toothed; felis, with hooked teeth in the jaws, but not in the palate ; Niphon, with strong spines on the pre-operculum and operculum ; Enoplosus, like a Perch, but with body much compressed, two high dorsals, and the pre-operculum deeply toothed ; Diplorion, compressed, double-toothed border to the pre-operculum, and two spines on the gill-lid. Other species of this subdivision are, Apogon, small fishes, of a red colour, with two dorsals far apart, and large scales, easily separated. One of them, the King of the Mullets, or Beardless Mullet, is found in the Mediterranean ; Chetlodipterus, resembling the former, but with long teeth in the jaws; and Pomatomus, a very rare genus, of small size, with immense eyes, and exceedingly small teeth, velvety in their arrangement. A second subdivision have two dorsal fins, but long and pointed teeth, mingled with a velvety arrangement. Of these the principal genera are Ambassis, with the dorsals near each other, and a spine in front of the former ; they are small fishes of the warm regions of the East, abundant in pools and rivulets, and sometimes prepared as Anchovies; and Lucio-perca, the Perch-Pike, with long teeth on the maxillaries, and and also in the palate, found in Eastern Europe. The second division of the Perches have seven rays in the gills, but only one dorsal fin; the genera are arranged by the characters of their teeth, and the leading ones are these :— Serranus, the Sea Perch; Anthias, the Barber, a beautiful red fish of the Mediterranean, with metallic reflec- tions; Merous, the Great Perch, and some varieties. Distinct from these are several genera, Plectrepoma, Diacopus, Mesoprion, Acerina, Rypticus, Polyprion, Centropristis, and Gristes. These inhabit different parts of the world, and some of them are beautiful fishes. The Percide with less than seven gill-rays, are arranged according to the number of their dorsal fins and the characters of their teeth. With a single dorsal, some have hooked teeth among the other ones, as Cirrhites, which inhabit the Indian Ocean, and have six gill-rays. Others have only small teeth, among which there are the following genera, Chiro- nemus, Pomotis, Centrachus, Priarcanthus, Dules, Therapon, Palates, and Elotes. These are chiefly fishes of the warm countries, some of the fresh water and others of the sea; their colour is in general silvery, marked with blackish longitudinal lines. There are two genera of Percide which have less than six gill-rays and two dorsals. These genera are Tyichodon, a native of the North Pacific ; and Si//ago, found in the Indian Ocean. One of the latter is supposed to be the finest fish in India. + We now pass on to other Percide, which have more than seven gill-rays, and seven soft rays besides a spine in their ventrals, the other Acanthopterygit having never more than five soft rays. The genera, Holocentrum, Myripristis, Beryx, and Trachichthys, all of which are brilliant fishes of the warm seas, and some have the air-vessel divided into two parts. All the Percide hitherto mentioned have the ventrals immediately under the pectorals ; but there are others which have them differently placed. The Jugular Percide have the ventrals upon the throat farther forward than the pectorals. They comprehend the following genera :— Trachinus, the Weevers, with the head compressed, the eyes near each other, the mouth obliquely up- a | A a OS) UAL a Eon 100 oP PISCES. wards, the first dorsal very short, but with a formidable spine on the first ray, the second dorsal long, the pectorals large, and a strong spine on the operculum. ‘These fishes lie in the mud, and inflict severe wounds with their dorsal spine, which the fishermen believe has a poisonous quality, but it is merely rugged, and lacerates an ill-conditioned wound, similar to what is inflicted by the antler of a Stag. Percis, which resemble the Weevers, and inhabit the warm seas, have crooked teeth on the maxillaries and the vomer, but none on the palatal bones. Pinguipes, also of the warm seas, more sluggish than the preceding genus, with the teeth strong and conical, fleshy lips, and teeth on the palate. Percophis, with the body very long, some of their teeth long and pointed, and the lower jaw much advanced. One very remarkable genus of Percidw is Uranoscopus, the Star-gazer, so called because the eyes are placed on the upper surface of the nearly cubical head, and directed toward the heavens. Their-pre-operculum is tcothed on the lower part ; their mouth is cleft vertically ; they have a strong spine on each shoulder, and only six rays on each gill, Within their mouth, behind the tongue, is a narrow slip which they can protrude, and with which they attract small fishes, while themselves are concealed in the mud. Their gall bladder is of immense size. One species, U. scaber, inhabits the Mediterranean, but none of the others are European. This is a very ugly fish, but still it is eaten. The third division comprises the 4)dominal Percide, or those which have the ventral fins behind the pectorals. One genus has them still partially attached to the bones of the shoulder. This is Polynemus (many fillets), so called because the inferior rays of their pectorals are filled and extended into long threads. Their teeth are in part velvety, like those of the true Perches, and partly also like those of a Carp, and they have them on the maxillaries, the vomer, and the palate. Their snout, however, is rounded, and the vertical fins are scaly. They are found in the waters of warm countries, and one, P. paradiseus, of a beautiful yellow colour, with seven filaments from the fin on each side, at least twice as long as the body, is the celebrated “‘mango fish” of the Ganges, reckoned the most delicious in India, Most of the other species have the filaments shorter, but the flesh of all of them is excellent. The following genera have the ventrals still farther behind, and the bones of the pelvis quite detached from the bones of the shoulder. Of these there are several :— ; Sphyrena, the Sea Pike, which has been confounded with the Zsox or True Pike. They are large fishes, with an oblong head and projecting under jaw. There are several species inhabiting the warmer seas, and one, S. barracuda, is as much dreaded as the White Shark. Paralepis, small fishes, resembling the last genus in general characters, but with the second dorsal fin small and fleshy. Mudlus, the Sur- mullet, a very celebrated genus, and held in much estimation by epicures. These fishes must not be confounded with the Mullets properly so called, which give name to another family, and are typical of it, being very different in form and appearance from the Surmullets. The latter have the body thick and oblong, with the profile of the head nearly vertical, the eyes far up, teeth in the lower jaw and palate only, two cirri inwards at the lower jaw, and but four rays in the gills. There are two species, both of which are European, the Striped Red Mullet, W. swrmudatus, which is not very uncommon on the southern coast of England; and the Plain Red Mullet, 7. barbatus, which, though named as a British fish, is chiefly found in the Mediterranean. Both species are delicious eating ; and the luxurious Romans used to feast their eyes with the changes of colour in the Red Mullet when dying, before they devoured its flesh. Upeneus is a genus of the tropical seas, with teeth in both jaws, but none in the palate. They have only four gill-rays, like the Surmullets, but have also an air- bladder, which the latter are without. These complete the family of the Percide, as now known. THE SECOND FAMILY OF ACANTHOPTERYGII. FisHes witH Harp CHEEKS. This family comprehends a number of fishes of which the appearance of the head is singular, being variously mailed, or defended by spines and scaly plates of hard matter ; but they have many characters in common with the Percide. Their principal distinction consists in the suborbital bone being more or less extended over the cheek, and articulated with the operculum. The Star-gazer is the only genus of the Perch family which resembles them in this respect ; but in it, though the suborbital bone is very broad, it is connected posteriorly with the temporal bones, and not with the operculum. The following are the principal genera :— Trigla, the Gurnards, so called from the sounds which they utter with their gill-lids when taken out of the water. hey have an immense suborbital plate, to which the operculum or gill-lid is articulated by an immoyeable suture, so as to be incapable of separate motion. ‘They have the head vertical in the sides, hard and rough bones, two distinct dorsals, three free rays under the pectorals, twelve cceca, and an air-bladder of two lobes. The Gurnards properly so called, have small teeth in both jaws, and in front of the vomer, together with large pectorals, but not sufficiently so for raising them out of the water, like those of the Flying Fishes. There are many species found in the temperate seas, which, though in estimation for the table, are inferior in this respect to the Sur mullets. ‘The English species are 7. cuculus, the Red Gurnard, with strong plates in the cheeks, the body ACANTHOPTERYGIL. 295 lengthened, and nearly round, one spinous and one soft-ray dorsal fin; seven rays in the gills, gill-opening large, and with three free rays at the base of each pectoral. 7. Hirundo, the Sapphirine Gurnard, with the pectorals of immense size, but in most of its other characters analogous to the Red Gurnard. It is more abundant than that species, and grows toa larger size. Is rather a dry fish, but the flavour is tolerably good, and it answers very well for salting. There are various other species, chiefly found in the Mediterranean. The following genera, which are closely allied to the Gurnards, deserve some notice :— Prionotus, an American fish, resembling the Sapphirine Gurnard, but with the pectorals so large, that they can support the body during a considerable leap through the air. They have a characteristic band of small teeth, closely crowded together, upon each parietal bone. Peristidion, a genus having the whole body mailed with large hex- agonal scales, ranged in longitudinal rows. Their muzzle is divided in two, and there are cirri to the mouth, but no teeth. Dactylopterus, celebrated as Flying Fishes. ‘They have the subpectoral rays numerous, longer than the body, and united by a membrane, so as to furnish large supplemental fins, by means of which the fishes can protract their fall for a few minutes, when they spring from the water to escape the Coryphenes, and other ene- mies ; but as the fishes cannot fly, or take a new impulse from the air, they speedily fall down and become the victims of the pursuers. ‘They are found in the Mediterranean aud Indian Ocean; and are small fishes, seldom more than a foot in length. Cephalacanthus, resembles the former, with the exception of the supplementary fins, or wings, as they are sometimes improperly called. Cotfus, the Bull-head, of which there are several species. They have the head depressed, with teeth in both jaws and in the front of the vomer, the gill-lids furnished with spines; gills with six rays, and large openings, bodies slender, and without scales ; two dorsals, near to each other, and the ventral fins small. Of these, C. gobio, the Miller’s Thumb, is found in rivers; C. bubalis, which has the gill-lids very spiny, C. quadricornis, with four short spinous processes on the top of the head, are found in the sea: besides these there are some foreign species. Apidophorus, the Pogge, sometimes termed the Armed Bull-head, has the body octangular, and covered with scaly plates, with recurved spines on the snout, and teeth in the jaws only; it is a genus found in the Northern Atlantic and Pacific, but the species are small and unimportant. Some groups, recently known, have the characters of Cottus, and of Scorpena. Of these we may notice Hemitripterus, with two dorsals, a bristly head, and no scales ou the body; it varies in length from one to two feet, and is found on the American shores. Hemilepidotus, has only one dorsal; teeth in the palate, and longitudinal bands of scales, which are not visible till the body is dried; it occurs in the Pacific. Platycephalus, is found in the Indian Ocean. It has large ventrals, with six rays placed behind the pectorals ; the head depressed, and sharp and spinous at the sides, but not operculated. There are seven rays in the gills, a row of sharp teeth in the palate, and the body covered with scales. Scorpena, of which there are two subgenera, which have the head rough, and hardened with plates, and are com- pressed laterally; the body is scaly; and there is one dorsal fin. Except in the singular appearance of their armed and tuberculated heads, they very much resemble the Perches. The subgenera aye Scorpena, without scales, but armed with spines, which are accounted dangerous. ‘They are a gregarious fish, and have their haunts among the rocks. Some allied species have the body much compressed, and a very high dorsal fin, united to the caudal. Sebastes, the Norway Haddock, rather a large species, with many spines on the head, a long dorsal, of which the posterior portion has soft rays; the eyes very large, and teeth in all the jaws. it inhabits the northern seas, and the Greenlanders use its spines as needles. Pterois, Indian fishes, resembling the last genus, but with no lateral and pectoral rays; remarkably long; their colour very beautiful; and no teeth in the palate. Blepsias, inhabits the North Pacific; has hard cheeks, cirri on the lower jaw, five gill-rays, small ventrals, and one dorsal, consisting of three lobes. Apistes, Treacherous, are small fishes, having a formid- able spine on the suborbital plate, and branched rays in the pectorals. Some have scales, andsome not. Agriopus, want the spine of the former, have the dorsal very high, and reaching to between the eyes, a narrow muzzle, and the body without scales. Pedor, like Scorpena in their teeth ; two free rays in the pectorals, head flat, eyes close together, dorsal spines very high, and whole appearance singular. Synanceia, as ugly as the former; the head shapeless, tuberculated, and the skin loose. No teeth on the vomer or palate. Like most of the analogous genera, they inhabit the warm seas, and this genus is considered poisonous. Monocentris,—body short, thick, com- pletely covered with rough, angular plates, four or five stout spines in place of the first dorsal; each ventral a single large spine; head and mouth large; teeth on the jaws and palate, short and crowded; found near Japan. Gasterosteus, Stickleback, a numerous and very common genus, found both in fresh waters and the sea. Named from the free spines on the back, anda bony covering on the belly. Their ventrals, placed behind the pectorals, consist only of a single spine, and they have but three rays and gills. There are several European species, distinguished chiefly by the number and character of their spines. Though of small size, they are exceedingly voracious. Orveosoma, a small oval fish, with its body all covered over with scaly cones; only one species is known. THE THIRD FAMILY OF THE ACANTHOPTERYGII. Scianip& (the Maiere Family). These still resemble the Perches in the notches of the pre-operculum and operculum; but they have no teeth on the vomer or palate. The muzzle is thickened, and there are a few scales on the dorsal fins, of which fins some genera have one and others two. The following are the principal genera :— 296 PISCES. Sciena, of which there are seven subgenera. ‘The general characters are,—the head inflated, and supported by cavernous bones ; two dorsals, or one deeply notched, the soft part much longer than the spinous; the anal short, the pre-operculum toothed, and the operculum divided into points at its extremity; seven arches in the gills. They resemble the Perches, only they have no teeth in the palate; their whole head is scaly, their air-bladder often curiously fringed, and the stony appendages in the ear larger than in most fishes. The following are the subgenera :— Sciena, or Maigres, properly so called, which have the spines of the anal weak, and neither elongated canine teeth nor cirri at the mouth. One species, S. wmbra, inhabits the Mediterranean, and used to be highly esteemed, but has latterly become rare. It grows to the length of six feet or more. Some other species of this subgenus are found in the Southern and Indian Seas. Otolithus, has the anal spines weak, and no cirri, some elongated or canine teeth, and two horns attached to the air-bladder, and erected forwards. They are Indian and American fishes; one is known as the Stone Perch of Pondicherry. Ancylodon, resembles the former, but has a short muzzle, long canine teeth, and a pointed tail. Corvina, small and crowded teeth, with neither canines nor cirri; the second anal spine rather strong. One, species, C. nigra, is abundant in the Mediterranean, and there are others in the Indian and American seas. Johnius, resembles the last, but has the second anal spine weaker, and shorter than thesoft rays. They are found in the seas of India, Tropical Africa, and America, and are esteemed as food, their flesh being white and easy of digestion. Umbrina, distinguished by a cirrus on the lower jaw. A remarkably beautiful fish, found plentifully in the Mediterranean, and occasionally on the southern coasts of Britain. Its ground colour is golden, with bright bands of steel blue; and its flesh is excellent. It is not a very long fish, but is sometimes forty pounds in weight. Pogonias, somewhat like the former, but with several cirri below the jaw. Some of them are silvery, and attain the size of an Umbrina. This fish produces much more sound than any of the other Sciznide, on which account it is sometimes called the Drum-fish. Eques, has a long and compressed body, elevated at the shoulders, and tapering to the tail; the teeth are small and closely set ; the first dorsal is high, the second long and scaly ; and they all belong to the American seas. The Scienide with a single dorsal fin, are subdivided according to the number of the gill-rays. Those which have seven, correspond to some genera of the Sparidz, and have the pre-operculum always notched. The following genera have seven gill-rays :— Hemulon, has the muzzle lengthened, resembling that of a Hog; the lower jaw compressed, opening very wide and of a bright red. Hence they are called “ Red-throats”’ in the West Indian Islands. Their teeth are small, and closely set; and their dorsal fin is slightly notched, having the soft part scaly. They inhabit the American seas. Pristipoma, have pores in the jaw, like the last species, but the muzzle thicker, the mouth not so deeply cleft, and their dorsal and anal fins without scales. The obtuse angle of the operculum is concealed by a membrane. They are numerous, and inhabit the warm latitudes of both oceans. Digramma, resemble the last-named, except that the cavity of the symphysis is wanting, and there are two large pores beneath each side. They are found in both oceans. Those of the Atlantic have large scales, and those of the Indian Ocean smaller, and a shorter and thicker muzzle. The Scizenide with a single dorsal, and less than seven gill-rays, admit of more subdivision. Some have the lateral line extending to the caudal fin, others have it interrupted. The following genera possess the former character :— Lobotes, have the muzzle short, the lower jaw prominent, the body high, and the posterior angle of the dorsal and anal fins so elongated, as, with the rounded candal fin, to appear in three lobes. There are four groups of very small points near the end of the jaw. They inhabit both oceans. Cheilodactylis, have the body long, the mouth small, many spinous rays in the dorsal, and the lower rays of the pectorals simple, and produced beyond the membrane. Scolopsides, have the second suborbital plate toothed, and terminated by a point directed backwards, crossing another point of the third suborbital, directed the contrary way. The body is oblong, mouth little cleft, teeth velvety, scales large, and no pores in the jaws. They inhabit the Indian seas. Micropteres, have the body oblong, three spines on each side of the jaw, and the last rays of the soft part of the dorsal separated from the others, and forming a small peculiar fin. They have the operculum without notches. The Sciznidz with less than seven gill-rays, and the lateral line interrupted, form several genera of small oval fishes, generally finely coloured, and distinguished by the armature of their heads. They have a nearer relation to the genus Chetodon, and resemble some of the fishes with labyrinthic branchie. The following are the genera :— Amphitrion, with the pre-operculum and three operculum pieces dentelated, the latter produced on a single row of blunt teeth. Pomacentres, have the pre-operculum denteiated, the operculum without armature, and a single row of trenchant teeth. Premnas, have one or two stout spines on the suborbital, and the pre-operculum toothed. Dascyllus, resemble Pomacentres, except in having the teeth very small, and thickly crowded. All the genera in- habit the Indian seas. Glyphisodon, with the gill-lids entire, and a single row of trenchant and generally notched teeth. They are found in the Atlantic, but more abundantly in the Indian seas. Helianus, resemble the preceding genus in their operculum, but have the teeth small and velvety. ACANTHOPTERYGII. 297 THE FOURTH FAMILY OF THE ACANTHOPTERYGII. Sparip (the Sea-pream Family). These have no teeth in the palate; their general figure resembles that of the preceding family; their bodies have scales larger or smaller, but they have none on the fins; their muzzle is not thickened, nor the bones of the head cavernous; they have no notches in their preoperculum, nor spines on the oper- culum; their pyrolus has ccecal appendages ; they have six gill-rays, which are arranged according to the form of the teeth. The first tribe, of which there are five genera, have the sides of the jaws set with round, flat teeth, resembling a pavement. The genera are as follow :— Sargus, with cutting teeth in the front, like those of Man; but in some species the teeth vary. Chrysophris, Gilt-heads, with round grinders in the sides of the jaw, and a few blunt conical teeth in front. There are two European species: C. auratus, a large and beautiful fish, with a golden eyebrow; and C. microdon, with the teeth smaller, and the profile fuller. The first species is occasionally found on the south coast of England. They have very strong teeth, and are able to break the hardest shells of the Mollusca. Pagrus, has only two rows of grinders. P. vulgaris, silvery, glossed with red, inhabits the Mediterranean, and is occasionally met with on the English shores. There are others in the Atlantic and the Indian Ocean, and one of Southern Africa, which has the jaws as hard as stone. Pagelus, has the teeth smaller, and the muzzle more elongated. P. erythrinus, the Spanish Bream, is silvery, glossed with rose-colour: it is a very beautiful fish. There are numerous others found in the Mediterranean and other seas; but the species named is the only one that occurs on the English coast, excepting the Sea Bream, P. centrodentus, which is of the same colour as the fornier, but has a large dark patch on the shoulder. Dentex, has all the teeth conical, and the front ones hooked. One species, D. vulgaris, occasionally occurs in the south of England, and there are various others. Some have the mouth less cleft, the body lower, and the caudal scaly to the end; and others have no scales on the cheek, but a pointed scale between the ventrals, and one above each of them. These form a second tribe of the family: and a third tribe also consists of a single genus,— Cantharus, which has crowded teeth, hooked, and placed cardwise round the jaws. One species, C. griseus, of a silvery grey colour, with brown longitudinal stripes, is found on the English shores, and known as the Black Bream. The fourth and last tribe consists of two genera :— Boops, with the mouth small, and the external teeth trenchant. There are several species in the Mediterranean, silvery or steel-coloured, with longitudinal golden stripes. Oblada, with small crowded teeth behind the trenchant ones; silvery, with blackish stripes, and a broad black spot on each side of the tail. THE FIFTH FAMILY OF THE ACANTHOPTERYGII. MENID. These differ from the last in the great extensibility of the upper jaw, which is advanced or withdrawn by means of long intermaxillary pedicles. It contains only the following four genera :— Mena, with fine narrow teeth in the jaws, and a band of the same on the vomer ; body shaped like that of a Herring, lead-coloured on the back, silvery on the belly. Smaris, want the teeth on the vomer, and the body is less elevated. Casio, has the dorsal somewhat higher. Geres, mouth protractile, jaw descends in advancing, and teeth in the jaws only: much esteemed for food. The first two genera inhabit the Mediterranean, the third the Indian Ocean, and the fourth the Atlantic, whence a stray individual sometimes reaches the coast of England. THE SIXTH FAMILY OF THE ACANTHOPTERYGII. SQUAMIPENNES (Scaly-finned). These fishes are so designated because the soft, and often the spinous parts, of their dorsal fins are so covered with scales as not to be easily distinguished from the rest of their bodies. This is the most distinguishing character; but they also have, in general, the body much compressed, and the intestines long, and with numerous ceeca. Linnzus included all those known in his time in the genus Cheéodon, or bristle-teeth, from the thinness and close array of these parts; but this genus admits of subdivision, and there are some others. The Chetodons have their teeth like a brush, their mouth small, their dorsal and anal fins scaly like the body, so that it is difficult to say where the fin commences. They abound in the seas of warm 298 PISCES. climates, and are remarkable for the beauty of their colours. Their intestines are long, with numerous cceca, and their air-bladders are large and strong. They frequent rocky shores, and are eaten. The following are the genera :— == Chetodon, properly so called, with the body more or less elliptical, the spinous and soft rays continued in a uniform curve, the snout pro- jecting more or less, and sometimes a small dentation on the operculum. They all resemble each other, even in their colours, being marked with a black band which passes over the eye. In some, there are several vertical bands; others have them longitudinal, or oblique; some have brown spots on the flanks; some have glossed bands on the vertical fins, and one or two ocellated spots. Some of them are also distin- guished by filaments produced from the soft rays of the dorsal, and others have very few spines in that fin. Chelmon, remarkable for the length of its snout, with the mouth small, and at the extremity, and the teeth fine like hairs. One species, C. rostratus, has the faculty of shooting insects with drops of water pro- jected from the mouth, and it seizes them as they fall. It is found near the shores of South-eastern Asia. Heniochus, Coachman, have the first spines of the dorsal, and particu- larly the third and fourth, extended into filaments like a whip, and often twice the length of the body. Ephippus, Horseman, with a deep notch between the spinous and soft portions of the dorsal, the first of which has no scales, and can be folded into a groove on the back. There are various species, some of the American and some of the Indian seas; and one species is said to be a very foul feeder. Many of this genus are found fossil in Mount Bolca in Italy, which is a vast magazine of petrified fishes. Holocanthus, have a strong spine on the operculum, with the edge of that toothed. They are found in the warm latitudes of both oceans. ‘Their flesh is excellent, and the colours beautiful. and regularly marked. Pomacanthus, have the body more elevated from a sudden rise of the edge of the dorsal. They are only known as American. Platax, has trenchant teeth, with three points in front of their brush-like ones, and their body strongly com- pressed, and continued into thick, elevated, and scaly fins, with a few concealed spines in the anterior edge, so that the height is much greater than the length. They inhabit the Indian Ocean, but a fossil species has been found at Bulca. Psettus, resembles Platax, but has all the teeth small and crowded; and the ventrals, which are very long in that, reduced to a small spine, without soft rays. They are of various forms, and known only as inhabitants of the Indian Ocean. Pimelepterus, with a single row of teeth placed on a horizontal base or heel, and trenchant in the antericr part. The body is oblong, the head blunt, and the fins thickened with scales, whence the name. They inhabit both oceans. Dipterodon, an analogous genus, with trenchant teeth, chisel-shaped, and the spinous and soft parts of the dorsal separated by a deep notch. Found in the Southern Ocean. Fig. 133 .-—Chietodon rostratus. The following genera, which are ranged with Chetodon, on account of their scaly fins, yet differ from them in having teeth on the vomer and palate :— Brama, Ray’s Bream, has the body deep and compressed, the profile almost vertical, one elongated dorsal fin, scales on the dorsal and anal, and slender curved teeth on the jaws and bones of the palate. It is found in the warmer seas, but is occasionally met with on the shores of England. Pempheris, has a long and scaly anal, the dorsal short and elevated, and an obtuse profile and large eye; a-small spine on the gill-lid, and small crowded teeth on the jaws, vomer, and palate. Inhabits the Indian seas. Toxotes, the Archer, has the body short and compressed, the dorsal far backwards, the snout short and de- pressed, and the lower jaw projecting beyond the upper one. It has small teeth crowded in all parts of the mouth, and the gill-lids finely toothed. It hits insects with drops of water at the height of three or four feet above the surface, and is remarkably sure of its aim. THE SEVENTH FAMILY OF THE ACANTHOPTERYGII. Scomperip& (the Macxerer Family) This family comprises a vast number of genera, many species, and countless individuals. They are eminently useful to Man, and are the object of some of the most extensive fisheries. Many of them were included by Linnzus in one genus, Scoméer, but they are subdivided as follows :— Scomber, the Mackerel, with the body spindle-shaped, beautifully coloured, smooth, and with small scales. The common Mackerel is well known as one of the most valuable of the fast-swimming surface ACANTHOPTERYGII 299 fishes, for the rapidity with which it dies when out of the water, and also becomes putrid, or tainted. There are several species in the European and American seas. Thynnus, the Tunny, has a soft corselet of large scales on the thorax, a cartilaginous keel between the crests and the sides of the tail, and the first dorsal approaching the second. It is very abundant in the Mediterranean, where it sometimes attains the length of fifteen or eighteen feet. It is captured in vast numbers, and forms an essential article of the food of the people. It has been known in the Mediterranean from the remotest antiquity, and occasionally appears on the British coast. There are several species, of which the Bonito, or Striped Tunny, is one of the most striking. Oreynus, has the pectoral fins much longer than the Tunny, the back blackish, the belly silvery, and the flesh much whiter than that of the Tunny. In summer, it visits the Mediterranean and Bay of Biscay, in shoals. [Most of the Scomberide frequent the shores in summer, for the purpose of depositing their spawn; and they subsist, in great part, upon the fry of the later spawners, as these again live upon theirs, which is a beautiful adaptation, whereby the immense surplus of one family of fish adequately supplies the wants of another. ] Auxis, have the corslet and short pectorals of the Cunny, and the separate dorsals of the Mackerel. Found in the Mediterranean. Of a fine biue on the back, with oblique blackish lines, and the flesh deep red. A West Indian species equals the Tunny in size. Sarda, differ from the Tunnies in having the teeth separate, strong, and pointed. The only known species in- habits both oceans, and is common in the Black Sea and Mediterranean. Cybium, have the body long, no corselet, jaw-teeth large and lancet-shaped, parietal teeth small, short, and crowded. Found in the warm parts of both oceans; and some of the species grow very large. Thyrsites, has the front teeth longer than the others, pointed teeth on the palate, and no lateral keels to the tail. Gempylus, have jaw-teeth similar to the last, but no parietal teeth, and the ventral fins scarcely perceptible. [These are the subgenera of Scomber, and the remaining Scomberide have characters somewhat different. ] Xiphias, the Sword-fishes, resemble the Tunnies in their very minute scales, the keels in their tails, the power of their caudal fin, and their whole internal organization. Their distinguishing characteristic is a long pointed beak, formed like a sword or spit, which terminates their upper jaw, and is a most powerful offensive weapon, with which they attack the largest animals in the ocean, [and sometimes drive it into the timbers of ships, where it breaks, and a portion is left]. This beak is principally composed of the vomer and the intermaxillaries, and supported at its base by the ethmoid and the frontal maxil- laries. Their gills are not divided like the teeth of a comb, but each consists of two large and parallel laminz, with reticulated surfaces. They swim with extreme rapidity, [and it is probable that the peculiar gills enable them to do this with safety, not being liable to get entangled like those in threads]. Their flesh is excellent. The subgenera are,— NXiphias, the Sword-fish, properly so called; has the beak long, flattened horizontally, and trenchant, like the blade of a large sword; sides of the tail with strong keels; only one dorsal, which wears in the middle in old speci- mens, and then seems two. This is one of the largest and best fishes in the European seas, and is frequently fifteen feet long. It is very abundant in the Mediterranean, but less so in the Atlantic. Notwithstanding its formidable weapon, its great strength, and its almost incredible celerity, a small crustaceous animal penetrates the flesh of the Sword-fish, and sometimes so torments it that it dashes itself on the shore with mortal violence. Tetrapturus. Beak shaped like a stiletto; each ventral conSists of one jointless blade; two small crests on each side of the base of the caudal, as in the Mackerel. [These lateral crests on the tail appear to steady that powerful organ, and thus render it more efficient and unerring in its intense labour.] One species inhabits the Mediterranean. Makaira, like the former, but wants the ventral plates; rather a doubtful species. Tstiophorus, has the beak and caudal crests like Tetrapturus, but the dorsal high, and serving as a sail in swimming; and the long and slender ventrals are composed of two rays each. Several species have been named, but they are imperfectly known. All the Sword- fishes attain a large size, [and the dorsal fin is subject to variations]. Fig 134 .—Xiphias clodius. Centronotus, a genus having free. spines in- stead of the first part of the dorsal, and ventrals in all the species. The subgenera are,— Naucrates, the Pilot-fish, has spindle-shaped body, free dorsal spines, keel on the tail as in the Herring, and two free spines before the anal. The Common 300 PISCES. Pilot-fish of the Mediterranean is not above a foot long ; but it is swift and voracious, and follows in the wake of ships along with the Shark, which it has been erroneously supposed to lead, and hence its name of Ductor. A black species of the South American coasts has been found eight or nine feet long. Eclacates, form and dorsal spines like the last, but the head flattened, and the keel and anal spines wanting. Lichia, has dorsal and anal spines on the back, one of the former lying flat and directed forwards, but the body is compressed, and no keels on the tail. There are several species in the Mediterranean, all eatable, and some of large size. Trachinotus merely has the body a little more elevated, and the dorsal and anal longer and more pointed. Rhynchobdella. Spines as in the former genus, long body, and no ventrals. The subgenera are,— Macrognathus: has a pointed, cartilaginous muzzle, projecting beyond the lower jaw, and the dorsal and anal separate from the caudal. Mestacembelus: jaws equal, aud dorsal and anal joined to the caudal. Both inhabit the fresh waters of Asia, and feed on worms, in search of which they plough up the sand with their cartilaginous noses : their flesh is much esteemed. This is the place for the imperfectly known genus Notacanthus, which has the muzzle of the last, free spines for a dorsal, ventrals abdominal, a long anal reaching to the top of the tail, and joining a very small caudal. The known species inhabit the Arctic Ocean, and have been found two feet and a half long. Seriola. This genus resembles Lichia, has a horizontal spine before the dorsal, but the dorsal spines united by a fin, a small fin with two spines before the anal, and no keel ou the lateral line. One species is the Milk-fish of Pondicherry, so much esteemed for the delicacy of its flesh. There are several other species in both oceans. Nomeus, resemble the last, but have large ventrals attached to the abdomen by their inner edge; colour, silvery, with transverse black bands on the upper part. Has been confounded with the Gobies. Temnodon: tail unarmed, spines or small fins before the anal, first dorsal small, second and anal small, scales, one row of trenchant teeth in each jaw, with small crowded ones behind, and on the vomer, the parietals, and tongue; seven rays on the gills, and the gill-lid forked. There are species common to both oceans, and about the size of the common Mackerel. Caranx, have the lateral line with scaly plates, keeled, and often spinous, hoiizontal spine before the first of the two dorsals, last rays of the second dorsal often detached, some spines or a small fin before the anal. Several species in the European seas, and generally over the globe. Resemble Mackerel, and are called Bastard Mackerel. [On the British shores they are designated Scad or Horse Mackerel, and they sometimes make their appearance in immense shoals, literally ‘‘ banking the sea,’’ especially along the Cornish coasts, and shores of the Bristol Channel. They feed on the fry of Herrings, and are not in much estimation as food. ] Vomer. This genus have the body more and more compressed and elevated in the different sub- genera, while the armature on the lateral line diminishes, and the skin becomes smooth like satin, without any apparent scales. They have no teeth, except short and fine ones crowded together; and the subgenera are chiefly distinguished from each other by various filamentary prolongations of sonie of the fins. Linnzus and Bloch included them, but improperly, in the genus Zeus (Dory). The fol- lowing are the subgenera :-— Olistus. These resemble Situle, a subgenus of Caranx, but the middle rays of the second dorsal are not branched, but merely articulated, and extend in long filaments. Scyris. Nearly the same in form and filaments, but the spines of the fir t dorsal hidden in the edge of the second, and the ventrals short. Blepharis, has long filaments to the second dorsal and anal, the ventrals very long, and the spine scarcely above the skin; their body is very elevated, but their profile not so vertical as that of some of the other subgenera found in the warm seas; and in the West Indies one species is called the ‘‘ Cobbler.” Gallus, similar to the last in all respects except having the profile more vertical. Argyreiosus, has the profile still more vertical, the first dorsal defi- nitely formed, and some of its rays extended in filaments, as well as those of the second dorsal; the ventrals are also very long. Vomer, properly so called, has the body com- pressed, and the profile vertical, as in the two sub- wenera immediately preceding it, but none of the fins are extended into filaments. Zeus. After removing the analogous sub- Hus a95Blegeen genera of Vomer, this genus comprehends ACANTHOPTERYGII. 301 fishes with the mouth greatly projectile, and few and weak teeth. They differ much, and require division into various subgenera. Zeus, the Dory, has the first dorsal deeply notched between the spines, and the intermediate membranes extend into long filaments, together with the forked spines along the bases of the dorsals and the anal. One species, the Common Dory (John Dory) is yel- lowish brown, with golden or silvery reflections, according to the position of the light, with a round black spot margined with white on the shoulder. [The Dory has been a renowned fish since the days of the ancients, who styled it not the fish of Jove, but Zeus, that is, Jove himself. The religious also claimed it as the “ Tribute-money-fish,”’ from the black marks of the thumb and fingers of St. Peter on the shoulders, in which it is the rival of the Haddock—neither of which fishes Peter had any chance of seeing. It is still held in great estimation by epicures; and being a ground fish, it keeps two or three days, and is all the Fig. 137.—The Dory. better for it.] Capras, the Boar-fish, has the notched dorsal of the Dory, but no spines along the dorsal or anal; it has the mouth still more projectile than the Dory, the body covered with rough scales, and the fins entirely with- out filaments. [Its flesh in little esteem. ] Lampris, has a single dorsal very high anteriorly, as also is the anal, which has one small spine before its base; sides of the tail with keels; ventrals and caudal lobes very long, but subject to be worn away; colour, violet, spotted with white, and the fins red. Inhabits the Arctic seas, and grows to a large size. {In Britain it is known as the Opah, or King-fish.] Equula, One dorsal with several spines, the fore- most occasionally long, snout much protracted, * body compressed, and edges of the back and belly toothed with fins. They are small fishes, several of which inhabit the Indian Ocean, and some of them have the power of contracting the snout when at rest, and projecting it suddenly for the capture of those small fishes on which they feed. Menas, has the snout as in the last, but the body more compressed, the abdomen trenchant and very convex, but the back nearly straight; the ventrals are behind the pectorals, but still attached to the shoulder. One only is known, of the Indian Ocean, silvery, with a black spot near the back. Stromateus. This genus has the same compressed form as Zeus, and the same smooth epidermis; but the muzzle is blunt, and not protractile. It has a single dorsal, with a few concealed spines anteriorly, but no ventrals, The vertical fins are thickened as in the scaly-finned fishes ; the gullet has a number of spines attached to the membrane. They are found in the Mediterranean, the Indian Ocean, and Pacific. Some of the species differ a good deal in form. Peprilus, has the pelvis trenchant and pointed before the vent, resembling rudimental ventrals, and some species have this part toothed. Luvarus, resembles the former, but has no trenchant blade on the pelvis, only a small scale, which covers the vent, and a prominent keel on each side of the tafl. A large species, silvery, with a reddish back, is found in the European seas. Seserinus. All the characters of the last genus, save that there are little rudiments of ventrals. One small species is known in the Mediterranean. Kurtus, resemble Peprilus, but differ in having the dorsal shorter, and the ventrals larger; the anal is long, and the scales so minute as to be invisible till the skin is dried. They have seven gill-rays, a spine between the ventrals, and some small trenchant plates before the dorsal, which has a spine directed forward at its base. The ribs are dilated, convex, and form a continuous annular tube, which extends so far under the tail, and contains the air-bladder. Some have a little cartilaginous horn in advance of the plates before the dorsal. They are found in the Indian seas. Coryphena, Dorades, or Gold-fishes, the Dolphins of the ancients, and of the modern Hollanders. They have the body long, compressed, and covered with small scales; the head trenchant in the upper Fig. 138,—The Boar-fish. 302 PISCES. ) part; a single dorsal, which extends the whole length of the back, with flexible rays the whole length, but the anterior ones not jointed; and they have seven rays in the gills. The following are the sub- genera :— Coryphena, the Coryphene, properly so called, have the head much elevated; the profile curved, and descending rapidly ; they have teeth in the palate, as well as the jaws. They are large and splendidly-coloured fishes, cele- brated for the velocity of their motions, and the havoc which they commit among the Flying Fishes. [C. hipparis, the Common Coryphene, is found in the Mediterranean and Atlantic. It is a brilliant fish, and drives through the water like a radiant meteor. Its long dorsal is sky-blue, with the rays gold-coloured; its tail-fin green; its back green, mottled with orange; and its belly silvery, divided from the former by a yellow lateral line. As it passes along, however, there is an extraordinary play of colours upon it; and it is one of the fishes with the changes of whose colours, when dying, the luxurious Romans used to gloat their depraved fancy. Some of the Indian species are brighter coloured than this one; and, indeed, all the Scomberide have a tendency to get blackish in the cold seas, and brilliant in the warm ones, owing to the greater effect of the solar light in the latter; for the sunbeam is Nature’s pencil, down even to the deepest fish or pear] shell]. Curanxamores, differ from Coryphene in having the head oblong, and less elevated, and the eye in a medium position. Centrolophes, has no teeth in the palate, and a plain space between the occiput and the dorsal. [One species, the Black Fish, C. pompilius, occasionally wanders from the Mediterranean to the southern shores of Britain. It is a powerful fish, and not easily caught, but its flesh is much esteemed. It feeds partially on some sea-weeds, but chiefly on other fishes. ] Astrodermus, has the head and dorsal like the Coryphene, but the mouth small, four rays in the gills, and the ventrals very small in the throat. The scales are thinly scattered over the body, arranged into stars, hence the name. Only one species is known, which inhabits the Mediterranean ; is silvery, spotted with black, and has a very long dorsal. The fins are red. Pteraclis, teeth and head like the Coryphene, but the scales larger; ventrals on the throat small; dorsal and anals as high as the fish. {Such are the leading genera and subgenera of the Mackerel family, one of the most numerous and splendid in the class. ] THE EIGHTH FAMILY OF THE ACANTHOPTERYGII. Tanip# (Ribbon-shaped). This family is closely allied to the Mackerels, its first genus agreeing intimately with the last sub- genera of Scomber. The fishes composing it are long, flattened on the sides, and have very small scales. One tribe has the muzzle elongated, the mouth deeply cleft, with strong trenchant teeth, and the lower jaw projecting beyond the upper. This tribe contains only two genera. Lepidopus, the Scabbard-fish, or Scale-foot—from the form of the ventrals, which are merely two scaly plates. The body is thin and elongated, with a dorsal above, and a low anal beneath, terminating in a well-formed caudal. The gills have eight rays; the stomach is long, with more than twenty cceca near the pyrolus ; and the air-bladder is long and slender, with a glandular body attached. One species, L. argyreus, occurs from England to Southern Africa, but is not plentiful. It is sometimes five feet long, but itis rare. [It swims with extreme rapidity, and often with the head above water. It has no scales on the body, except the two which occupy the place of the ventral fins.] Trichiurus, Hair-tail. The body, muzzled jaws, and teeth like the last, and a dorsal extending along the back; but no ventral, anal, or caudal fins, excepting a few obscure little spines on the under side of the tail, which terminates in a hair-like point; there are seven rays in the gills; the stomach is long and thick; the intestines striped with numerous coeca; and their air-bladder long and simple. Viewed laterally, they resemble beautiful silver ribbons. There are several species of the Indian Ocean, and one at least of the Atlantic. (One, 7. Lepturus, called by some the Blade-fish—in contrast, we suppose, to the Scabbard-fish—occurs occasionally in various parts of the British seas. It is shining silvery, with greyish-yellow fins; the dorsal mottled with black on the edge; the irides are golden]. Some of the Indian Trichiuri have been described as having electric or galvanic properties, but such is not the fact. A second tribe comprehends genera which have the mouth small, and little cleft. Gymnetrus, has the body elongated, and flat, without an anal fin, but with a long dorsal, a caudal composed of few rays, and ventrals under the pectorals, which are fibrous, with small expansions at their extremities, but both they and the anterior of the dorsal are liable to be broken. The fishes themselves are very tender, their bones soft, their fins easily rent, and their flesh soon decomposed. They occur in the Mediterranean, the Indian, the Atlantic, and the Arctic Seas. Some of them are ten feet in length. [Two species have occurred in the British seas :—G. Hawkensii, on the coast of Cornwall, and G. arcticus, on some of the northern coasts; but the last species is not very satisfactorily made out, as the tenderness of the fish causes it to be mutilated almost the in- stant it is stranded. ] Stylephorus, has a caudal fin, as in the last, but shorter ; and instead of the tail ending in a hook in the middle of the fin, as it does there, it is produced in a filament longer than the body. ACANTHOPTERYGII. 303 A third tribe has the muzzle snort, and the mouth cleft ooaquely. It contains three genera. Sepola, have a long dorsal and anal, the top of the cranium flattened, the gape inclining upwards, all the spines of the dorsal flexible, but those of the ventrals stiff, cavity and stomach very short, and the air-bladder extending as far as the tail. One species, of a reddish colour, inhabits the Mediterranean; [and is occasionally found on the south coast of England, where it is known as the Red-band Fish, or Red Snake-fish. They appear to have little command of themselves in a stormy sea]. JLophotes, head short, with an osseous crest surmounted by a spine, bordered behind this with a low fin, extending from this spine to the tail, which has a very smal] caudal; the anal very short, pectorals moderate, and scarcely any ventrals; teeth pointed, eyes very large, and abdominal cavity occupying nearly the whole length of the body. One species is known in the Mediterranean, where it attains a large size. THE NINTH FAMILY OF THE ACANTHOPTERYGII. TuHeEuTYEs (the Lancer-risu Family). These agree with the Mackerel family in some respects, but differ in others, such as trenchant spines on the sides of the tail, and an horizontal spine before the dorsal. The family contains few genera, all foreigners, with compressed oblong body, small mouth, slightly or not at all protractile, and only a single row of trenchant teeth in the jaws. They feed chiefly on fuci and other marine plants, and have large intestines. [Their powerful spines, which they use very dexterously, are weapons of defence supplied to them for nearly the same purposes as the horns of the ruminant Mammalia. | Siganus, have a unique character in their ventrals, which have two spinous rays, one external and the other internal, and three branch rays between them. They have five gill-rays, a horizontal spine before the dorsal, and the styloid bones of the shoulder so curved as to unite at their extremities with the first interspiral bone of the anal. There are numerous species in the Indian Ocean. Acanthurus, Lancet-fishes, have the teeth trenchant and notched, and a strong spine at each side of the tail, as sharp as a lancet, with which they inflict severe wounds on such as attempt to handle them unwarily; hence their common name. They are found in the warm parts of both oceans: some with the dorsal very elevated, others with a tuft of bristles before the lateral spine, and others again with the teeth divided like a comb. Prionurus, differ from the last only in having a number of horizontal cutting-blades on the side of the tail, in place of the strong spine. [These might be termed Scarifiers.] Naseus, have trenchant blades in the tail like the last, but with conical teeth, and a prominent horn projecting over the muzzle; only four rays in the gills, and three in the ventrals. Their skin is leathery. Axinurus, more elongated than the last, and without the prominence in front, but with the same number of rays in the gills and ventrals ; on each side of the tail, they have a single square cutting-blade, without a basal shield; their mouths are small, and their teeth slender. Priodon, have the notched teeth of Acanthurus, the three soft ventral rays of Naseus, and the sides of the tail armed like Syganus. THE TENTH FAMILY OF THE ACANTHOPTERYGII. FIsHES WITH LABYRINTHS IN THE PHARYNX. By the term Pharyngine labyrinthiforme, is meant that the upper membranes of the pharynx are divided into small irregular leaves, more or less numerous in the different genera, containing cells between them, which the fish can at pleasure fill with water; and by ejecting a portion of this water, moisten its gills, and thus continue its circulation while out of its proper element. [From this con- trivance of Nature herself, we are to understand that, if the gills of a fish can be kept properly moistened, by salt water or by fresh, according as the fish is naturally an inhabitant of one or the other, it may be carried alive over land to an indefinite distance]. By means of this apparatus, these fishes are enabled to quit the pool or rivulet which constitutes their usual element, and move to a considerable distance over land. This singular faculty was unknown to the ancients; and the people in India still believe that these fishes fall from heaven. [In cold and temperate climates, this apparatus is not necessary, because all the ponds and streams there, which are capable of supporting fish, are perennial, and never dried up, except in seasons of extreme drought, when, of course, all the fishes perish ; but in tropical countries, and in India perhaps above all other tropical countries, where the seasons are alternate drought and rain, there is neither food nor water for a fish during the one season, and plenty of both during the other. Hence, these fishes are furnished with this peculiar apparatus in the pharynx, by means of which they are enabled to follow the water over dry obstacles, and, in some of the species, to climb steep banks, or even trees, in the course of their instinctive journeys]. The following are the genera :— 304 PISCES. Anabas, the Climbing Perch of India. This genus has the labyrinths highly complicated; the third pharyngi have pavement teeth, and there are others behind the cranium; the body is round in the section, and covered with strong scales; the head is large, the muzzle short and blunt, and the mouth small; their lateral line is interrupted for the posterior third ; the margins of the operculum, super-operculum, and inter- m Operculum, are strongly toothed, but there are y no teeth in the pre-operculum; their gills have five rays; they have many spinous rays in the dorsal and anal; and their stomach is of middle size, rounded, and with three ccecular appendages to the pyrolus. Only one species is known, which not only quits the water, and moves over banks, but is said by Daldorf to climb bushes and trees, by means of its dorsals and the spines on the gill-lids; but others dispute the latter power. This species is very common in India. Polyacanthus, has the spinous rays as numerous as the last genus, or even more so; and the same mouth, scales, and interrupted lateral line, but the gill-lid is not toothed; the body is compressed ; there are four rays in the gills, a narrow band of small crowded teeth in the jaws, but no palatal teeth; the labyrinths are less complicated, and the pyrolus has only two ccecular appendages. Macropodus, differs from the last in having the dorsal less extended, and that in the caudal and ventral ending in slender points ; the anal is also larger than the dorsal. Hesostoma, have a small compressed mouth, so protractile as to advance from and retreat to the suborbitals ; they have small teeth on the lips, and some on the jaws of the palate; five gill-rays, on the arches of which, to- wards the mouth, there are lamelle resembling the external ones ; the stomach is small, and has only two pyrolic ceca, but their intestine is long; the air-bladder is very stout. Osphromanus (so called from a conjecture, apparently erroneous, that the labyrinths of the pharynx are organs of smell], resembles Polyacanthus, but has the forehead concave; the anal longer than the dorsal; the suborbitals, and inferior edge of the pre-operculum, finely toothed ; the first soft ray of the ventrals very long; six gill-rays; the body much compressed. One species, O. alfax, grows as large as a turbot, and is considered more delicious. It has been introduced into ponds in the Isle of France and Cayenne, where it thrives well. The female, as in many other species of fish, digs a cavity in the sand for the reception of her eggs. Trichopodus, has the forehead more convex than the last, a shorter dorsal, and only four gill-rays. The only known species is a small fish from the Oriental Isles, of a brownish colour, with a dark spot on the side. Spirobranchus, resembles Anabas, but has no teeth on the gill-lids, but teeth in the palate. The only known species is a minute fish of Southern Africa. Ophicephatus, like the rest of the family in most of its characters, especially in the pharyngeal labyrinth, and can creep for some distance over land; but it differs from all other Acanthopterygii in having no spines in the fins, except a short one on the first of the ventrals. The body is long, and nearly cylindrical; the head flat, and covered with polygonal plates; the dorsal extends nearly the whole length; the anal is also long, and the caudal round it; they have five gill-rays; the stomach is obtuse, with moderately long cceca; and the abdominal cavity extends nearly to the base of the caudal. They are found in India and China, of various species, and different sizes. In the former country, the jugglers, and even the children, amuse themselves by making it craw] along upon dry ground; and in China, the larger ones are cut up alive for sale in the markets. {All the genera and species of this family are fresh-water fishes ; and they have not hitherto been found except in the south-east of Asia and the adjacent islands, and in Southern Africa.] Fig. 139 —Anabas. THE ELEVENTH FAMILY OF THE ACANTHOPTERYGII. Mueiip& (the Muter Family). This family consists of the following three genera :— Mugil, the Mullet, properly so called, [which must not, however, be confounded with the Red Mullets, either plain or striped, which are included in the Perch family]. Their organization has so many peculiarities that they might be formed into a separate family. Their body is nearly cylindrical, covered with large scales, two separate dorsals with only four spinous rays in the first, and the ventrals are a little in rear of the pectorals. Their head is a little depressed, covered with large angular scaly plates ; their muzzle is short; their form isan angle, in consequence of a prominence at the middle of the lower jaw; and their teeth are very small, and in some almost imperceptible. They have six gill-rays ; the bones of the pharynx give an angular form to the gullet; their stomach terminates in a fleshy gizzard, resembling that of a bird; they have few cecal appendages, but the intestinal canal is long and doubled. They are gregarious, resorting to the mouths of rivers in large troops, and con- stantly leaping up out of the water. [They feed in part upon small Crabs and other Crustacea, which ee ee CANTHOPTERYGII. they swallow entire]. There are several species found in the European seas, of which the flesh is much esteemed. M. cephalus, the Grey Mullet, has the eyes half covered by two adipose membranes, adhering to the anterior and posterior margins of the orbit ; when the mouth is closed the maxillary is completely hidden under the suborbital ; the base of the pectoral has a long crest with a keel; the nostrils are separated by a considerable space, and the teeth are a little prominent. It is the largest and best of the Mediterranean species. [It occurs also on the British shore, though, perhaps, not so frequently as another species, the Thick-lipped Grey Mullet, M. chelo. The two are, however, sometimes confounded with each other. In addition to these, there is another Grey Mullet, first described by Mr. Yarrell, and which, from its shortness in proportion to the length, he has called. M. curtus. With the exception of its form, its small size, and some difference in the rays of the pectoral, anal, and caudal fins, it bears considerable resemblance to I. cephalus.] M. capito, the Ramando of Nice, has the maxillary visible behind the commissure of the jaws, even when the mouth is shut ; its teeth are much weaker: its nasal openings nearer to each other; and the membrane of the eye does not cover any part of the ball. The scale before the pectoral is short and blunt, and there is a black spot at the base of that fin. Two much smaller species (M. aureus and M. saltator of Risso) resemble M. camhiok The first has the maxillaries under the suborbitals, like Cephalus, but the nostrils are near each other, as in Capito. Thesecond, with the cha- racters of Capito, have the suborbital notched, showing the maxillary. M. chelo, is common in the Mediterranean and the Atlantic. It is easily distinguished by its thick fleshy lips, by their ciliated edges, and by the teeth which penetrate their substance like hairs. The maxillary is curved, and appears behind the commissure. MM. /abio, a small American species, has proportionally larger lips, with their margins curved. There are also some thick-lipped species in the Indian seas. [There seems little doubt that Chelo is the Grey Mullet, which is so frequently taken in the bays and estuaries on the Channel coast, although not the one generally described as such]. Tetragonurus, is so named from the projecting keels or ridges on each side, near the base of the caudal. It is also one of those insulated genera which indicate particular families, [rather than belong to any of those esta- blished ones]. They in part resemble the Mullets, and in part the Mackerels. Their body is elongated; their spine is dorsal, long, but very low; their soft dorsal, which approaches the other, higher and shorter; their anal is opposite the soft dorsal, and their ventrals a little behind the pectorals; the sides of the lower jaw are raised vertically, and furnished with a single row of trenchant teeth like a saw, and inclosed, when the mouth is shut, by the upper teeth; there is also a small range of teeth upon each parietal bone, and two on the vomer ; the gullet is furnished internally with hard and pointed papillz ; their stomach is fleshy, and doubled; their coeca numerous, and their intestinal canal long. Only one species is known, an inhabitant of the Mediterranean, about a foot long, and black: its flesh is believed to be poisonous. Atherina, is a genus which does not completely harmonize with any other, and therefore it is arranged between the Mullets and the Gobies. It has a lengthened body, two dorsals far apart, ventrals behind the pectorals, the mouth protractile, and furnished with very small teeth. All the known species have a broad silvery band along each flank. They have six gill-rays; their stomach is a cul-de-sac, and no ceecular appendages. The last trans- verse process of the dorsal vertebre are bent, forming a sort of conical receptacle for the end of the air-bladder. They are small fishes, much esteemed for the delicacy of their flesh; and the fry remain a long time in shoals along the shores, and are consumed in great numbers. Four species are found in the Mediterranean, and there are a good many foreign ones. [4. presbyter, is found on the south coast of England, and also on the east coast as far as Lincolnshire, and in the Firth of Forth, but not abundantly. On the coasts of Hampshire and Sussex it is plentiful; and on the Cornish coast it is taken at all seasons. It is a handsome little fish, about six inches long, known as the Sand Smelt, but inferior in flavour to the true Smelt. ] THE TWELFTH FAMILY OF THE ACANTHOPTERYGII. Gopiop® (the Gosy Family). The fishes of this fetnlly 3 are known by the thinness and flexibility of their dorsal spines. They all ———— ———————— have the same kind of viscera,—namely, a long, uniform, intestinal canal, without cceca, and no air-bladder. -[The family contains several genera, some of which admit of subdivision]. Blennius. The Blennies have one well-marked character in their ventral fins, inserted before the pectorals, and having only two rays each. The stomach is slender, with no cul-de-sac; the = intestine large, without cceca, and there is no air-bladder. The form is elongated and com- pressed, and there is but one dorsal, composed almost entirely of jointless but flexible rays, x Fig. 140.—Blennius. 306 PISCES. They live in small troops, among rocks near the coast, swimming and leaping, and can exist for some time without water. Their skin is covered with a mucous secretion, whence they have their common name Blennies. Many of them are viviparous, or bring forth their young alive, fully formed, and capable of subsisting by themselves. They are divided as follows :— Blennies, properly so called, have the teeth equal and closely set, forming only a single and regular row in each jaw, but terminating behind, in some of the species, by a longer and crooked tooth; their head is blunt, their profile vertical, and their muzzle short. Most of them have a fringed appendage over each eye, and some have another on each temple. Their intestines are wide and short. The following are some of the more remarkable species :—B. ocellaris, Ocellated Blenny, or Butterfly-fish. This has two lobes in the dorsal, the first marked with around black spot surrounded by a white ring, and then a black one. It is a native of the Mediterranean, (but is occasionally found in the South of England by dredging. It lives among the rocks and sea-weed, and is under- stood to feed on minute Crustacea and Mollusca. It spawnsin spring. It is avery small fish.] B. tentacularis has four filaments on the head, the dorsal fin even, and a black spot on the fourth and fifth rays. [It is not named among the English Blennies.] B. gattorugine, has the dorsal nearly even, and only two fillets on the head. [It is found on the Cornish shores, varying in length from one inch to five. The general colour is reddish-brown, paler on the belly.] B. palmicornis, has the appendage over the eye fringed, and the dorsal almost quite even, the anal Jong, and the caudal rounded: [it is found on yarious parts of the British shores, and even as far north as Norway. It is usually of small size, and pale brown, mottled with dark dull brown]. In some the appendages over the eyes are hardly visible, but they carry a prominent membrane on the top of the head, which becomes red and inflated in the pairing season. Of these there are several in the European seas. B. galerita. [Head blunt and rounded, body smooth, compressed, and clammy, one long dorsal fin, ventrals before the pectorals, with only two rays each, and both joined at the base. This is an insignificant species, found occasionally on the British shores, but, like most of the genus, quite valueless.] B. rubiceps, has the first three rays of the dorsal elevated, with red points, and the top of the head of the same colour. B. pholis, has the head without any appendages, the dorsal notched, and the pectorals rather large. [It is found on the British shores, and is remarkably tenacious of life, being capable of living a good many days if kept in moist grass or moss: like the rest, it is of trifling value. ] The following subgenera are separated from the Blennies, properly so called :— Myxodes, with the head lengthened, the muzzle pointed, and projected in advance of the mouth; a single row of teeth, but no large or canine ones. Salarias, have the teeth in a single row, placed close, hooked, but very slender and numerous. In a recent specimen they yield to the touch like the keys of a musical instrument. The head is much compressed above, and enlarged transversely below; their lips are fleshy and thick; their profile is quite vertical. Their intestines have spiral convolutions, and are longer and more slender than in the Common Blenny. They are found in the Indian Ocean only. Clinus, have short pointed teeth, dispersed in several rows ; their muzzle is less obtuse than in the former ; the stomach is more ample, and the intestines shorter. There are some variations of character. Cirrhibarba, resembles Clinus in shape, has small curved teeth, a little filament over the eye, one in the nostril, three larger ones at the end of the muzzle, and eight under the point of the lower jaw. Found in India. Murenidides, the Spotted Gunnel, or Butter-fish, has the ventral smaller than in any of the rest, often only a single ray; head small; body lengthened like a sword-blade ; a low dorsal, extending the whole length of the back; teeth like Clinus; and the stomach and intestine have a uniform appearance. [Found generally in the European seas, even as far north as Greenland, where it is eaten. ‘There it is said to grow to the length of ten inches, but on the British shores it is seldom more than six. The mucous secretion of the skin is very copious. | Opistognathus, resembles the true Blennies in form, especially its short snout ; has large maxillaries prolonged backwards to a sort of moustache ; teeth rasp-like, the external row strongest ; three rays in the ventrals, which are directly under the pectorals. From the Indian Ocean. Zoarcus. These cannot be separated from the Blennies, though they have no spinal ray, for they have all the more essential characters; [one species, Z. viviparens, is very common on the British shores, especially the north and east ; it is easily taken about the season when charlock is in flower in the corn-fields ; but it is of little value, and generally disliked, because when boiled its bones turn green. It attains the length of seven or eight inches, and the female brings forth her young alive. The body is heavy and lumbering, for so smalla fish. Z. labrosus is an American species, of an olive colour, with brown spots, and it sometimes attains the length of three feet. ] Anarrichas. [So very similar did Cuvier consider these fish to the Blennies, that he was disposed to consider them as Blennies without ventral fins.] Their dor- sal fin is composed entirely of simple but not stiff rays, and extends, as does also the anal, very close to the base of the caudal, which last, as well as the pectorals, is rounded The whoie body is soft and slimy. Their parietal bones, vomer, and man- dibles, are hard, with stout bony tubercles, sur- Fig. 741. Annerichas lus. mounted by small enamel teeth; but their front teeth are much larger and conical. This structure of the teeth gives them an armature, which, added to their large size, makes them both fierce and dangerous fishes. They have six rays in the gills; stomach short and fleshy, with the pyrolus near its base; the intestines short, wide, and without cceca ; and they have no air bladder. a eee ACANTHOPTERYGII. 307 A. lupus, the Sea Wolf, or Sea Cat, is the most common species: it inhabits the north seas, and is very often met with; attaining the length of six or seven feet. Its colour is brown, clouded with darker. Its flesh resembles that of an Hel. It is very valuable to the Icelanders, who salt its flesh for food, employ its skin as shagreen, and make use of its gall as soap. [This large and formidable species is almost exclusively confined to the northern seas, and in appearance it is a very repulsive fish. Its body is thick and lumbering, while the form of the pectorals, the colours of the front, the proximate position of the eyes, and the great teeth, give it much the appearance of a Cat, or even of one of the more formidable animals of that family. Its manners accord with its aspect, for it is remarkably strong, very active, and equally ready to defend itself or attack an enemy. It often enters the fishermen’s nets for the purpose of plundering them of the entangled fish ; and when the fishermen attack it, and it cannot dart through the net, it fights like a Lion. They maul it with handspikes, spars, and such heavy timber as they may have in the boats ; but even when it is landed, and apparently dead, they are not quite safe from its bite. On the east coast of Scotland, it is a frequent though by no means a welcome visitor; and though those who can overcome their aversion to its appearance find it wholesome and light food, yet it is a fish which the majority would not receive gratis. It deposits its spawn in early summer, among the sea-weed, and is understood to prey indiscriminately upon Fishes, Crustacea, and shelled Mollusca, its jaws and teeth being capable of breaking the hardest shell. In the Arctic seas, which are its appropriate localities, it grows to a greater size than on the British shores. ] Gobius, the Gobies, or Sea Gudgeons, are easily recognized by the union of their ventrals, which are thoracic, and united either for their whole length, or at their bases, into a single hollow disc, more or less funnel-shaped. The rays of the dorsal are flexible, their gills have five rays only; and, like the Blennies, they have but little gill-opening: they can live for some time out of the water. Like the Blennies, also, their stomach has no cul-de-sac, and their intestines no ceca. In their reproduction they further resemble the Blennies; and some species, as in these, are known to be viviparous. They are small or middle-sized fishes, which live among rocks near the shore, and most of them have a simple air-bladder. They admit of division into the following subgenera :— Gobius, comprehending the Gobies, properly so called. They havethe ventrals united for the whole of their length, and also a transverse membrane joining their bases in front, so as to form the whole apparatus into a concave disc. The body is lengthened, the head moderate and rounded, the cheeks turgid, and the eyes near each other, and they have two dorsal fins, the last of which is very long. Several species inhabit the European seas, the characters oi which are not sufficiently ascertained. They prefer a clayey bottom, in which they excavate canals, and pass the winter in them. In spring they prepare a nest in some spot abounding with sea-weed, which they afterwards cover with the roots of Zostera (grass-wrack). Here the male remains shut up, and awaits the females, which successively arrive to deposit their eggs; and these he fecundates, and exhibits much solicitude and courage in defending them from enemies. The Goby is the Phycis of the ancients; according to Aristotle, “ the only fish that constructs a nest.” G. niger, the Black Goby, or Common Goby, is the one most frequent on European shores. [It is only about five or six inches long, and of scarcely any value, except as food for other fish. The margins of the united ventrals form almost a perfect oval, and there is a tubercle behind the vent, the use of which is conjectured, but not known. In the Mediterranean the species are much more numerous, have considerable variety of colour, and one, the Great Goby (G. capito) grows to the length of a foot or more. Other British ones are, the Two-spotted Goby, a small species with one dark spot under the base of thefirst dorsal, and another on the base of the caudal,—this is not above two or three inches long; the Spotted Goby, about three inches long, yellowish, with pale rust-coloured spots, very abundant in estuaries, or on shallow shores, and used by fishermen as bait; and the Slender Goby, similar to the preceding in colours and in length, but much more slender in the body. The habits of all are nearly » the same.] Other subgenera are,—Gobiodes, which differ from the Gobies in nothing but having one dorsal tin. Tenioides, more lengthened in the body; the lower jaw elongated, and rising over the upper one; tongue very fleshy; some cirri on the lower jaw; eyes extremely minute, and almost hidden. Periopthalmus: the entire head scaly ; eyes with a moveable underlid; the pectorals scaly for more than half their length, which gives them the appearance of having wrists. [Indeed, this species leads naturally to the structure and habits of the family next to be noticed]. Their gill-openings are still smaller in proportion than those of the Gobies; and they can live for a longer time out of the water. In the Molucca Islands, which they inhabit, they may be seen creeping and leaping over the mud, either to escape from enemies, or to seize upon the minute Crustacea which constitute their food. Eleotris, have, like the Gobies, flexible spines in the first dorsal, and an appendage behind the vent; but they have the ventral fins separate, and six gill-rays. They inhabit chiefly the fresh waters of warm countries, and lurk in the mud. One, E. dormatrix, the Sleeper, from the West Indian marshes, is tolerably large; and others have been found in Africa, in India, and in the Mediterranean. Callionymus, have two very striking characters: their gill-openings are only a hole on each side of the nape, and their ventrals are placed under the throat, separate, and larger than the pectorals. The head is oblong, de- pressed, and with the eyes directed upwards ; their intermaxillaries are very protractile, and their pre-operculi are lengthened backwards, and terminate in some spines; their teeth are small, and thickly set, and they have none in the palate. They are finely-coloured fishes, with the skin smooth ; the first dorsal supported by setaceous rays, - oD 308 PISCES. the first of which reaches backwards nearly to the tail; and the second dorsal and the anal have also the rays con- siderably elongated. They have neither cul-de-sac to the stomach, cceca, nor air-bladder. One species, C. lyra, the Dragonet, is common in the British Channel, [and not rare on many parts of the British coast, even as far north as the Orkneys. The prevailing colour is yellow, with spots of brownish yellow, whence some of the common names of the fish. It frequents the shallow waters, feeding on Crustacea, Mollusca, and Worms; and answering little purpose, save as food for more valuable fish. Its flesh is said, however, to be firm and good. C. dracunculus, the Sordid Dragonet, is more dingy in colour, and has the rays of the first dorsal much less produced. It was once supposed to be the female of the other species, but the mistake has been found out and rectified. There are some subgenera nearly allied to Callionymus.] Trichonotes, differs not much from the last, except in having the body very long, a single dorsal, and the anal proportionally longer. The first two rays of the dorsal are extended in long threads, representing the first dorsal of the former. It is said that the gill-openings of this subgenus are tolerably wide. Comephorus, have the first dorsal very low; the muzzle oblong, depressed, and broad; the gills with seven rays, and large openings; the pectorals very long; and (which distinguishes them from the rest of the family) they have no ventrals whatever. The known species is found in the fresh-water lake of Baikal. It is a foot in length, very soft and greasy in its substance, and pressed for obtaining an oil. It is not fished for in the lake, but found dead on the shores after storms, which are there severe and frequent. Chirus, are fishes with the body rather long, small ciliated scales, a small unarmed head, a shallow mouth, with small and irregular conical teeth. The spines of the dorsal are always slender, and that fin extends along the whoie back. Their distinguishing character is several series of pores, extending aleng the side, and haying some resemblance to additional lateral lines. All the known species inhabit the Sea of Kamtschatka. THE THIRTEENTH FAMILY OF THE ACANTHOPTERYGII. | PecToraALEs Pepuncutati (Fishes with Wrists to the Pectoral Fins). There are some spinous fishes in which the carpal bones are so elongated as to form a sort of arm or wrist, to the extremity of which the pectoral fin is articulated. The family consists of two genera, closely allied to each other, though authors have sometimes placed them far apart in their arrangements; and they are also related to the Gobies, [particularly to Periopthalmus, already noticed. This is a very peculiar structure of the fins; gives these fishes a strange appearance, and enables them, in some in- stances, to leap suddenly up in the water, and seize prey which they observe above them; and in others to leap over the mud, somewhat after the manner of Frogs. ] Lophius, Anglers.—The distinguishing character of these, besides their demi-cartilaginous skeleton, and their skin without scales, consists in the pectoral being supported as by two arms, each consisting of two bones, which may be compared to the radius and ulna of an arm, but which in reality belong to the carpus, or wrist; and in this genus they are larger than in any other. They are also characterized by having the ventrals placed much in advance of the pectorals; and by having the operculum and the gill-rays enveloped in the skin, so that the gill-opening is merely a hole situated behind the pectoral. They are voracious fishes, with a large stomach and a short intestine; and they can live a long time out of the water, in consequence of the small size of their gill-openings. They admit of division into three subgenera. Lophius, head excessively large compared to the body; very broad, depressed, and spinous in many parts; the mouth deeply cleft, and armed with pointed teeth; and the lower jaw fringed round with many fleshy barbules. They have two dorsal fins, and some rays of the first are free, and move on the bones of the head, where they rest on a horizontal interspinal process. [In the Angler, or Fishing Frog of the British seas, the motions of these de- tached rays are very peculiar. ‘Two are considerably in advance of the eyes, almost close to the upper lip; the posterior of these is articulated by a stirrup upon a ridge of the base, but the anterior one is articulated by a ring at its base, into a solid staple of the bone, thus admitting of free motion in every direction, without the possibility of displacement, except in case of absolute fracture. The third one, which is on the top of the cranium behind the eyes, is articulated much in the same manner as the posterior one of the other two; and of course, though these two have considerable motion in the mesial plane of the fish, they have very little in the cross direction. The one near the lip, however, can be moved with nearly the same ease and rapidity in every direction ; and while the others terminate in points, it carries a little membrane, or flag, of brilliant metallic lustre, which the fish is understood to use as a means of alluring its prey; and the position of the flag, the eyes, and the mouth, certainly would answer well for such a purpose]. The gill-membrane forms a large sac, opening in the axilla of the pectorals, supported by six very long rays, and with a small operculum. They have only three gills on each side. It is said that these fishes lurk in the mud, where, by agitating the rays on their heads, they attract smaller fishes, which mistake the appendages upon the rays for worms, and which are instantly seized, and transferred to the gill-sac. Their intestines have two or three short cceca near the commencement, but the fishes have no air-bladders. 1. piscatorius, the Fishing Frog, Sea Devil, and many other local names, attains sometimes the length of four or | Seen eR ne See a ee ea nee ee Ne ACANTHOPTERYGIL. 309 five feet ; and the extreme hideousness of its appearance has procured it some celebrity. [There are few parts of the muddy shores of the British islands where these ugly and voracious fish are not to be met with; and such is its propensity to keep its great mouth in exercise, that when captured in a net along with other fishes, it speedily begins to swallow its companions, especially if Flounders, which appear to be its favourite food. On some coasts, it is sought for on account of the live fish in its stomach, its own flesh being but small in quantity, and held in little estimation. Another European species, L. palviparus, has its second dorsal lower, and five vertebre fewer in the spine. Chironectes. These have, like the last genera, free rays on the head, of which the first is small, and often terminating by a tuft; and those behind it are enlarged by a membrane, which is sometimes very broad, and at other times they are united into a fin. Their body and head are compressed, and their mouth opens vertically. Their gill membranes have four rays, and have no opening but a small hole behind the pectorals. Their dorsal extends along the whole back, and they often have cutaneous appendages all over their bodies. They have four gills, a large air-bladder, and a moderate intestine without ceca. They can inflate their great stomach with air, in the same manner as the Tetrodons blow up their bellies like balloons. On the ground, their two pairs of fins enable them to crawl along like little quadrupeds; and tie pectorals, in consequence of their position, perform the functions of hind legs. They can live out of the water for two or three days. They are found only in the seas of warm countries, and Aineas confounded many of them under the name ZL. histrio. [In some of the muddy estuaries on the north coast of Australia, from which the tide ebbs far back in the dry season, these Frog-fishes are so abundant, and capable of taking such vigorous leaps, that those who have visited the places have, at first sight, taken them for birds.] One might separate the species in which the second and third rays are united into a fin, and sometimes also joined to the other dorsals. Malthus. These have the head greatly extended and flattened, principally by the projection of the sub-opercu- lum; the eyes are forwards ; the snout projecting, with a little horn; the mouth under the muzzle, of mean size, and protractile; the gills sustained by six or seven rays, and opening by a hole above each pectoral. They have a simple dorsal, which is soft and small; and there are no free rays in the head. The body is studded with osseous tubercles, and bordered round with cirri. They have neither cceca nor air-bladder. The remaining genus of this family is Batrachus,the Frog-fishes, properly so called. They have the head flattened horizontally, and much larger than the body; the gape deeply cleft; the operculum and sub-operculum spinous; six gill-rays; the ventrals straight, attached under the throat, with only three rays, of which the first is broad and lengthened: the pectorals are carried by a short arm, resulting from an elongation of the carpal bones: their first dorsal is short, supported by three spinous rays; the second is soft and long, and has the anal corresponding to it; their lips are often garnished with filaments ; their stomach is an oblong sac; their intestines are short, and with- out coeca; and their air-vessel is anteriorly deeply forked. They lurk in the sand, in order to swallow small fishes, in the same manner as the members of the last genus; and it is thought that wounds inflicted by their spines are dangerous. They inhabit both oceans. In some, the scales are smooth, and they have a membrane over the eye; others are scaly, and want that membrane. [None of them appear in the authenticated lists of British fishes.} THE FOURTEENTH FAMILY OF THE ACANTHOPTERYGII. Laprip& (the Wrasse, or Rock-risH Family). This family are easily known by their appearance. They have an oblong body, covered with scales ; and a single dorsal, supported anteriorly by spinous rays, often furnished with membranous lamine. The jaws are covered by fleshy lips. There are three bones in the pharynx,—two upper ones attached to the cranium, and a large under one. All the three are furnished with teeth, arranged like a pave- ment in some, and pointed, or in laminz, in others; but generally stronger than is usual in the class of Fishes. Their intestinal canal is either without cceca, or with two small ones; and they have a large and strong air-bladder. They admit of division into various genera and subgenera. Labrus, or Lipped—that is, Thick-lipped—Fishes. A very numerous genus, the species of which much resemble each other in their oblong form, and in their double fleshy lips, from which they receive their name. One of these lips adheres immediately to the jaw-bones, and the other to the suborbitals. They have thickly-set gills, with five rays. Their conical maxillary teeth (of which the middle and front ones are the largest), and their cylindrical teeth in the pharynx, are arranged like a pavyement,—the upper ones with two large plates, and the under with one only, which fits to the others. Their stomach has no cul-de-sac, but is continued in an intestine without cceca, which, after two reduplications, ter- minates ina wide rectum. The air-bladder is single, and strong. There are several subgenera. Labrus, properly so called, vulgarly termed ‘‘ Old Wives of the Sea.”’, They have no spines or notches in the operculum or pre-operculum, and the operculum and cheek are covered with scales. The lateral line is nearly straight. The European seas furnish several species, which, from variations of colour in the same species, are not easily distinguished from each other. L. maculatus, the Balloon Wrasse, is a foot or eighteen inches long, with twenty or twenty-one spines in the dorsal; blue or greenish above ; white below; marked all over with yellow, and 319 PISCES. sometimes the yellow colour predominates. [This species 1s numerous upon the British shores, though they are not very often caught ; and from the variations of their colours they are not easily identified. They frequent deep pools among the rocks, hide themselves in fuci, and are understood to feed chiefly on Crustacea. If the fishermen know their haunts, they take a bait freely ; and, according to the report of Mr. Couch, the first taken are always the largest. They frequent the rocky shores only. They spawn in April; and the fry, which are then of small size, remain among the rocks during the summer. It is understood that the blue colour, which appears to be characteristic of the high condition of the fish, is very evanescent. J. lineatus, the Lineal streaked, is more clouded; has irregular bands along the flank, the ground of which is reddish; and the dorsal spines are less nume- rous, and the soft part of the fin lower, than inthe former species. This species is named as a British fish, but it appears to be exceedingly rare. L. variegatus, the Blue-streaked, is one of the most beautiful of the family, of an orange red, paler on the belly, having the sides and irides striped with fine blue. The lips are capable of great extension, and there is a single row of pointed teeth in each jaw. It is found in the British seas, but only on the south and south-west coasts. J. vetuda, is also named as a British fish. It is dark purple, black on the upper part, paler on the belly, and has the fore part of the head flesh-coloured, tinged with purple, and the eyelid blue. Few specimens have been met with on the British shores, and those of comparatively small size. Perhaps it is the Merula of Gmelin. L. carneus, the Three-spotted Wrasse, reddish in the colour, with four light spots, and three black ones intermediate, extending from the middle of the dorsal to the root of the caudal. It belongs to the Mediterranean, but has been found on the Channel-coast of England, in the Firth of Forth, and even on the coast of Norway, and in the Baltic. There are various other species; but, as we have said, they are not easily distin- guished from each other, in consequence of the change of colour to which they are subject. ] Cheilinus, differs from Labrus, properly so called, in having the lateral line interrupted at the end of the dorsals, where it recommences a little lower down. They are beautiful fishes, inhabiting the Indian seas. Lachnolaimus, (Captains), have the general character of Labrus; but their pharynx has no pavement-like teeth, except in the posterior part,—the remainder of them, as well as a part of the palate, being covered witha villous membrane. They are easily known by the first spines of the dorsal, which extend in long flexible threads. They are American fishes. Julis, have the head entirely without scales, and the lateral line forming a curve near the end of tbe dorsal. There are some in the Mediterranean, but they are more numerous in the tropical seas. [They are generally small but beautiful fishes: some are violet, some bright scarlet, some rich green, and some marked with golden colour; and those which have the caudal fin rounded, or truncated, have the first dorsal rays extended in long filaments. ] Anampses, have the character of the last, with the exception of two flat teeth, which project from the mouth, and curve upwards. The two known species are from the Indian seas. Crenilabrus. These fishes are separated from the Lutjanus of Bloch, to arrange them in their proper place. They have the true characters of Labrus, both external and internal; and differ only in having the border of the pre-operculum toothed. Some species are found in the North Sea, such as Lutjanus ruprestis of Bloch, yellow, with clouded bands ranged vertically, and blackish; Z. norvegicus, brownish, irregularly marked with deep brown; L. melops, orange, spotted with blue, and a black spot behind the eye; L. exoletus, remarkable for five spines in the anal fin. The Mediterranean furnishes a number, most beautifully coloured, the most splendid of which is L, lapina, silvery, with three broad longitudinal bands, composed of vermillion dots, with the pectorals yellow and the ventrals blue. They are also abundant in the tropical seas; and many species, hitherto included in the genus Labrus, ought to be placed here. [Several species of this subgenus occur in the British seas, the chief of which are—Cranilabrus tinca, the Gilt-head; C. corneticus, the Gold-sinny; C. gibbus, the Gibbous Wrasse; and C. leusias, the Scale-rayed Wrasse; but they are all small fishes, in little or no estimation. ] Coricus. This subgenus has all the characters of the last, in addition to which the mouth is little less protractile than in the next. Only one small species is known, which inhabits the Mediterranean. This genus is removed from Sparus, in order to be placed near the preceding ones. Epibulus. These fishes are remarkable for the extreme extension which they can give to their mouth by means of a see-saw motion of their maxillaries, and the sliding forward of the intermaxillaries, which instantly forms a kind of tube. They make use of this artifice for seizing small fishes which pass near this curious instrument; and the same artifice is resorted to by the Coryci, the Zei, and the Smares, according to the degree of protractility of the mouth. The entire body and head of this subgenus are covered with large scales, the last track of which ad- vances upon the anal and caudal fins, as in Cheilinus. The lateral line is similarly interrupted as in the latter ; and, as in Labrus, there are two long conical teeth in the front of each jaw, followed by smaller blunt ones. The known species is from the Indian seas, and is of a reddish colour. Clepticus. This subgenus has a small cylindrical snout, which is suddenly advanced forward, but which is not so long as the head. The teeth are small, and barely perceptible to the touch; the body is oblong; the lateral line continuous ; and the dorsal and anal are enveloped in scales nearly to the top of the spines. One species, of a red colour, and from the West Indies, is the only one known. Gomphosus. These Labride, with the head entirely smooth, as in Julis, have the muzzle in the form cf a tube, composed of the prolonged maxillaries and intermaxillaries, as far as the small opening of the mouth. Several species are taken in the Indian Ocean, and the flesh of some is considered delicious. ‘ Xirichthys, resemble Labrus in their general form, but are much compressed. The forehead descends towards the mouth with a sharp and almost vertical line, formed by the ethmoid and the ascending branches of the inter- maxillaries. Their bodies have large scales ; their lateral line is interrupted; their jaws are furnished with conical ACANTHOPTERYGII. 311 teeth, largest in the centre ; the pharynx is paved with hemispherical teeth; the intestinal canal has two flexures, but no cceca; the stomach has no cul-de-sac, and they have a toierably long air-bladder. [Until Cuvier arranged them differently, they were always classed with the Coryphenes, from which they differ much, both externally and in- ternally.] They most nearly resemble Labrus, and are not easily distinguished from it, except by the profile of the head. Are found in the Mediterranean, and also in the southern seas; and the flesh of some is much esteemed. Chromis. These have the lips, protractile maxillaries, pharyngeals, and general aspect of Labrus; but their teeth resemble those of a card, except a range of conical ones in front. Their dorsal fins have long filaments ; their ventrals are produced into long threads; their lateral line is interrupted; and their stomach forms a cul-de-sac, but has no cceca. A small one, of a chestnut-brown colour, is taken in yast numbers in the Mediterranean; and there is one in the Nile, C. niloticus, tbe Egyptian Corycina of the ancients, which attains the length of two feet, and is reckoned the best fish in Egypt. Cychla, have the teeth small and crowded, formed into a large band, and the body elongated, which are their chief differences from the preceding subgenus. ; Plesiops, have the head compressed, the eyes near each other, and extremely long ventrals; but in other respects they resemble Chromis. Malacanthus. These have the general character of Labrus, and the same teeth in the maxillaries, but their teeth in the pharynx are arranged like those of a card. Their bodies are elongated, their lateral line continuous, their operculum terminated by a small spine, and their long dorsal has only a few fiexible spinous rays in the fleshy part. A species is found in the West Indies, of a yellowish colour, irregularly streaked across with violet, which, like many others belonging to this family, has been improperly ranged with the Coryphenes. Scarus.— The fishes of this genus are remarkable for their jaws-—that is to. say, for their inter- maxillaries and premandibles,—which are convex, rounded, and furnished with scale-like teeth on their margin and anterior surface. These teeth succeed each other from the rear to the front in such a manner that the bases of the newest form a trenchant range. It has been erroneously supposed by naturalists that the bone in this state is naked. In the living state, the jaws are covered with fleshy lips, but there is no double lip adhering to the suborbital bones. These fishes have the oblong form of Labrus, with large scales, and an interrupted lateral line. They have two plates in the upper part of their pharynx, and one in the under, furnished with teeth as in Labrus; but their teeth are in trans- verse laminz, and not rounded and arranged like the stones of a pavement. The Archipelago contains one species, of a blue or red colour, according to the season, which is the S. creticus of Aldrovandus; and which, after new investigations, I believe is the true Scarus so celebrated among the ancients, which, during the reign of Claudius, Elipertius Optatus the Roman admiral sailed to Greece in order to obtain and distribute through the Italian seas. It is still eaten in Greece, and its intestines are used for sea- soning. There are numerous species in the tropical seas, which, on account of the form of their jaws and the brilliancy of their colours, are called Parrot-fishes. Some have the caudal fin in the shape of a crescent; and of these a few have the front singularly enlarged and rounded, while in others it is truncated toa square. These constitute the genus Scarus, properly so called, from which two subgenera may be separated :—Calliodon, which have the lateral teeth of the upper jaw separate and pointed, and on the same jaw an anterior range, much smaller in size; and Odaz, which resemble the true Labrus in their thickened lips and uninterrupted lateral line, but their jaws are constructed as in Scarus, except that the bones are flat, not rounded, and are coyered by the lips. Their teeth, however, resemble pavement, like those of Labrus. THE FIFTEENTH FAMILY OF THE ACANTHOPTERYGII. FIisTULARIDz (Pipe-mouthed Fishes). The fishes of this family are characterized by a long tube projected forwards from the cranium, and composed of elongations of the ethmoid, vomer, pre-operculum, inter-operculum, pterygoids, and tym- panals, at the extremity of which they have the mouth, composed, as usual, of intermayillaries, maxil- laries, palatals, and mandibles. Their intestine has no great inequalities, nor many flexures ; and their ribs are short, or wanting. The family consists of two genera :—Fistularia, with the bodies cylindrical ; and Centriscus, in which it is oval and compressed. Fistularia. Fishes of this genus receive their particular name from the long tube common to all the family. Their jaws are at its extremity, but little cleft, and opening nearly in a horizontal : irec- tion. Their head, thus elongated, is equal to a third or a fourth of the length of the body, which is itself long and slender. There are six or seven rays in their gills; and some osseous appendages extending behind the head, by means of which the anterior part of the body is more or less strengthened. The dorsal is directly above the anal; and the stomach is a fleshy tube extending in a straight canal, but with two coeca at the commencement. There are two subgenera. 312 PISCES. Fistularia, Pipe-mouths, properly so called. These have omy one dorsal, consisting, in great part, as well as the anal, of simple rays. Their intermaxillaries and the lower jaw are furnished with small teeth. From between the lobes of the raudal fin there arises a sort of filament, which is sometimes as long as the body. The tube of the muzzle is depressed; the air-bladder is exceedingly small; and the scales on the skin are invisible. They are found in the warm seas of both hemispheres. [Sailors term them Tobacco-pipe Fishes, and they are of no value, except as curiosities. | Aulostomus. These have numerous free spines before the dorsal; and their jaws are toothless: their body is very scaly; not so slender as in the former subgenus, but enlarged and compressed between the dorsal and the anal, which enlargement is followed by a short and slender tail, ending in a common fin. The tube of the muzzle is shorter, wider, and much more compressed than that of the true Pipe Fishes ; and the air-bladder is larger. There is but a single known species, which is a native of the Indian Ocean. Centriscus, or Snipe-fish.—These have the tubular muzzle characteristic of the family; but the body is oval or oblong, not lengthened, compressed laterally, and sharp on the upper part. They have only two or three slender gill-rays ; a spinous first dorsal ; and small ventrals behind the pectorals. Their mouth is very small, and opens obliquely: their intestine has two or three folds, but no cceca: and their air-bladder is of considerable size. As in Fistularia, they admit of division into two subgenera. Centriscus, properly so called. These have the first dorsal fin backwards; and the first dorsal spine, which is long and strong, connected, by intermediate pieces, with the bones of the shoulder and the head. They have the body covered with small scales, and some larger denticulated ones over the apparatus connected with the spinous ray of the first dorsal. [This ray is strong in itself, firmly supported, and with rugged teeth on its posterior edge, capable of being moved, and thus forms a very powerful weapon. One species, C. scolopax, the Sea Snipe, Sea Trumpet, or Bellows Fish of the Cornish coast, is common in the Mediterranean, and is occasionally found on the south coast as a straggler. The specimens met with are not large, not exceeding five or six inches in length. Che young are of a brilliant silvery lustre; but when mature, the back is red, paler on the sides, and passing into silvery, glossed with gold, on the belly. All the fins are greyish white. The scales are hard and rough, granu- lated on the surface, and beautifully ciliated on the posterior edge. Its flesh is considered good. Its haunts are understood to be muddy bottoms, in moderately deep water ; and its food the minute Crustacea with which such places usually abound.] Amphisile, has the back mailed with large scaly pieces, of which the anterior spine of the first dorsal appears to be a continuation. Some have other scaly pieces on the flanks, and the spine in question placed so far behind that it is against the base of the tail; against which it, as it were, thrusts the second dorsal and the anal; this is C. scutatus. Others are intermediate between this form and that of the ordinary Centriscus, or have the mail plates covering only a part of the back; such is C. velitaris. All the known species are inhabitants of the Indian seas. THE SECOND ORDER OF BONY FISHES. MALACOPTERYGII ABDOMINALES. The second division of the Ordinary Fishes, [or fishes with bones in the skeleton,] the Malacopterygii, or Jointed-fin Fishes, consists of three orders, the distinguishing character of each of which is the position or absence of the ventral fins. The present order comprises fishes which have the ventral fins suspended to the abdomen, behind the pectorals, without being attached to the bones of the shoulder; they are the most numerous order of the division, and include the greater part of fresh-water fishes. They are divided into five families. THE FIRST FAMILY OF THE MALACOPTERYGIL ABDOMINALES. Cyprinip& (the Carp Family). These have the mouth shallow, the jaws feeble, very often without teeth, and the margin formed by the outer maxillaries ; but they have the pharynx strongly toothed, which compensates for the feeble armature of the jaws. They have few gill-rays; their body is scaly ; and they have no adipose dorsal, as we shall find in the Silures and Salmon. The stomach has no cul-de-sac or ccecal appen- dages; and they are the least carnivorous of all fishes. [The genera and subgenera are arranged as follows :|— MALACOPTERYGIL ABDOMINALES. 313 Cyprinus.-—These form a genus, at once very natural and very numerous; easily distinguished by he small mouth, the jaws without a single tooth, and three flat gill-rays. Their tongue is smooth ; their palate furnished with a thick, soft, and remarkably sentient substance, vulgarly called carp’s tongue. Their pharynx is a powerful instrument of mastication, having strong teeth on the inferior pharyngeal bones, and they bruise their aliments between these and a stony disc, which is set in a large cavity under a process of the sphenoid. They have but one dorsal; their body is covered with scales, usually large: they inhabit the fresh waters ; and are the least carnivorous of fishes,—feeding chiefly on seeds, the roots of plants, and [as is said] on mud and sludge. The stomach is continuous, with a short intestine without cceca; and the air-bladder is divided in two by a close contraction. The genus is divided into the following subgenera :— Cyprinus, the true Carps, have a long dorsal, of which, as well as the anal, the second ray has a spine more or less stout. Some of them have fleshy tubercles at the angles of the upper jaw, such as C. carpio, the Common Carp, a well-known fish: olive green above, and yellowish below; with strong toothed spines in the dorsal and anal, and short tubercles. The teeth of the pharynx are flat and striated in their crowns, [something like those of the Ruminant Mammalia}. Originally [as is understood] from the middle latitudes of Europe, it is now generally distributed, and thrives well in fish-ponds and other still waters, where it sometimes grows to the length of four feet: its flesh is esteemed as food. [Though an imported fish, Carp thrives well in England, though better in ponds than even in the most slow running parts of rivers; but in Scotland the waters are less adapted for them, and they breed and grow slowly, even in ponds. Austria and Prussia are the great Carp countries. To their vegetable food they add insects and worms, if such can be obtained : and when out of the water, they are very tenacious of life, in consequence of which they are easily extended from pond to pond.] Of the true Carps there is one race, C. rex earporum, the King of the Carps, which have the scales large, but often wanting in patches, and sometimes entirely. They are artificially varied,—that is, they occur only in ponds. Some foreign species are reddish brown, and others golden green, but these are imperfectly known. Some species want the barbules. Among these are,—C. carassius, having the body high, the lateral line straight, and the caudal fin squared off. This is a northern species. C. gibelio, the Crucian or Prussian Carp, has the body less elevated, the lateral line curved downwards, and tail fin forked. [It occurs as a British fish, but, perhaps, not so plentifully as the former]. C. awratus, the Golden Carp, [called Gold Fishes or Silver Fishes, according to their colour], These are black when young, but by degrees acquire the golden red for which they are esteemed; though some of them are silvery, with various clouds of all the three colours. Some have no dorsal; others a very small one; others, again, a large caudal of three or four lobes; and others, still, very large eyes; all of which varieties are merely accidental, and the results of that artificial treatment which they receive when kept in glass vessels for ornamental purposes. Allied to these is the smallest of the European Carps, C. amavus, only about an inch in length; greenish above, pale yellow beneath, with a steel-blue line on each side of the tail, in April, which is the spawning season. Barbus, the Barbel, or Bearded Fish—from the cirri at its mouth—has the dorsal and anal short ; a strong spine for the second or third dorsal ray ; two cirri at the point of the muzzle, and two at the angles of the upper jaw. [B. communis,] the Common Barbel, known by its long head, is very com- mon in streams and fish-ponds, and sometimes grows to the length of ten feet. [In the sluggish parts of the Thames, and some of its affluents, Barbel ‘are very plentiful. They are said to plough up the mud with their noses, which, setting very small animals adrift in the water, attracts those small fishes on which the Barbel feeds. ] Gobio, the Gudgeons, have the dorsal and anal short, an1 are without spines or beards. In slow-running rivers, where there is a gravelly interruption, they are found in vast shoals, readily caught, and, though small in size, esteemed for their flavour. Tinca, the Tenches, resembling the Gudgeons, but have the scales and cirri very small. The Common Tench is short and thick, of a yellowish brown, and sometimes beautifully golden. It prefers stagnant waters, and is not in much estimation as food. ' Cirrhinus, have the dorsal larger than the Gudgeons, and the cirri in the central part of the upper lip. Abramis, Bream, have neither spines nor cirri; a short dorsal behind the ventrals, or long anal; and the tail forked. There are two species, the Carp Bream, and the White bream; the first is the largest and most highly esteemed ; and the other is of little value, except to feed other fishes in ponds. Labeo. All foreigners ; have neither spines nor cirri along the dorsal, and remarkably thick lips, often furred. Catostomus, have the lips of the former, but a short dorsal above the ventrals. They are from North America. Leuciscus: dorsal and anal short; no spines, cirri, or peculiarities of the lips: species numerous, but little esteemed. (One species, the Ide, Z. idus, has been seen as a British fish; and besides this there are several others, as L. dobulus, the Double Roach; L. utilis, the Roach; L. vulgaris ; L. Lancasteriensis, the Graining ; Fig. 142—The Barbel. PISCES. L. cephalus; L. erythropthalmus, the Red Eye; L. ceruleus, the Azurine; ZL. alburnus, the Bleak; and L. phoxinus, the Minnow; but none of them are fishes of any great importance, except as bait for more valuable ones.] Gonorhynhus, have the head and body elongated, the operculum covered with small scales, the muzzle angular, the small mouth without teeth or cirri, three gill-rays, anda small dorsal over the ventrals. Known only in Southern Africa. Cobitis, Loche, or Loach, have the head small; the body long, covered with small scaies, and slimy; the ventral fins are far backwards, and above them there is a single dorsal; the mouth is at the end of the muzzle, little cleft, and without teeth, but having lips forming a sucker, and numerous barbules; the gills have small openings, and only three rays; the lower bones of the pharynx are strongly toothed; no ceca to their intestines, and these are very small; their two-lobed air-bladder is inclosed in a case of bone, adhering to the third and fourth vertebre. There are three species in the fresh waters of Europe. C. barbatula, the Common Loach, or Beardie, is a little fish of four or five inches long, clouded, dotted with brown on a yellow ground, and having six barbules at the mouth. It is not uncommon in the shallow and clear-running streams; but on account of its lurking habits, the rapidity of its swimming when disturbed, and its small size, it is not often seen. Small as itis, its flesh is very good. U. fossilis, the Pond Loach, is sometimes a foot long, with longitudinal stripes of brown and yellow, and ten barbules to the mouth. They inhabit the mud of stagnant waters; and can subsist for a Jong time after the water has been dried up, or covered with ice. When the weather is stormy, they rise to the surface of the water, and keep it in a state of agitation by their motion; and when cold, they bury themselves in the mud. Ehrman states that they habitually swallow atmospheric air, which is discharged by the vent, after being changed into carbonic acid,— {a fact which is contrary to the usual physiology of the class]. Their flesh is soft, and has a muddy flavour. C. tenia, the Groundling, has six barbules, and the body compressed, of an orange colour, marked with a row of black spots. It has a large spine behind each nostril. It is the smallest of the species inhabiting the smaller running waters, and lurking under stones. [It is found in the British rivers, and is probably much more nume- rous than is generally represented ; but as it is of-no value, it is regarded only by naturalists.] Anableps. This genus, long, but very improperly, united with Cobitis, has strong peculiar characters. The eyes are prominent, placed under a sort of roof formed by the side of the frontal; and the cornea and iris are di- vided by transverse bands, which gives the fish the appearance of having four eyes, whereas in reality it has only two. There are certainly two openings to each eye, but still, in its essential parts, the organ is single; and whether vision is performed by the anterior or posterior opening, the same sentient organ is acted upon. ‘They have also the generative and urinal aperture, in the male, placed before the vent; and the female brings forth her young alive, and in a state of considerable advancement. The body is cylindrical, with strong scales; there are five gill-rays; the head is flat; the snout blunt, and the mouth across its extremity, with small crowded teeth in both jaws; the intermaxillaries have no peduncle, but are suspended to the nasal bones; the pectorals are in part scaly; the dorsal is small, and nearer the tail than the anal; the pharyngals are large, and covered with small globular teeth; the air-bladder is large; and their intestine is wide, but without any coeca. Only one spe- cies, A. tetropthalmus, the Four-eyed, is known. It inhabits the rivers of Guiana. Pecilia. These have the jaws horizontally flattened, with a small opening, and furnished with a single row of small and very fine teeth ; the upper part of the head flat; the gill-openings large, with five gill-rays; the body rather short; the ventrals rather forward ; and the dorsal and anal against each other. They are small fishes of the fresh waters of America, and bring forth their young alive. Labias, resemble the preceding, only the teeth have several points. One species, a very small fish, with little black streaks on the flanks, is found in Sardinia. Fungulus, still resemble Peecilia, but their teeth are set like velvet: those in the anterior range are crooked, and they have strong conical ones in the pharynx. They have only four gill-rays. Molenesia, have the anal between the ventrals, and immediately under the anterior part of the large dorsal ; teeth like Fungulus, and four or five gill-rays. [These genera are chiefly found in America. ] Cyprinodon, have fine velvety teeth, and six gill-rays, but in other respects are like the preceding genera. C. umbra inhabits the lakes, and especially the subterranean waters which are so common in Southern Austria. They are small fishes, of a russet colour, with brown spots. THE SECOND FAMILY OF THE MALACOPTERYGIT ABDOMINALES. Esocip& (the Pree Family). These have no adipose dorsal fin. The margin of the upper jaw is formed by the intermaxillary; or when not so formed, the maxillary is toothless, and concealed by the lips. - These fishes are extremely voracious; their intestine is short, and has no cceca; all of them have an air-bladder. Many species inhabit the fresh waters, or ascend rivers. With the exception of Microstoma, all the known ones have the dorsal opposite the anal. Linneus included them all in the genus Esox, but we divide that genus into the following subgenera :— Esox, Pikes properly so called, have small intermaxillaries, furnished with small pointed teeth in the middle of the upper jaw, where they form two rows, but the lateral parts of the maxillaries are without teeth. The vomer, the palatals, the tongue, the pharynx, and the gill-arches, are roughened with teeth like a card; and they have, in MALACOPTERYGII ABDOMINALES. 315 the sides of the under-jaw, a row of long and pointed teeth. The muzzle is oblong, obtuse, broad, and depressed. They have but one dorsal placed over the anal; a large forward stomach, continued in a slender intestine with two flexures, but without cceca; and their air-bladder is very large. E. lucius, the Common Pike, Jack, Pickarel, Gedd, and many other names, is well known to every one as the most voracious and destructive of fishes, but its flesh is good, and easy of digestion. [Besides its fame, as an eater and as being eaten, Shakspeare has thrown a ray of glory around the Pike by representing it as the ‘‘ White Lucie” in the armorial bearings of the immortal Justice Shallow. In some of the still waters of Britain, Pike of thirty- four pounds’ weight have been killed. It is generally said that, notwithstanding the havoc which the Pike com- mits among smaller fishes, it will not stand the attack of a Trout of equal weight, the immense velocity of the latter fish in swimming giving it a decided advantage}. Besides this, two species have been noticed in the fresh waters of North America,—E. reticularis, with a net-work of brownish lines; and E. estor, sprinkled with round blackish spots. Galavius, have no visible scales on the body. The opening of the mouth is small, with middle-sized pointed teeth in both jaws, the margin of the upper being formed by the intermaxillary, and a few strong crooked teeth on the tongue. There are pores in the sides of the head; and the position of the dorsal and anal fins, and also the digestive organs, are like those of the Pikes. Alepocephalus. Head naked, body with broad scales, mouth small, teeth minute and crowded, eyes very large, and eight gill-rays. A. rostratus, the only known species, is found in the depths of the Mediterranean. Microstoma. Snout very short, lower jaw beyond the upper, jaws and intermaxillaries with very small teeth, three broad and flat gill-rays, eyes large, body long, lateral line with firm scales, a single dorsal a little in rear of the ventrals, and digestive organs as in the Pike. The only known species (S. microstoma of Risso) inhabits the Mediterranean. Stomias. Snout extremely short, mouth cleft almost to the gills, gill-ray reduced to a little membranous lamina, and maxillaries fixed in the cheek; intermaxillaries, palatals, mandibles, and tongue, armed with long and crooked teeth, widely set; body elongated; ventrals far back; dorsal over the anal, and both near the caudal. Two species were discovered in the Mediterranean by Risso. Both are black, with rows of silvery spots on the belly. E. boa, Risso, has no cirri; S. barbatus, has a long and stout one, attached to the symphisis of the lower jaw. Chauliodus, resemble the former, but have two teeth in each jaw, across the other jaw when the mouth is shut; the dorsal between the pectorals and ventrals, which last are not so far back as in Stomias; the first dorsal ray terminates in a filament. C. Sloani, the only known species, has been found only at Gibraltar. It is about a foot and a half long, and of a deep green colour. Salana, have the head depressed, gill-lids folded downwards, and four flat gill-rays ; the jaws short and pointed, each furnished with a row of crooked teeth; the upper jaw formed entirely by intermaxillaries without peduncles; the lower jaw is a little lengthened at the symphisis by a small appendage carrying the teeth; the palate and the inner part of the mouth are entirely smooth, and there is not even a lingual projection. Belone. This genus have the upper jaw—which, as well as the under one, is extended into a long beak—com- posed of the intermaxillaries, and both jaws furnished with small teeth, without any others in the mouth, except in the pharynx, where they are arranged like a pavement. ‘The body is very long, and covered with scales which are scarcely visible, except one keeled row on each side, near the under edge of the fish. They are remarkable for the bright green colour of their bones. One species—the Common Gar-fish, Sea Pike, Mackerel Guide, Green- bone, and a number of other names—is not uncommon on some parts of the British shores, and as far north as the Arctic regions. It is of a greenish blue on the upper part, fading gradually into silvery white on the belly. There are several other species, some of which are said to attain the length of eight feet, and bite very severely. Notwithstanding the colour of the bones, which renders them repulsive to many persons, the flesh of these fishes is not unwholesome. Scomberesox, the Mackerel Pike, or Saury Pike, resembles the former in the length of its snout, its general shape, and its scales; but the last rays of the dorsal and anal are detached, and form spurious fins on the upper and under sides, like those of the Mackerel. They are found in the Mediterranean; [and the Common Saury is generally distributed along the British coasts, as far to the northward as the Orkneys]. They are gregarious fishes; and are followed and preyed upon by Porpoises, and also by the Tunny, and other large members of the Mackerel family. Hemiramphus, resembles the Gar-fish in its general characters, but has the upper jaw short, and the lower one drawn out into a long beak, without teeth. They are found chiefly in the seas of warm countries, though a stray one is occasionally met with in the south of England. Exocetus, (literally, “ Fishes out of the water’’]. These are at once distinguished from all the rest of the Abdo- minal Malacopterygii by the immense size of their pectoral fins, which are sufficiently large for supporting them for a few moments in the air. Their head and body are scaly, with a line of keeled scales along each flank ; their head is flat above, and laterally; the dorsal over the anal; the eye is large ; the intermaxillaries without peduncles, and found in the margin of the upper jaw; both jaws have small pointed teeth, and the pharynx pavement teeth ; they have ten gill-rays; their air-bladder is very large; their intestine straight, and without cceca ; and the lower lobe of the caudal fin much larger than the upper. They do not fly, in the strict sense of the term, but merely rise from the water to escape voracious fishes, and soon fall again,—their fins merely serving as parachutes, and being incapable of taking a new stroke in the air, as is done by awing. They are found in all the seas of the warm climates ; and it would seem that they have more enemies than most other fishes, for while the voracious fishes pursue and capture them in the water, the long-winged sea-birds seize them in the air; and between themselves 316 PISCES, and their swimming and flying enemies, they furnish one of the most singular sights in the warm seas. E. evilens, common in the Mediterranean, has the ventral fins long, and in rear of the middle of the body. EE. volitans, com- mon in the Atlantic, has the ventral fins small, and placed further forwards. The latter species sometimes visits the British shores, in single individuals, and eyen in shoals. They can leap more than two hundred yards in distance, and upwards of twenty feet in height. Their food is understood to be the small floating Mollusca; and themselves are good eating. Next to the Pike family, there is placed a genus of fishes which, though differing but little from that family in other respects, has longer intestines, and two ceca. It will probably give rise to a new family. This is Mormyrus, having the body compressed, oblong, and scaly; tail thin at the base, but swelling near the fin; skin of the head naked, covering the operculum and gill-rays, and leaving no opening for the latter but a vertical fissure, which has led some naturalists to assert that these fishes have no gill-lids, and only one gill-ray, whereas their gill-lids are perfect, and their rays five or six. Their gape is small, and resembles that of the Ant-eater, the angles being formed by the maxillaries. The teeth are small, notched at the extremities, and occupy the intermaxillaries and lower jaw; and there are bands of small crowded ones on the vomer and tongue. The stomach is a roundish sac, followed by a slender intestine with two cceca, almost always covered with fat; and the air-bladder is long, large, and simple. They are accounted among the best fishes of the Nile. Two species have a cylindrical muzzle,—the one having a long dorsal, and the other a short one; a third has both the snout and dorsal short; and in a fourth, the forehead forms a protuberance advancing in front of the mouth. There are various other species in the Nile [and probably also in the other African rivers], but they have not been described. THE THIRD FAMILY OF THE MALACOPTERYGII ABDOMINALES, Siturip# (the SHeat-FrisH Family.) These fishes are distinguished from all the rest of the order by the want of true scales, having only a naked skin, or large bony plates. The intermaxillaries, suspended under the ethmoid, form the margin of the upper jaw; and the maxillary bones are either simple vestiges, or extended into cirri. The in- testinal canal is large, folded, and without cceca. The air-bladder is large, and adheres to a peculiar apparatus of bones. A strong articulated spine generally forms the first ray of the dorsal and the pec- torals ; and there is sometimes an adipose dorsal behind the other, as in the Salmon family. The fol- lowing are the genera and subgenera :— Silurus.—These form a numerous genus, known by the naked skin, from the mouth being cleft in the end of the muzzle, and from a strong spine in the first ray of the dorsal. This spine is articulated only to the bones of the shoulder; and the fish can at pleasure lay it flat on the body, or keep it fixed in a per- pendicular direction, in which case it is a formidable weapon, and wounds inflicted by it are understood to be poisoned, which opinion has arisen from tetanus sometimes following the wound, not from poison certainly, but from the ragged nature of the wound itself. These fishes have the head depressed; the intermaxillaries suspended under the ethmoid, and not protractile ; the maxillaries very small, but almost always continued in barbules attached to the lower lip, and also to the nostrils ; the covering of their gills is without sub-operculum or gill-flap; their air- bladder, strong and heart-shaped, is attached, by its two upper lobes, to a peculiar bony structure, which again is attached to the first vertebra; the stomach is a fleshy cul-de-sac, having the intestinal canal long and wide, but without cceca. They abound in the rivers of warm countries ; and seeds of plants are found in the stomach of many of their species. The following are the subgenera :— Silurus, properly so called, with only a small fin of four rays on the fore part of the back, but with the anal very long, and approaching very close to the base of the caudal. There is no obvious spine in the dorsal; and the teeth in both jaws, and in the vomer, are like those of acard. SS. glanis, the Sly Silurus, is the largest fresh-water fish of Europe, and the only member of the genus in this quarter of the world. Itis smooth, of a greenish black spotted with black above, and yellowish white below; head large, with six cirri,—two large ones near the nostrils, and four shorter on the lower jaw. It sometimes grows to six feet in length, and weighs three hundred pounds. It is found in the slow-running rivers of Central Europe, and lurks in the mud to watch for its prey. Its flesh is greasy, and is sometimes employed as hog’s-lard. [It is named as a British fish, but its visits to these shores are very rare.] Is found in the rivers of Asia and Africa. Schilbus, have the body vertically compressed, a strong toothed spine in the dorsal, the head small and depressed, the nape suddenly raised, and the eyes low down. They have eight cirri, are found in the Nile, and their flesh is Li is... ee eee ee MALACOPTERYGIT ABDOMINALES. 317 less disagreeable than that of the other Siluri. Some American species, with the nead small, rounded, and blunt, having three cirri, and the eyes scarcely perceptibie, may form a new subgenus. Mystus, are Siluri with a second or adipose dorsal fin. They are found in the waters of Guiana. Pimelodes, body naked, and no lateral armature; but the subgenus requires division and subdivision. First, Bagrus has small crowded teeth in both jaws and the vomer, and may be subdivided by the number of cirri, and the shape of the head. With eight eirri, some have the head long and depressed, and others short and broad. With six cirri, some have the snout as depressed, and broader than that of the Pike; others have the head oval, and a kind of helmet of shagreen-like bones; in others, the head is round and naked; while others, again, have the head greatly depressed, the eyes low down, and the adipose fin very small; and there are yet others which have only four cirri. [Some of these, as Pimelodes cyclopum, are ejected in hot water from volcanoes. | Pimelodes, properly so called, want the teeth in the vomer, but often have them in the palate; the cirri and form of the head differ more than in the preceding subgenus; some have but a single row of teeth; some have the head helmeted, and a distinct bony plate between the helmet and the dorsal spine; others have a single plate from the snout to the dorsal; others, again, have the head oval and naked ; some with six cirri, and others eight; some with a large naked head are called Cats, which have six or eight cirri; then there are others which have the head small and flat, the dorsal minute, and the teeth scarcely perceptible; there are others still which have teeth on the palatals, sometimes like velvet, or like a card, with a buckler on the nape, distinct or united to the helmet, and the palatai teeth sometimes like a helmet; some singular ones have teeth like a card, under the skin of the cheek, and moveable; others yet have a lengthened snout, or a pointed one, nearly toothless. These last lead to,— Synodontis, with the snout narrow, and the lower jaw supporting an assemblage of teeth laterally flattened, ending in hooks, and individually attached to flexible peduncles. The helmet extends in one plate to the first spine of the dorsal, which is very strong, as are also those of the pectorals; the cirri, aid sometimes the maxil- laries, are barbed. ‘They are found in the Nile and other African rivers, but are not eaten. Ageniosus. Some of these have the maxillary turned up in a kind of toothed horn, instead of a fleshy cirrus ; and others have it concealed under the skin, with the dorsal and pectoral spines scarcely visible. Doras, have an adipose dorsal, with plates in the lateral line, armed with keels or spines; the dorsal and pectoral spines strongly toothed, the helmet rough, and the shoulder-bone pointed backwards. Some have teeth only in the upper jaw; others have the snout pointed, and the teeth absent, or hardly visible, with occasional lateral bristles to the cirri. Heterobranchus, head broad, from the helmet having two lateral pieces of the frontal and parietal bones; oper- culum smaller, but with a tree-like ramification on the third and fourth gill-arch, as a sort of supplemental gills.; viscera like the rest of the-family, but they have from eight to fourteen gill-rays, strong pectoral spines, no dorsal one, and the body long and naked. They inhabit the rivers of Africa, and some of those of Asia. Their flesh is indifferent, or bad. One of them, however, Macropteronotes, with a single indented dorsal, constitutes a considerable article of food in Egypt and Syria, where it is called the Sharmuth, or Black Fish. Others have a dorsal with rays, and also an adipose one. Protosus, have a second dorsal, with rays; and this and the anal long, and uniting to form a tail like an Eel; lips fleshy ; conical teeth in front of the mouth, globular ones behind, and those above placed on the yomer; skin naked; nine or ten gill-rays; eight cirri; and a singular branched appendage behind the vent, be- sides the tubercle common to the family. Some have large and toothed dorsal and ventral spines; others have them almost concealed under the skin. They are found in the East Indies. Callichthys, have the sides armed with four rows of scaly plates; head the same, but the snout and under-part of the body naked; one ray in the second dorsal; pectoral spines strong, and dorsal one feeble; mouth small; teeth barely visible; four cirri; eyes small, and lateral. They can crawl out of the water like an Eel. (These are the subgenera of Silurus]. Malaptherurus, has no dorsals with rays, but only a small adipose one in the tail, and no spines in the pectorals. The skin is smooth; the teeth small and crowded, and are ranged into a broad crescent in each jaw; there are seven gill-rays; and the jaws and viscera are like those of Silurus. M. electricus, the Raasch, or Thunder-fish of the Arabs, is the only known species. It has six cirri, and the head more slender than the body, but enlarged in front. Like the Torpedo and Gymnotus, it can communicate an electric shock, the organ of which is situated between the skin and muscles, and consists of a cellular tissue, inclosing a fluid, and abundantly furnished with nerves. It is found in the Nile, and the rivers of Central Africa. Aspredo, have the head flattened, and the anterior part of the body much widened; the tail long; the eyes small, and placed upwards ; the intermaxillaries under the ethmoid directed backwards, and with teeth on the posterior edge only; and they have the whole gill apparatus immoyeable, being soldered to the temporal bone and the pre- operculum ; gill-opening a mere slit behind the head, the membrane of five rays adhering everywhere else; the lower jaw is transverse, and shorter than the snout; the first ray of the pectorals is more toothed than in any other of the family; there is but one dorsal, with a weak first ray; but the anal is long, extending under the long and slender tail. Some have six cirri, some eight; and, in the latter case, one pair are attached to the maxillaries, the others to the lower jaw in pairs. Loricaria, have hard angular plates on the head and body ; small intermaxillaries suspended under the muzzle; transverse disunited mandibles, supporting hooked teeth, which are long, slender, and flexible. A large membranous veil encircles the opening; the pharynx is furnished with numerous pavement teeth ; the gill-lids are immoyeable, but two small plates supply their places ; they have four 318 PISCES, gill-rays; strong spines in the first dorsal, pectorals, and even ventrals; but neither cceca nor air-bladder. They form two subgenera :— Hypostomus, have a small dorsal with one ray; the labial veiled with papillz, with a small cirrus on each side ; no plates on the belly; and the intestines spirally convoluted, and as slender as a thread. They inhabit the rivers of South America. Loricaria, have one dorsal forwards, the labial veiled with cirri, plates on the under parts of the body, and the intestines moderately large. THE FOURTH FAMILY OF THE MALACOPTERYGII ABDOMINALES. SALMONID& (the SALMon, or Trout, Family). According to Linnius, these formed but one great genus, characterized by a scaly body, all the rays of the first dorsal soft, and the second dorsal adipose, or formed of skin inclosing fat, and without rays. They have numerous ceeca, and an air-bladder. Most of them ascend rivers; and their flesh is highly esteemed. They are naturally voracious; and as the form and armature of their jaws vary greatly, they may be arranged into the following subgenera :— Salmo, Salmon and Trout, properly so called.—These have great part of the margin of the upper jaw formed of the maxillaries; a row of pointed teeth in the maxillaries, the intermaxillaries, the palatals, and mandibularies, and two rows on the vomer, the tongue, and the pharynx,—being, in fact, the most completely toothed of all fishes. In old males, the extremity of the lower jaw is bent up towards the palate, where a groove receives it when the mouth is shut. The ventrals are under the first dorsal, and the anals under the adipose one. They have six gill-rays, or thereabouts ; the stomach is long and narrow, with numerous coca; their air-bladder extends the whole length of the abdomen, and communicates anteriorly with the gullet. Many species are spotted, and their flesh is in general very good. They ascend rivers to spawn, often leaping over cascades of considerable elevation, and finding their way to the brooks and small lakes of the most lofty mountains. [They are understood to return almost invariably to the rivers in which they are produced; and therefore the fixing, at the mouth of a river, of any sort of bar to their progress upwards, is sure to drive them from the estuary. According to Mr. Yarrell, one of the very best authorities, all the family are clouded with transverse dusky patches when very young,—analogous to what occur on all the species of Cats. ] S. salar, the Salmon properly so called, is the largest of the genus, with red flesh, and irregular brown spots, which disappear in fresh water; the cartilaginous beak of the male is not much hooked. They inhabit the seas of comparatively cold regions, whence they ascend the rivers for the purpose of spawning, at different times of the year according to the climate,—some in autumn, some in winter, and some in early spring. [The efforts which they make to overcome difficulties in the ascent are very great; and when they have made some progress up the fresu water, it is equally cruel and impolitic to capture them. It should seem that, in most of the British rivers, Satmon are diminishing in numbers, and becoming inferior in quality, the cause of which has not been explained in a satisfactory manner. In Ireland, where they have more recently become an article of commerce, they are found in considerable abundance. Salmon Fry have the tail forked, and the fork disappears as the fish advances in age; but the margin does not become convex, as in the Bull-trout.] S. Awmatus, is whitish, spotted with red and black; and the snout of the male is narrow, and much crooked in the lower jaw. Its teeth are more robust than those of the true Salmon, and its flesh as red; but it is inferior in quality. It is found in the mouths of rivers. S. Schiefermulleri, the Sea-trout, is smaller than the former, with the teeth more slender and longer. The flanks are sprinkled with small crescent-shaped spots, and the flesh is paler than that of the Salmon. S. hucho (perhaps the Bull-trout, or Gray Trout], grows to almost the size of the Salmon, and has strong teeth, and a pointed lower jaw in the male. The remaining Trouts are found in all the ciear streams of Europe, especially among mountains; and they are subject to great variations from age, food, and the nature of the waters; but these do not appear to account for all the differences. [In the same river, Trout are yellowish brown, with bright crimson spots, where the water is fine and pure; and lurid and dark, and greatly inferior in flavour, where it is tinged with peat.] S. /emanus, Geneva Trout, found in that lake, and some neighbouring ones; ground colour whitish, with small blackish spots on the head and back; sometimes forty or fifty pounds in weight: the flesh is white. S. trutta, Salmon Trout, bluish black above, pale on the sides, silvery on the belly, with cross-shaped spots towards the upper part, migratory in clear streams, and esteemed next in value to the Salmon. [It varies a good deal in colour; and, from its silvery lustre, it is called White Trout in some parts of Britain.] S. fario, the Common, or River Trout, is generaily smaller than the last, spotted with brown on the back, and crimson on the flanks,—the crimson spots usually sur- rounded by a pale-coloured circle; common in all the clear streams of temperate countries, and sometimes found two feet and a half long, and fifteen pounds in weight. [The Gil/aroo Trout of the Irish lakes appears to be a variety, in which the internal coating of the stomach is modified a little to suit the nature of the food. S. ferox, the Great Grey Trout, inhabits the deeper lakes, and grows to a large size, but its flesh is inferior.j S. savelinus, MALACOPTERYGIL ABDOMINALES. 319 the Welsh Char, or Torgoch, has red spots in the flanks, an orange belly, and red pectorals, with the first ray very thick and white. S. alpinus, nearly the same colour, but the first rays of the lower fins not so much distinguished. It abounds in Lapland, where it is very valuable. S. wmbla, Northern Char, found in various British lakes, and also in the Lake of Geneva. [There are various other members of the genus Salmo, but the line of distinction be- tween species and variety is sometimes not easily drawn.] Osmerus, the Smelt, has two rows of teeth on each palatal, but only a few in front of the vomer. Form like a Trout, but only eight gill-rays, and the body brilliant silvery, with some greenish reflections, but with no spots. {Found abundantly in some estuaries of British rivers at particular seasons, but very local. It seldom exceeds, and rarely equals, a foot in length. Its flesh is delicious.] Maillotus, mouth like the preceding, but teeth very small and crowded, and only in the jaws, palate, and tongue ; eight gill-rays, body lengthened, and small scales; first dorsal and ventrals behind the middle, pectorals large, round, and nearly meeting beneath. The only known species, S. groentandicus, the Capelin, classed by Gmelin © among the Herrings, is remarkably abundant on the shores of Newfoundland, and used as bait in the Cod fisheries, {and sometimes as manure for the land]. Thymallus, the Grayling, has the jaws like a Trout, but the mouth small, and the teeth remarkably fine; first dorsal long and high, scales much larger than on a Trout, stomach thick, and seven or eight gill-rays ; first dorsal long, as high as the body, spotted with black, and occasionally with red, with dusky bars on the large dorsal, Recent it smells like wild thyme, and when cooked in its perfume it is a dainty dish. Coregonus, the Gurniad, has the mouth as in the last, but with few teeth, and sometimes none, the scales larger, and the dorsal shorter. There are many species or varieties of this genus; some in the sea, others in the fresh waters only, and one occurs in several British lakes. [C. Willughbii, the Vendace, is found insome lakes of the south of Scotland. It feeds on insects, and very minute fresh-water Crustacea. ] Argentina, has the mouth small and toothless, but strong hooked teeth on the tongue, and small ones before the vomer, six gill-rays, and the digestive organs like those of a Trout. A. sphyrena, the only known species, has the air-bladder thick, and very much loaded with nacre—the silvery substance used in counterfeiting pearls ; it is found in the Mediterranean. The following subgenera, which have the numerous cceca of the Salmon, and the double air-bladder of the Carps, have not more than four or five gill-rays. Crimata, externally like Thymallus, and some of them have the same teeth, differing only in the gill-rays. Others have teeth in both jaws, sharp and directed forwards. They inhabit the American rivers. Anastomus, like Thymallus, and with small teeth in both jaws, but the lower jaw is so turned up and enlarged at the point, that the mouth appears a vertical slit. Gastropelecus, mouth as in the last, but abdomen compressed, projecting, and sharp; ventrals small and far back, first dorsal over the anal; upper teeth conical, lower ones notched and trenchant. Plabucus, have the head small, the mouth shallow, a compressed body, the ventral keel entire and sharp, a ie anal, and the first dorsal opposite its commencement. Serrasalmus, has the body compressed, the belly toothed and sharp, and frequently a spine in front of the dorsal. The known species inhabit the South American rivers; and, it is said, pursue ducks, and even bathers; wounding them severely with their teeth, which are triangular, notched, and very sharp. Tetragonopterus, has teeth as in the former, but the mouth smaller, and no keel or tooth on the belly. Chalceus, with the same mouth and teeth, has the body oblong, and the teeth on the maxillaries small and rounded. Myteles, with triangular teeth hollowed in the crowns, and three points at the corners, mouth shallow, with two rows on the intermaxillaries, but none on the palate, the maxillaries, or the tongue. Some have the elevated form, falchion-shaped fins, spine directed forwards, and even the sharp and toothed belly, of Serrasalmus, but not the teeth. One American species grows large, and is good eating. Others have simply an elongated body, and the first dorsal between the ventrals and ‘he anal. These are Egyptian. Hydrocyon, have the point of the muzzle formed by the intermaxillaries, the maxillaries nearer before the eyes, and completing the aperture; the tongue and vomer are always smooth, but the jaws have conical teeth, and the large suborbital covers,the cheek like an operculum. Some havea close range of small teeth on the maxillaries and the palatals, and the dorsal fin between the ventrals and anals. They inhabit the tropical rivers, and taste like Carp. Others have a double row of teeth in the intermaxillaries and lower jaw, a single row in the maxillaries, and none in the palate; the first is over the ventrals. They inhabit Brazil. Others, again, have a single row in the maxillaries and lower jaw, with the teeth alternately very long and very sharp, and lodging in holes of the upper jaw when the mouth is shut; there are large scales upon the lateral line, and the first dorsal is between the ventral and the anal. They are also from Brazil. A fourth type have the muzzle prominent and pointed, the maxillaries very short, and with the lower jaw and intermaxillaries with a single row of closely-set teeth ; the firstis between the ventral and anal, and they have large scales. They too are from Brazil. Others, yet, have no teeth in the maxillaries or lower jaw, and what they have are few, but strong and pointed; their first dorsal is directly over the ventrals. ‘They inhabit the Nile. Cetharinus, have the mouth depressed, cleft at the end of the muzzle, and the upper margin entirely formed by the intermaxillaries ; the maxillaries are small and toothless, occupying oply the commissure ; the tongue and palate both smooth, the adipose, dorsal, and great part of the caudal, covered with scales. Found in the Nile. Some have three small teeth in the upper jaw, and the body elevated, but the belly not sharp or toothed. Others have many ranks of close teeth on the jaws, which teeth are slender and forked, and the fishes themselves are elongated. Saurus, muzzie short, gape cleft far behind the eyes, margin of the upper jaw composed wholly of intermaxil- 320 PISCES. laries, iong pointed teeth on the jaws, the palatals, and on the tongue and pharynx, but none on the vomer; eight or nine, often twelve or fifteen, gill-rays: the first dorsal a little behind the large ventrals ; the body, cheeks, and gill lid are scaly, the intestines like those of Trouts. They are marine fishes, and exceedingly voracious. One is found in the Mediterranean, a transparent one in the lake of Mexico, and several in India, where they are dried and salted as a relish. ‘ Scopelus, have the gape and the gill openings very deep. Both jaws with very small teeth, the margin of the upper formed entirely by the intermaxillaries, the tongue and palate smooth, muzzle very short and blunt, nine or ten gill-rays, a first dorsal between the ventrals and anal, and a second, in which there are slight vestiges of rays. One small species in the Mediterranean has brilliant silver spots on the belly and tail. Aulopus, combines the characters of Salmon andCod. Their gape is wide, their intermaxillaries forming the whole margin of the upper jaw ; their palatals, the front part of the vomer, and the lower jaw with a band of card- shaped teeth, but the tongue and flat part of the palate are only rough. The maxillaries are large and toothless, as in many fishes, their ventrals are under the pectorals, with the external rays thick and unforked. ‘The first dorsal answers to the first half of the space between the ventrals and anal. They have twelve gill-rays, and large scales upon the cheeks, gill-lids, and body. One species inhabits the Mediterranean. Sternoptyx, are little fishes with high compressed body, the mouth directed upwards, their humeral bones forming a trenchant crest forwards, and terminating below in a little spine. The pelvis formed by a small spine before the ventrals. There are small grooves on each side of the pelvic crest, which has been considered as a ster- num, and hence their name. They have an osseous crest before the first dorsal, and a little membrane answering to the second. The borders of the mouth are formed by the maxillaries. Two speeies are found in the Atlantic, which may become types of two distinct genera. One of these has five gill-rays, the other nine. THB FIFTH FAMILY OF THE MALACOPTERYGIL ABDOMINALES. CLupeip& (the Herrine Family). These have no adipose dorsal, and, as the Trout, they have their upper jaw formed in the middle by intermaxillaries without peduncles, and the sides by maxillaries. Their bodies are always scaly, and most of them have an air bladder and many cceca. Few of them ascend rivers, though they appear periodically upon the shores. Clupea, the Herrings, have the intermaxillaries narrow and short, forming but a small portion of the jaw, which is completed on thessides by protractile maxillaries. The lower edge of the compressed body is notched by scales, resembling the teeth of a saw. The gill openings are so wide that the fishes die almost the instant they are out of the water. The gill arches towards the mouth pectinated, the stomach is an elongated sac, the air bladder long and pointed, and their bones are very slender and numerous. They consist of several subgenera. Clupea, Werrings properly so called, with the mouth mean-sized, and the upper lip entire. C. harengus needs no description ; it appears periodically in numerous shoals, [but does not breed in the Polar seas, as was once stated, as it gets southward into warm latitudes. Its flesh is dry and inferior]. C. sprattus resembles the Herring, but is much smaller. C. alba, White Bait, a small and delicate species, resorts to the top of the brackish water to mature its spawn. It is found in various estuaries, and is highly esteemed. C. pilchardus is about the size of the Herring, but has the dorsal more forward. It inhabits more southernly than the Herring, and is caught in vast numbers on the coast of Cornwall. C. sardina, the Sardine, is like the Pilchard, only smaller. It is taken in the Mediterranean, where the Herring is unknown, and also on the west coast of France. Its flavour is highly esteemed. Alosa, has a notch in the middle of the upper jaw, but is in other respects like the Pilchard and Sardine. A. vul- garis, the Shad, is much larger and thicker than the Herring, growing to three feet in length, and it has no teeth, and a black spot behind the gills. In spring it ascends rivers, when it is much esteemed; but when taken in the seais dry and disagreeable. A. finta, the Twaite Shad, has teeth in the jaws, and five or six dark spots along the side. It is the Common Shad of the British rivers; but is considered inferior to the Common Shad, or Alice Shad, as it is called, which, as a British fish, is by no means so common. Chatoessus, resembles a Herring, only the first dorsal ray is prolonged in the filament. Some have the jaws equal, the muzzle not prominent, and the mouth small and without teeth. Others have the muzzle prominent, but the mouth small. The fibres of the first gills unite with those on the opposite side, and form under the palate curious pinnated points. These are from the warm seas, and they complete the subgenera of Clupea as at present arranged, though the following come appropriately after the Herrings, inasmuch as they have the belly sharp and notched. Odontognathus, have the body very compressed, with three sharp teeth near the vent, a long but narrow anal, a small and feeble dorsal, which is always broken, six gill-rays, the maxillaries prolonged and a little pointed, and furnished with small teeth directed forwards, and wo apparent ventrals. One species from Cayenne is known, resembling a small Sardine, but having the body more compressed. Pristigaster, head and teeth as in the Herrings, four gill-rays, ventrals generally wanting, belly compressed, arched, and toothed. They are found in both oceans. MALACOPTERYGII SUB-BRACHIATI. 321 Notopierus. Gill-lids and cheeks scaly; the suborbitals, pre-operculum, and operculum have two crests; the lower jaw is keeled, the belly toothed, and the palatals and jaws have fine teeth; the upper jaw formed in great part of the maxillaries. Their tongue is set with strong crooked teeth; they have one strong and bony gill-ray; ventrals hardly visible, followed by a long anal, which occupies three-fourths of the length, and is united, as in Gymnotus, with the fins of the tail and back; opposite the middle of the anal there is a small dorsal with soft rays. They are found in the stagnant fresh waters of India, being the Gymnotus notopterus of Pallas. Fingraulis, the Anchovies, distinguished from the Herrings by the mouth being more deeply cleft, the gill-openings wider, and ten or twelve gill-rays. The small intermaxillaries are fixed under a little pointed snout, in advance of the mouth, and the z maxillaries are long and straight. E. enchrasicho- Fig. 143—The Anchovy. dus, the Common Anchovy, so well known for its rich and peculiar flavour, is about a span long, bluish above, silvery below, the abdomen not trenchant, the anal short, and the dorsal over the ventrals. Taken in vast numbers in the Mediterranean, and less abundantly in the ocean. 4H. meletia is a Mediterranean species. E. edentulus, an American species, without teeth. Thryssa, differs from the Anchovies in having the belly toothed, and the maxillaries very long. It is an East Indian subgenus. Megalops. Fins and jaws generally formed like those of the Herring, but the belly not trenchant, nor the body compressed ; teeth in the jaws and palate very small and numerous; from twenty-one to twenty-four gill-rays ; and the last ray of the dorsal, and often of the anal, extended in a filament. One American species, the Apalite, is found twelve feet long, has fifteen rays in the dorsal, and a filament to that in the anal. An Indian species has seventeen dorsal rays. Elops, resembies the former, but is rather longer, wants the dorsal filament, has more than twenty gill-rays, and the caudal with a flat spine above and below. Buterinus, has jaws like those of a Herring, a round and lengthened body, and prominent snout; the mouth shallow; the jaws with small, crowded teeth; and the tongue, vomer, and palate, have rounded ones, also closely set. There are twelve or thirteen gill-rays. This and the former genus are beautiful fishes, of a silvery colour, with many bones and ceeca, and they grow to a large size. Chirocentrus, has the upper jaw as in the Herring, with a row of stout conical teeth in both jaws, the two middle ones in front very long; the tongue and gill-arches toothed like a card, but not the palatal or vomer; seven or eight gill-rays, the latter ones very broad; a pointed scale above and beneath each pectoral; body long, com- pressed, and sharp, but not toothed on the belly; verntrals very small, and shorter than the anal, which is opposite; stomach and air-bladder long and slender. Only one known species, of the Indian Ocean, and silvery. Hyodon, has the form of a Herring, but the belly not toothed, eight or nine gill-rays, and the teeth and the mouth like those of a Trout. Found in the fresh waters of North America. Erythrinus. Upper jaw almost entirely formed of the maxillaries; conical teeth in the edges of each jaw; crowded teeth in the palatals; five broad gill-rays ; head round, blunt, with hard bones, but no scales; body oblong, com- pressed, with scales like Carp; dorsal opposite the ventrals; stomach and air-bladder large; cceca smail. Found in the tropical rivers, and esteemed as food. ' Amia, have the head like the last, but twelve gill-rays, and a hard buckler on the under-jaw; pavement-teeth behind the conical ones; nostrils tubular; stomach large; intestine wide, and with no cceca; air-bladder cellular, like the lung of a Reptile. Found in the rivers of the southern states of America, feeds on Crustacea, and is rarely eaten. Sudis,—tresh-water fishes resembling Erythrinus, but having the dorsal and anal placed opposite each other, and occupying the last third of the body. ‘They inhabit the rivers of tropical countries. Osterglossum, differs from the last by having two cirri suspended from the lower jaw, and the tongue closely toothed like a rasp. A large species inhabits Brazil. Lepisosteus, have long teeth in the edges of the jaws, and their anterior surfaces rasp-like; the scales as hard as stone; the dorsal and anal opposite, and far back ; the intestine with two folds, and numerous cceca; air-bladder cellular. Of tropical America, grow large, and are good eating. Porypterus. Sides of the upper jaw immoveable; head covered with sharpened bony plates; body with strong scales ; one gill-ray ; a number of separate fins on the back; the teeth like a rasp, with long ones in front; the stomach large; double air-bladder, with large lobes, the left one opening freely into the gullet. They are found in the African rivers, and are eatable. THE THIRD ORDER OF BONY FISHES,— MALACOPTERYGII SUB-BRACHIATI,— Have the ventrals under the pectorals, and the pelvis suspended to the shoulder-bones. [They are thus better adapted for ascending and descending than the abdominal fishes. ] Y ee a EE EE EE eee nn een PISCES. THE FIRST FAMILY OF THE MALACOPTERYGII SUB-BRACHIATI. Gapip& (the Cop Family). This family are almost wholly included in the great genus Gadus, easily known by having the yentrals inser‘ed under the throat, and pointed. The body is moderately long, a little compressed, and covered with small soft scales; the head is well-proportioned, but naked: all their fins are soft; the jaws and front of the vomer have unequal-pointed teeth, of medium or small size, disposed in several rows, like a card or rasp; the gill-openings are large, and there are seven rays. Most of them have two or three fins on the back, some behind the vent, and a distinct caudal fin. The stomach is a large and strong sac; and the intestine long, with numerous cceca. The air-bladder is large and strong, and often notched in the margins. The greater number live in the cold or temperate seas, and furnish a most important branch of the fisheries. Their flesh is white, easily separable into flakes, and, gene- rally speaking, wholesome, easy of digestion, and agreeable to the palate. [Taken altogether, they are probably more really serviceable to Man than any other family of fishes. Their reproductive powers are great, and their numbers countless; and they have the advantage of being generally found in vast shoals, at particular places.] They can be subdivided as follows :— Morrhua, Cod, properly so called, with three dorsals, two anals, and a cirrus at the point of the lower jaw. They are the most numerous and valuable of the family, consisting of*three sections, or species :—G. morrhua, the Cod, two or three feet long, with the back spotted brown and yellow ; inhabits all the north seas, and multiplies exceed- ingly in the colder latitudes. They are taken in vast numbers for salting, and also for immediate use. [Their appearance and quality vary a good deal with the nature of the ground.] G. «glefinus, the Haddock, brown on the back, silvery on the belly, with the lateral line, and a spot behind the pectoral fin, black. Almost as numerous in northern latitudes as the Cod, but less esteemed. [When the Haddock is taken in deep and clear water, it is perhaps the most delicate, and at the same time the most savoury of the whole family; but it does not take salt so wellas Cod.] G.callarius, the Dorse, spotted like the Cod, but smaller, and with the upper jaw longest. It is much esteemed in the north, when eaten fresh. [Besides these, there are various sub-species, or varieties, of all the three kinds, some of them found on the British shores. ] Merlangus, the Whiting, with the same fins as Cod, but no cirri. Of these, G. merlangus, the Whiting, is well known from its abundance, and the lightness of its flesh. It is pale, reddish grey above, silvery below, has a Jong upper jaw, and is about a foot in length. G. carbonarius, the Coal-fish, twice the size of the Whiting, blackish brown, with the upper jaw short, and the lateral line straight. The flesh of the full-grown one is coarse and tough, but it takes salt like Cod. G. polachius, the Pollock, jaws like the Coal-fish, brown above, spotted on the flanks, and silvery below. It is abundant in the Atlantic; and better than the Coal-fish, but inferior to the Whiting. Merluccius, the Hake, with only two dorsals, one anal, and no cirri, sometimes exceeds two feet; the back brownish grey, the first dorsal pomted, and the lower jaw longest. It is a coarse fish, but captured in great numbers, and salted. There are some species in high southern latitudes. Lota, the Ling (which means the Long Fish), has two dorsals, one anal, and some cirri at the mouth. G.molva, from three to four feet long, olive above, silvery beneath, dorsals equally high, lower jaw a little shorter than the upper, and with a cirrus. This species salts well, and is not inferior to Cod: hence it is a very valuable object in the fisheries. G. lota, the Burbot, from one to two feet long, yellow mottled with brown, dorsals of equal height, and one cirrus; head slightly depressed, and body cylindrical. It ascends rivers, and its flesh and flavour are highly esteemed. [The livers of most of the family are large, and turnish a great deal of oil, highly valuable in the dress- ing of leather, and other operations of the arts.] F Motella, the Rockling. Body lengthened, first dorsal scareely perceptible, second and anal very long, and three or more cirri. M. vulgaris, the Three-bearded Rockling, has two cirri on the nose, and one on the lower jaw. It is fawn-coloured, with brown spots. MM. quinquecirrata, the Five-bearded, has four cirri on the upper part, and one on the chin. It is dark-brown on the upper part, and seldom attains any considerable size. M. glauca, the Mackarel Midge, is about an inch and a quarter long, bluish-green on the upper part, and silvery below, and on the fins. M. argenteola, the Silvery Gade, is also a small fish, with three cirri, and coloured nearly like the former. Brosmius, the Torsk, is a northern species, with a long body, a dorsal along the whole back, one barbule on the under jaw, and the ventrals fleshy. It grows to the largest size in its native north. Brotula, from the West Indian seas, with the dorsal, anal, and caudal, forming one fin, which ends in a point. Phycis, Fork-beard, have a single ray in each ventral, which is produced and forked. They have also a small barbule on the chin. There are one or two British species. Raniceps, the Tadpole Fish, has the head broad and depressed, and the first dorsal scarcely visible. Lepidoleprus, a separate genus, having some relation to the Cod. Their suborbitals are united with the nasal bone, and form a depressed muzzle, advancing before the mouth, which, however, retains its mobility. Head and body with hard spinous scales; the ventrals are a little on the throat; the pectorals of mean size; the first dorsal high; the second dorsal, anal, and caudal united; the jaws short; the teeth fine and short. They inhabit MALACOPTERYGII SUB-BRACHIATI. 395 deep water, and utter a grumbling sound when drawn up to the surface. Two species are known, inhabiting the depths of the Mediterranean and Atlantic. THE SECOND FAMILY OF THE MALACOPTERYGII SUB-BRACHIAT . PLEURONECTID# (the FLuat-Fisu, or FLounpeER Family). “These are all included in the great genus Pleuronectes, which have a character quite unique among vertebrated animals: this consists in the want of symmetry in the head. [An animal is said to be sym- metrical when it is supposed to be divided in a mesial plane, or plane exactly along the middle, in a vertical direction,—the two sides being the exact counterparts of each other, and differing in nothing but in the one being turned to the right, and the other to the left.] These fishes have both eyes on one si le, and this side always remains uppermost when the animal is swimming, [while all other fishes swim on the belly.] The upper side is in general deeply coloured, while the other side is whitish. The body, from the head backwards, though formed nearly as usual, partakes a little of this peculiarity. The two sides of the mouth are not equal, and the pectoral fins are rarely so; the body is depressed, and elevated in the direction of the spinous processes; the dorsal extends along the whole back; the anal occupies the lower edge of the body, and the ventrals are sometimes united with it. [The fins are thus lateral fins, in respect of the swimming of the fish when in motion; and the action of the spine is vertical, in respect of that position, and not lateral, as in other fishes.] They have six gill- rays; the abdominal cavity is small, but extends in a cavity imbedded in the flesh on the two sides of the tail, for the purpose of containing some of the viscera; they have no air-bladder, and they seldom rise far from the bottom. Notwithstanding the peculiarity of the cranium, by that twist of the neck which brings both eyes to one side, the bones are the same as in other families, but very differently proportioned. They are found along the shores of almost all countries; and are, generally speaking, wholesome and agreeable eating. Some individuals have the eyes placed in the opposite side to that in which they are generally found in their species, and these are said to be reversed. Others have both sides coloured alike, in which case they are called “ Doubles.” It is usually the coloured side which is doubled, though occasionally it is the white one. They are subdivided as follows P. platessa, Plaice, have a row of sharp teeth in each jaw, and very often pavement-teeth in the pharynx; the dorsal does not advance more forwards than the upper eye, and both it and the anal terminate and leave smooth spaces before the base of the caudal; they generally have two or three small ceca, and six gill-rays. P. vulgaris, Common Plaice, has six or seven tubercles, forming a line between the eyes, and spots of Aurora red over the brown on the upper side of the body. The height is but a third of the length; and the flesh is soft, and soon de- composes. P. flesus, the Flounder, similar, but with the spots lighter; some tubercles on the head, and some on the base of the dorsal and anal fins; and have rough scales on the lateral line. They ascend a considerable way up rivers, and reversed individuals are not unfrequently caught. P. limanda, the Dab, has the eyes large, the lateral line curved above the pectoral, the scales rough, and the upper side brown, with whitish spots. P. mi- crocephalus, the Laminder, with the eyes smaller, nearer each other, and the back finely mottled with brown and yellow. [Both these are found in the salt water, as is also P. leminoides, the Long, or Rough Dab, which has the body elongated, something like a saw, and it approaches that species and quality. P. pola, the Crayed Fluke, has the head small, the right eye considerably in advance of the left, with the body yellowish-brown, and the fins darker. [All these, and some other species, are found on the British shores, chiefly on muddy or sandy bottoms. ] Hippoglosus, the Halibut. Shape and fins like a Flounder, lateral line arched, attains the length of six or seven feet in the northern seas, and weighs from three to four hundred pounds. Its flesh is rather coarse and dry, but it admits of being salted. There are several small species in the Mediterranean, some of which have the eyes on the left side, [whereas all the others hitherto noticed have them on the right side, unless when understood to be reversed ;] and one is oblong, with a straight lateral line, and large scales. Rhombus, the Turbotgenus. Teeth as in the Halibut, but the dorsal advances in front of the eyes, and the anal comes to the edge of the jaws. The eyes are generally on the left, and in some they are separated by a low crest. R. maximus, the Turbot, is the most esteemed of the family. Its height is nearly equal to its length, its form a truncated rhombus, and with the lateral line much arched. The upper or left side is brown, and beset with tubercles ; but reversed specimens are sometimes taken. R. vulgaris, Brill, is rounded on the sides, has the body without tubercles, and the first rays of the dorsal split into filaments. The eyes are usually on the left side. It is not so much esteemed as Turbot, still it is a good fish. R. hirtus, Topknot: mouth small, almost vertical; teeth distinct and sharp; colour reddish-brown, mottled with black, with a large spot on the lateral line near the tail, but not so conspicuous as in one other species, which has the body turned the other way, or the eyes on the right side, and the lateral line nearly straight. R. megastoma, the Whiff: body oblong, mouth wide, lateral line nearly straight, upper colour brown: it is not muchesteemed. R. arnoglossum, the Scarlet Fish: oblong, eyes to the left, fin-rays extending beyond the membrane, and of a yellowish-brown colour, wa 2 324 PISCES. Solea, the Sole. Eyes on the right, mouth twisted in the opposite direction, and with teeth only in the sides oppo- site to the eyes; form obiong; snout rounded, generally in advance of the mouth; dorsal and anal margining all the sides of the body. S. vulgaris, the Common Sole, is dark-brown on the upper part, with a strong skin and small scales, and white onthe under. S. pegusa, the Lemon Sole, is paler in colour, and wider and thicker than the Common Sole. All the Soles are excellent fishes, and may be had in good condition nearly all the year. Menochirus, resembles the Sole, but has only one small pectoral on the same side with the eyes, which is the right side in all the Soles. The Variegated Sole of the Mediterranean—occasionally found on the British coast—is an example. Achirus, are Soles entirely without pectoral fins, some having the ventrals distinct, and others having them united to the anal. THE THIRD FAMILY OF THE MALACOPTERYGII SUB-BRACHIATI. Discopoxt (Fishes with the ventrals formed into a Sucker, or Disc). The disc formed by the ventrals is the family characteristic, and they consist of two genera, both of which have the power of attaching themselves to rocks and other hard substances, by means of the disc, and thus they are capable of remaining in situations where otherwise the current of the water would carry them away. [This curious property enables these fishes to remain and find their food in situations where every other species of fish would be swept away by the current of the water. ] Lepidogaster.—These small fishes have large pectorals reaching to the under-side of the body, where they consist of stouter rays, incline forwards, and unite with each other by a transverse membrane directed forwards under the throat, and composed of the united ventral fins. Body without scales ; head broad and depressed; snout curved and protractile; gills with little opening, and four or five rays; only one soft dorsal opposite the anal, and both reaching to the base of the caudal. Intestines short, straight, and without cceca. They have no air-bladder, but they swim briskly. There are two subgenera :— Lepidogaster, properly so called, have the membranes representing the ventrals extended to one complete disc; and behind this, another disc, formed by the united pectorals. Some have the dorsal and anal united to the caudal, and others not. [There are several British species found on the south and west coasts; but they are small, and of no interest, except to naturalists. ] Gobiesox, have the dise entire, but with a cleft on the sides, and the membrane produced; the gill-opening wider, and the dorsal and caudal smaller, and separated from the anal. [Of this there is one small British species, not above an inch and a half in length, bright red above, and paler below. The sucker adheres readily to any wet surface, but not to a dry one.] Cyclopterus.—Rays of the ventrals suspended round the pelvis, united by a single membrane, and forming the disc; mouth wide; small pointed teeth in the jaws and pharynx; gill-lid small, and opening close below; six gill-rays; pectorals large, almost meeting under the throat, so as to surround the disc there, but forming no part of it. Their bones are soft; skin naked and mucous, but studded with hard granulations ; stomach large, and with numerous cceca; intestine long; air-bladder moderate. There are two subgenera :— Lumpus, have the first dorsal more or less visible, but with simple rays; the second opposite the anal, with branchial rays; the body is thick. [The Lump-fish is found in the British seas, and as far north of them as the margin of the polar ice. When in good condition for the table, it is red, or rather various shades of blue, purple, and reddish orange; but when out of season, it fades to a dull blue. It attains considerable size, and is a high and thick fish,—the height being about half the length, and the thickness half the height.] Leparus, with a single dorsal, and this and the anal both long; the body long, and compressed towards the tail. (There are one or two British species, some of which are called ‘‘ Snail-fishes,” from their soft and unctuous texture, and the readiness with which they adhere to rocks. ] Echeneis. This genus, like Pleuronectes, might form a distinct family of Sub-brachial Malacopterygii. They have a disc on the head, formed of cartilaginous lamine, ranged transversely or obliquely backwards, and with teeth or spines on their posterior edge. These are moveable, so that by means of them the fish can attach itself firmly to a rock, the bottom of a ship, or any other substance; and it is owing to this that it used to be alleged that these fishes could at once arrest the course of the swiftest vessel. Body long and scaly, a small dorsal oppo- site the anal, top of the head flat, lower jaw projectile, teeth small, tongue and vomer rough, eight gill-rays, large stomach, short intestine, six or eight cceca, and no air-bladder. This species are not numerous, and they inhabit generally the warmer seas. [E. remora, the Common Sucking-fish, is abundant in the Mediterrancan; and has been met with as a straggler on the British shores,—Dr. Turton having found one riding on the back of a Cod- fish, at Swansea, in 1806. The West Indian species are larger. ] MALACOPTERYGII APODA. 325 THE FOURTH ORDER OF BONY FISHES. MALACOPTERYGII APODA. The fishes in which ventral fins are always wanting, form but one natural family. Murenide, or Eel-shaped Fishes, which are lengthened in form, have the skin thick and soft, the scales almost invisible, and but few bones. They have no ceca, but almost all have air-bladders, often singularly shaped. The genus Murena is easily known by small opercule, surrounded by concentric rays buried in the skin, and opening only by a hole at some distance backwards, which arrangement, by protecting the gills, enables these fishes to live long out of the water, [and crawl for some distance over-land, when such a journey is necessary.] Body long and slender, scales visible only on the dried skin, no ventrals or cceca, and the vent far backwards. This extensive genus may be subdivided as follows :— Anguilla, known by the pectoral fins, and the gill-openings under them; stomach a lony cul-de-sac, intestine straight, and a peculiar gland near the middle of the long air-bladder. They are again subdivided :—Anguilla, the true Eels, have the dorsal and caudal meeting at the extremity of the tail, and forming a point, and the dorsal beginning a considerable way behind the pectorals. [They have also a singular pulsatory apparatus for the circu- lation of lymph, situated near the extremity of the tail. They are, strictly speaking, fresh-water fishes; but they migrate to the sea in the end of the season, bury themselves in the sludge there, and mature their spawn, again ascending the rivers for the purpose of spawning. Like Trout, they are much affected in appearance and quality by the waters which they inhabit. Three species are known as British Eels :—Acutirostrus, the Sharp-nosed Eel; Latirostrus, the Broad-nosed Eel; and Mediorostrus, the Snigg Eel. Eels are delicate fishes, and not found in very high latitudes. In Britain they are most abundant, and best in quality in the pure rivers which rise in the chalk districts.] Conger.—Dorsal commencing near or at the pectorals, and upper jaw longest. The Conger is found in most European seas; and is sometimes from four to six feet long, and as thick asa man’s leg. The margins of the dorsal and anal are black, and the lateral line marked with white spots. C. myrus of the Mediterranean is smaller than the Conger, and has whitish spots on the snout and the occiput. In some foreign ones, the dorsal begins before the pectorals. Ophisurus, Snake Eels, differ from the former in haying a portion of the extremity of the tail without fins, and ending in a pouch like the tail of a Serpent. O.serpens of the Mediterranean is brown above, silvery beneath, has the snout slender and pointed, grows to the length of six feet or more, and is as thick as a man’s arm. Some foreign species have the pectorals much smaller, which gives them a little the appearance of the genus,— Murena, which have no pectorals, very small gill-openings, gill-lids thin, and the rays not easily discernible ; the stomach short.; the air-bladder small, and placed in the upper part of the cavity. Some have one row of sharp teeth in each jaw, among which is,—M. helena, common in the Mediterranean, and much esteemed by the ancients, who carefully fed it in ponds. The story of Vedius Pollio, who caused his offending slaves to be flung alive into the ponds to feed the Murene, is well known. They grow to the length of three feet or more, are mottled brown and yellow, and very voracious and ugly. Others have two rows of sharp teeth in each jaw, and one on the vomer; and others, again, have round or conical teeth, as M. unicola of the Mediterranean, which appears uniformly brown, though marked with small lines and modellings. Cthers have two rows of teeth on the vomer, and a single one on the jaws; others, again, have two rows on the jaws, and four, like a pavement, on the vomer; and others still have several rows of card-teeth, as M. saga, with long, round, and pointed jaws, and the tail ending in a very sharp point. Sphagebranchus, have the gill-openings near each other below, the fins apparent only near the tail, and the snout long and pointed. Some want pectorals, others have mere vestiges, and others still are totally finless. Monopteras, have the gill-openings united, but with a partition; the dorsal and anal apparent only from the middle of the tail backwards; card-teeth on the jaws and palate ; six gill-rays, and only three very small gill-arches. The known species is from the Moluccas, and it is green above and fawn-coloured below. Synbranchus.—Gill-opening entirely single, no pectorals, fins fatty, head thick, snout rounded, operculum carti- laginous, with six rays, stomach and anal perfectly straight, and bladder long and narrow. Found in the seas of hot countries. Alabes, have one gill-opening; pectorals well marked, with a disc between them; gill-lids small, with three rays ; teeth pointed ; and intestines as in the last. The well-known species inhabits the Indian Ocean. Here should be placed a recently-discovered fish, one of the most singular of the whole class, namely :— Saccopharynx, which can inflate the thorax to a large tube, which terminates in a very long and slender tail, with long upper and under fins meeting at the point. Teeth sharp, mouth opening behind the eyes, which are very near the point of the snout, and gill-opening a smali hole under the pectorals. Grows large, and appears to be voracious ; but only a few specimens have been seen floating in the Atlantic, by means of the inflation of the thorax. Gymnotus.—Gills partially covered by membranes, but opening before the pectorals; vent far forwards ; anal fin occupying the under line of the body, generally to the extremity of the tail, but no dorsal. They admit of subdivision :— 326 PISCES. Gymnotus, the true Electric Eels, have no caudal or dorsal fin, nor visible scales; moderate intestines, with several fiexures, and numerous cceca; stomach short, and plaited on its inner surface. One long air-bladder extends in a cavity of the abdomen; the other, in two lobes, is placed over the gullet. Found only in the rivers and stagnant fresh waters of tropical America; and the most celebrated is,— G. electricus, the Electric Gymnotus, called from its form the Electric Eel. It attains the length of five or six feet, and communicates shocks so powerful that men and horses have been stunned by them. This power is voluntary, and can be sent ina particular direction, and even through the water, the fish in which are killed, or stunned, by its shocks. By giving these, it is greatly exhausted, and requires both rest and nourishment before it can renew them. The immediate organ of this power extends along the whole under-side of the tail, occupying about half its thickness. It consists of two large longitudinal fasciculi above, and two smalier ones below, resting on the base of the anal fin. Each fasciculus is composed of numerous parallel membranes, nearly horizontal, and close to each other, one end being attached to the skin, and the other to the mesial plane. They are joined by numerous transverse and vertical membranes; and the canals and cells thus formed are filled with gelatinous matter. The whole apparatus is largely supplied with nerves, [affording one striking instance of the intimate connexion between electric or galvanic action in matter, and nervous action in living animals.] Carapus, has the body compressed and scaly, and the tailmuch narrowed. They live in the South American rivers. Stenarchus, have the anal separated from the tail, and a caudal,—a soft filament along the back, lodged ina groove, in which it is retained by tendinous threads, and reaching the whole way to the tail. It has some freedom of motion, but the use of it isnot known. The head is oblique, compressed, and naked, with the skin hiding the operculum and gill-rays ; the body scaly ; the teeth small and crowded, and scarcely discernible in the middle of the jaw. Like the rest of the genus, they inhabit the waters of South America. Gymnarchus.—Body long and scaly; gill-opening before the pectorals; a soft-rayed fin along the back, but no anal, and the tail ending in a point ; head naked and conical; mouth small, and with a single row of cutting-teeth. G. niloticus, the only known species, inhabits the Nile. Leptocephalus.—Gill-opening before the pectorals ; body compressed and ribbon-like; head very small; snout short, and a little pointed; pectorals nearly or totally wanting; dorsal and anal obscure, but extending to the point of the tail; the viscera occupying a small cavity along the under-part of the body. One species is found in the British seas. L. morrissii, the Anglesey Morris, is a very little fish, silvery, and semi-transparent, but with bright and prominent rays, and is very lively in its motions. It lurks in sea-weed; and is one of those animals, exceedingly rare among Vertebrata, of which the internal structure can be seen without dissection, and its action understood accordingly. Other species have been found in the warm seas. Ophidium, resembles the Eels in having the vent far backwards, and the dorsal and anal meeting at the point of the tail; and the body is so long and compressed, that the fish has been compared to a sword-blade. The skin has minute and buried scales, as in the Eels, but the gill-openings are large, and the gill-lids have free motion; the dorsal rays are joined, not branched; some have small barbules, others none, and some short cirri; some are flesh-coloured, with black fins ; some brown, and some large ones are rose-colour, with brown spots. (The species without cirri, the O, imberbis of Linneus, has been made a subgenus by Cuvier, under the name of Fierasfer, in which the dorsal seems a mere fold of the skin. A specimen, about three inches long, has been met with on the south coast of England]. Ammodytes, have the body like the former, a fin with simple-jointed rays along the back, an anal fin, and a forked caudal, and the fins are not united; snout sharp; upper jaw extensile, and shorter than the lower in the closed mouth ; stomach fleshy and pointed; no cceca, or air-bladder. They burrow in the sand, and are captured by digging it at low water; and are understood to contribute materially to the support of Salmon in the estuaries. There are two species :—A. tobianus, the Sand-eel; and A. lancea, the Sand-lance. ‘The latter is thicker in the body than the former, with the intermaxillaries larger, and the dorsal commencing farther forward. They are both found on the sandy shores of Britain. THE FIFTH ORDER OF BONY FISHES. LOPHOBRANCHII (FISHES WITH THEIR GILLS IN TUFTS). All the fishes of the preceding four orders not only have a skeleton of fibrous bones, and the jaws complete and free, but their gills are always in fibres or fringes, like the teeth of a comb; but those of the present order, while they have the jaws complete and free, have the gills not in equal laminz along the arches, but in small round tufts, disposed along the arches im pairs,—-a structure of which there is no instance in other fishes. These are defended by a large operculum, attached by membranes on all sides, except one small hole for allowing the water to escape; and mere vestiges of rays are shown in the substance of the operculum. These fishes are also distinguished by shields or small plates, which cover the body, and often give it an angular form. In general, they are of small size, and almost without flesh. Their a LOPHOBRANCHIL. 327 intestine is of uniform width, and without ecceca; and their air-bladder, though slender, is large in proportion to their size. They form two genera; and the first admits of subdivision. Syngnathus.—These are characterized by a tubular snout, composed, as in the Fistularide, of pro- longations of the ethmoid, vomer, temporals, pre-operculum, and other bones; and this snout ends in a mouth as in other fishes, only its opening is nearly vertical. The gill-opening is near the nape; and there are no ventral fins. In their reproduction there is this peculiarity, that the eggs slide into a pouch formed by an inflation of the skin, and remain there till they are hatched. This pouch is under the belly in some, and at the base of the tail in others. It bursts spontaneously, and allows the fry to escape. [Thus these fishes have some analogy to the marsupial Mammalia. ] Syngnathus, the Pipe-fishes, properly so called, have a very long and slender body, differing little in diameter throughout its entire length. Some have a dorsal, caudal, and anal; others want the anal only, and in these the hatching-pouch is situated under the tail. S. acus, the Great Pipe-fish, and S. ty/phe, the Peak-nosed Pipe-fish, both found in the British Seas, belong to these sections. Others, again, have neither anal nor pectorals; and others no fin but the dorsal. S. ophidion, the Snake Pipe-fish, and S. lwmbriciformis, the Worm Pipe-fish, are British fishes belonging to these sections. ['They have the pouch under the belly ; and it is to be observed that in all the species it is the male, and not the female, which has the pouch, and hatches the eggs. ] ‘ Hippocampus, has the body compressed laterally, and much more elevated than the tail; and in dead speci- mens the neck bends, and the upper part has a faint resemblance to the head and neck of a Horse in miniature, from which they have been called Sea-horses. The margins of their scales are formed into ridges, and the angles into spines. They have no fin in the tail, but that organ is prehensile, and enables them to climb or hold on by the stalks of marine plants. The common species is found in the British seas, and is sometims about five inches long; and, on the coast of Australia, there is a longer one, with the angles of the scales extended into leafy appendages. Solenostomus, differ from the former chiefly in having, behind the pectorals, large ventrals united with each other and with the body, and forming an apron which serves to retain the eggs while hatching, in the same manner as the pouch of the Pipe-fishes. There is one dorsal of few rays near the nape, a very small one near the tail, and a large pointed caudal, but otherwise they resemble Hippocampus. ‘The only known species is from the Indian Ocean. + Pegasus, have a snout as in the former, but the mouth under it, and moveable, like that of a Sturgeon, only composed of the same bones as in other osseous fishes. The body is armed as in Hippocampus, but their thorax is broad, depressed, and with the gill-openings in the sides. They have two distinct ventrals in rear of the pecto- rals, which are often large, and haye procured these fishes the name of Pegasus, or Flying Horses. The dorsal and anal fins are opposite each other, the abdominal cavity is wider and shorter than in Syngnathus, and the in- testine has two or three flexures. Some species are found in the Indian seas. THE SIXTH ORDER OF BONY FISHES. PLECTOGNATHI (FisHes witH SOLDERED JAWS). Though retaining many of the characters of the Bony Fishes, the members of this order re- semble the Cartilaginous ones, in the imperfect structure of the jaws, and the slow ossification of the skeleton; but still this skeleton is fibrous, and resembles that of the Bony Fishes. The chief characters are—the maxillary soldered to the side of the intermaxillary, which consti- tutes the jaw, and the connexion of the palatal arch with the cranium by an immoveable suture. Besides, the gill-lid and rays are concealed under the thick skin, with only a small opening, the ribs are mere rivets, and there are no true ventrals. The intestine is large, and without coeca; and the air-bladder is always ample. They admit of division, by the character of their teeth, ito two very natural families. THE FIRST FAMILY OF THE PLECTOGNATHI. GymnopontTEs (Fishes with naked Teeth). Instead of teeth, these have the jaws covered with a substance like ivory, laminated internally, and resembling the beak of a Parrot, though these are true teeth united, and are reproduced as soon as they are destroyed by using. Their gill-lids are small, with five obscure rays. They live on Crustacea and sea-weed, and their flesh is mucous, and not liked,—that of some species being reckoned poisonous, at east at certain seasons of the year. 328 PISUES., The genera Tetraodon ana vrodon have the faculty of blowing themselves up like balloons, by filling with air a thin and extensile membranous sac, which adheres to the peritoneum the whole length of the abdomen. When thus inflated, they roll over and float with the belly uppermost, without any power of directing their course; but they are remarkably well defended by spines all over the surface, which are erected as they are inflated. Their air-bladder has two lobes. They have but three gill- arches in a side; and when taken, the escape of the air from the pouch makes a sound. Each nostril is furnished with a double fleshy tentaculum, Diodon, Spinous Globe-fishes, get the generic name from the jaws consisting of only two pieces, one above and the other below. Behind the trenchant edge of each piece, there is a rounded portion furrowed across, and forming a powerful grinding apparatus. The spines upon the inflated skin, which vary a good deal in the dif- ferent species, present a formidable appearance. They inhabit the warm seas; but sometimes, though rarely, a specimen, brought no doubt by the Atlantic current, is found on the coast of Cornwall. Tetraodon, have each jaw marked with a suture, so as to give the appearance of four teeth. The spines are small and low, and some species are reckoned poisonous. None of them is recorded as visiting Britain. One is electrical, 7’. dineatus, straight, brown and whitish: it is found in the Nile, cast on shore by the inundations, and collected by the children as a plaything. Orthagoriscus, the Sun-fish, has the body compressed, spineless, and incapable of inflation, with the tail so short that it appears only the anterior half of a fish which had been cut in two in the middle. Their dorsal and anal, both high and pointed, are united to the caudal; no air-bladder, and the stomach is small; their surface is covered with mucus. They are found in many seas; and two species at least—O. mola, the Short Sun-fish, and O. oblongus, the Oblong Sun-fish—are found in the British seas. Triodon.—These species have the mark of a suture on the upper jaw, but none on the under, which gives them the appearance of having three teeth. A vast membrane, as long as the body, and twice as high, is supported before by a large bone answering to the pelvis, and makes these fishes resemble Balistes, in the following family. Tins as in Diodon, body rough like Tetraodon, and the surface of the membrane roughened by a number of littie oblique crests. ‘The only known species is from the Indian Ocean. THE SECOND FAMILY OF THE PLECTOGNATHI. Scituropermi (Fishes with Hard or Granulated Skins). These are readily distinguished by a conical or pyramidical muzzle, which is prolonged forwards from the eyes, and-terminates in the mouth, with distinct teeth in both jaws. The skin is either rough or covered with very hard scales; and the air-bladder is large, strong, and of an oval shape. There are two genera. Balisfes, File-fishes, admit of subdivision, and have the body compressed; eight teeth, generally trenchant, in a single row in each jaw; the skins scaly or granulated, but not osseous; the first dorsal composed of one or more spines, articulated with a particular bone, which is attached to the cranium, where is a groove for its reception; the second dorsal and anal long, and placed opposite each other. Though without ventral fins, they have pelvic bones attached to the shoulders. They abound in the warm seas near rocks, or on the surface of the water; and their brilliant colours sparkle in the water like those of Chetodons. Their flesh is disliked at all times; and they are supposed to feed on Coralline Polypi at some seasons, and become poisonous, but Cuvier found only sea-weed in such as he opened. Balistes proper, have the whole body covered with long and hard rhomboidal scales, which do not overlap each other, but have the appearance of the teeth ofa file; three spines on the dorsal, the first long, the third small and far back; extremity of the chest salient and prickly, with some spines in the skin behind, which have been con- sidered as rays of ventral fins. Some have no particular armature of the tail; and of these, again, some have large scales behind the gill-openings. Such is the Kuropean File-fish—B. capriscus, which has been occasionally, but very rarely, found on the British shores, and which is com- mon in the Mediterranean. Monacanthus.—This subgenus has very small scales, set rough like the pile of velvet ; a large cirrated spine on the first dorsal, and the extremity of the pelvis salient and spinous. Some have the pelvic bone moveable, and con- nected with the abdomen by an extensile membrane, and frequently strong spines on the sides of the tail. Some have stout bristles on the tail, some have the body with tuber- cles, and others with branched hairs. Fig. }441.—Balistes pencilligerns. PLECTOGNATHI. 329 Aluteres, have the body long, the granulations scarcely visible, and a single spine in the first dorsal, but the pelvis is completely hidden in the skin. Triacanthus, has a kind of ventrals, each sup- ported by one large spinous ray, adhering to a non- projecting pelvis; the first dorsal has one largish spine, and three smaller ones behind it; the body is crowded with small scales; and the tail is longer than in any of the other subgenera. The single known species inhabits the Indian Ocean. Ostracion, the Trunk-fish, has the head and body covered in such a manner with plates of bones, soldered together, as to form an inflexible cuirass, leaving only the tail, the fins, the mouth, and a small margin of the gill-opening, capable of mo- : tion,—all of which moveable parts pass through Fig. 145.—Balistes geographicus. openings of the cuirass. The greater part of the vertebre are also soldered together. The jaws are furnished with a row of ten or twelve conical teeth; and they have no apparent gill-opening, except a mere slit with a cutaneous lobe; but inside the skin they have a gill-lid and six rays. They have neither pelvic bone nor ventrals, and the single dorsal and anal are both small: they have little flesh, but the liver is large, and abounds in oil; the stomach is also very large and membranous. Some of them are thought to be poisonous. They might be subdivided according to the form of the body and the spines, but it is not yet ascertained whether there may not be sexual differences in these respects. [The body is triangular in some, quadrangular in others, and in some it is compressed; and the appearance of the cuirass, or covering, varies still more. None has been met with on the British shores. ] CHONDROPTERYGII. The second series of Fishes, the CaonpropreryGu, or Cartilaginous Fishes, cannot be considered either superior or inferior to the Ordinary Fishes ; for, while some of the genera resemble Reptiles in the structure of their ear and reproductive organs, other genera have the skeleton so very rudimental that one almost hesitates to regard them as vertebrated animals. They form a series, ranging parallel to the Bony Fishes, just as the Marsupial Mammalia range parallel with the other ordinary Mammalia. Essentially, the skeleton is cartilaginous,—that is to say, it has no bony fibres, but the calcareous matter is disposed in grains. The cranium is always formed of a single piece without sutures; but there are ridges, furrows, and holes, whereby the por- tions of it analogous to the cranial bones of other fishes mzy be distinguished. Even the moveable articulations of other orders are not distinguishable in the whole of this: as, for instance, part of the vertebree of some of the rays make a single piece, and some articulations of the bones of the face also disappear. Among the latter, the most prominent character is the reduction of the maxillaries and intermaxillaries to mere rudiments concealed under the skin, while their functions are performed by the palatals, and sometimes by the vomer. The gelatinous substance which fills the intervals of the vertebrz in other fishes, and communicates from one to another by only a small hole, is, in several of this order, a long cord, which traverses all the vertebre, with little variation of diameter. The series divides itself into two orders:—Those with free gills, like all other Fishes ; and those with fixed gills, which are so attached to the skin by the internal edges that the water cannot escape from their intervals, except by holes in the surface. 330 PISCES. THE FIRST ORDER OF CHONDROPTERYGIL— CHONDROPTERYGI BRANCHHS LIBERIS,— (Or, with free gills), have m their gills a single wide opening, and a gill-lid, like the Bony Fishes, but they have no gill-rays. There are two genera. Accipenser, the Sturgeon.—General form like that of the Shark, but the body more or less covered with bony plates in longitudinal rows, and the head externally armed with the same. Their mouth, placed under the muzzle, is small and toothless; and the palatal bones, soldered to the maxillaries, form the upper jaw, while there are vestiges of the in- termaxillaries in the thick lips. Piaced upon a pedicle of three articulations, this mouth is more protractile than that of the Shark; the eyes and nostrils are on the sides of the head, and barbules are suspended from the muzzle; the labyrinth within the cranial bones is perfect, but there is no external ear—the hole behind the temple leading merely to the gills. The dorsal is behind the ventrals, and has the anal directly opposite to it; the caudal surrounds the extremity of the spine, and terminates in the upper lobe of the tail, but an under lobe gives the tail the appearance of being forked. Internally, we find the spiral intestinal valve, and the single pancreas of the Shark family; and there is a very large air-bladder, which communicates with the gullet by a large opening. Sturgeons ascend some rivers in vast numbers, and are the object of valuable fisheries. The flesh of most is agreeable, their eggs or roes are made into caviar, and their air-bladders furnish the finest isinglass. Fig. 146.—The Sturgeon. A. sturio, the Common Sturgeon, occasionally found in the west of Europe and on the British shores, is about six feet long, has a pointed muzzle, five rows of plates with strong spines, and its flesh is much esteemed, being somewhat like veal. The rivers falling into the Black and Caspian Seas produce this and three other species, if not more. A. ruthenus, the Sterlet, is seldom more than two feet long, with the plates on the lateral line numerous and keeled, and those in the belly flat. It is considered delicious, and caviar made from it is reserved for the Russian court. There is reason to believe that this is the Hlops and Accipenser so much celebrated by the ancients. A. stelatus, the seroregia of the Russians, and the scherg of the Germans, grows to the length of four feet, has the plaits rougher and the snout more slender than the others. It is very numerous, but less esteemed than the Common Sturgeon. A. huso, the Great Sturgeon, has blunter plates, a smoother skin, and shorter snout and cirri, than the Common Sturgeon. It is frequentiy found more than twelve, or even fifteen, feet inlength, and weighing more than twelve hundred pounds. One specimen is mentioned which weighed near 3,000 pounds. Its flesh is not much esteemed, and it issometimes unwholesome; but its air-bladder yields the very finest isinglass. It is found in the Po as well as in the northern rivers. Several Sturgeons are found in North America, which are peculiar to that quarter of the world. Poliodon, may be considered as a subgenus of Accipenser. These fishes are distinguished by the great prolong- ation of their snout, the broad margins of which give it the figure of aleaf. In the general form and fins they re- semble the Sturgeons; but their gill-openings are wider, and the gill-lid is prolonged in a membranous flap, which extends to half the length of the body; their gape is much cleft, and furnished with a number of small teeth. Their upper jaw is formed by the union of the palatals and maxillaries with a pedicle of two articulations. There is a spinal cord like that in the Lamprey, and the same spiral valve which is common to most of the order; but the pancreas is partially divided into ceca. ‘They are furnished with an air-bladder. Only a single species is known, P. folium, which is found in the Mississippi. Chimera.—This second genus of cartilaginous fishes with free gills, closely resembles the Sharks in form, and in the disposition of the fins; but the gills open externally by one apparent hole in each side, though, if we examine more closely, we find great part of their edges attached, and that there are five separate holes terminating in the common aperture: still they have a vestige of an operculum concealed in the skin. Their jaws are more reduced than in the Sharks, for the palatals and tempo- rals are mere simple vestiges suspended to the sides of the muzzle, and the upper jaw is represented by the vomer only: hard and undivided plates supply the place of teeth, four of them above, and two below. The muzzle, supported as in the Sharks, projects forwards, and has pores arranged in rows nearly CHONDROPTERYGIT BRANCHIIS LIBERIS. 331 regular. The first dorsal, containing a strong spine, is placed over the pectorals; and the males, as in the Sharks, have a bony appendage to the ventrals ; but these are divided into three branches, and they have spinous appendages before the base of the ventrals, and small spines on the point of a fleshy appendage between the eyes. Their eggs are large and flattened, with a leathery covering, and having margins. [In fact, with some singular peculiarities, they approach pretty closely to the fishes with fixed gills. ] C. monstrosa, the King of the Herrings, and Cat of the Mediterranean, is three feet long, and of a silvery colour spotted with brown. It inhabits the European seas, the northerly ones most abundantly. Another, forming, perhaps, a second subgenus, Callirhynchus, has the snout ending in a fleshy appendage like a toe. The second dorsal begins over the ventrals, and terminates at the commencement of the fin under the tail. Cnly one species, from the South Seas, is known. THE SECOND ORDER OF CHONDROPTERYGITI. CHONDROPTERYGII BRANCHIIS FIXIS. These have their gills attached at the outer edge, with a separate opening, through which the water from each gill escapes. They have also small arches of cartilage suspended in their muscles, opposite the gills, which may be called gill-ribs. They form two families. THE FIRST FAMILY OF THE CHONDROPTERYGIT BRANCHIIS FIXIS,— SELacui (the SHarxs and Rays),— Which has been comprised in two genera, has many common characters. The palatals and postmandi- bularies are alone armed with teeth, supplying the place of jaws, the usual bones of which are mere rudiments, a single bone representing the tympanal, jugal, and temporal bones, and the preoperculum. The os hyoides is attached to this pedicle, and supports gill-rays as in ordinary fishes, although not distinctly visible externally. It is followed by branchial arches, but has none of the three pieces which compose the gill-lid. They have pectorals and ventrals, the latter behind the abdomen on each side of the vent. Their membranous labyrinth is inclosed in the cartilage of the cranium, and their cavities contain starchy masses and not stony ones. The pancreas is a conglomerate gland, and not divided into cceca; the intestinal canal is short, but with a spiral valve. The sexes pair regularly, the females having oviducts highly organized, which supply the place of a matrix in those that bring both their young alive ; such as produce eggs have them with a horny covering, the substance of which is supplied by a larger gland surrounding the oviduct. The males are easily known by large appendages on the inner edge of the ventrals, the use of which is not well known, [though believed to serve as claspers]. Squalus, the Sharks properly so called, have a long body; a thick, fleshy tail; moderate pectorals ; and resemble ordinary fishes in their form, having the gill-openings on the sides of the neck, not below, as in the Rays, and the eyes in the sides of the head. The snout is supported by three carti- laginous branches arising from the fore part of the cranium, and the rudiments of maxillaries, inter- maxillaries, and premandibulars, may be traced in the skeleton. The bone of the shoulder is sus- pended in the muscles behind the gills, without connexion with the cranium or the spinal column. Some are viviparous ; others produce eggs covered with yellow and transparent horn, of an oblong shape, and with cords of horn at the angles. Their small gill-ribs are apparent, and small ones are traceable along the spine; their flesh is dry and leathery, and eaten only by the poor. They are numerous, and form many subgenera. Scyllium (called Dog-fishes on the British coast).—Snout blunt and short ; nostrils near the mouth, continued in a groove to the edge of the lip, and more or less closed by membranes ; teeth with a long point in the middle, and a shorter one at each side. They all have spiracles, and one anal fin; the dorsals are far backward, the first being even before the ventrals ; their caudal is long and truncated, and their gill-openings under the pectorals in the British ones; the anal is against the interval between the two dorsals. The species are: S. canicula, the Small-spotted Dog-fish, with numerous spots and the ventrals truncated.—S. cutilis, the Large- spotted Dog-fish, with the spots larger, sometimes ocellated, and the ventrals square.—S. melastomum, Black- 332 PISCES. mouthed Dog-fish. Light-brown, with ocellated spots. All the three are peculiarly destructive to the more valuable fishes. Some foreign ones have a slight difference of character. The Sharks properly so called include all species with a produced snout, no nasal grooves, and with a caudal lobe more or less forked. They form the genus ee — Carcharias,—a numerous and notorious tribe, = .— with trenchant-pointed teeth, usually serrated in the margins; the first dorsal before the ventrals ; the second nearly opposite the anals. They have no spiracles ; the nostrils are in the middle of the snout, and the last gill-opening extends over the pectorals. C. vulgaris, the White Shark, is some- times twenty feet long, with isosceles-triangular teeth, ragged at the sides, and the lower ones narrow points placed on wider bases ; these teeth in the mouth of such a fish forming weapons dreaded by all mariners. Foundin most seas. [Its appear- ance on the British shores has been mentioned, but it wants authentication.} C. vulpes, the Fox- shark, or Thresher.—Triangular teeth in both jaws; upper lobe of the tail as long as the whole body ; second dorsal andanal very small. C. glau- cus, the Blue Shark, with curved-sided teeth above, inclining outwards, and straighter ones be- low ; all ragged on the edges. Lamna, the Porbeagle, differs from a true Shark in the pyramidal snout, and the gill openings before the pec- torals. ZL. cornubica occasionally appears on the British coast, and its size has caused it to be mis- taken for the White Shark. JZ. monensis resembles the last, but has the snout shorter. Galeus.—Shaped like the Sharks, but with spira- cles and an anal. G. vulgaris, the Tope, is found on the British shores. Mustelus, resembles the former in shape, but has the teeth like a close pavement. Milavis, the Smooth Hound, isa British species. Notidanus, wants the first dorsal; has six gill- openings, triangular teeth above, and like a Fig. 145 —The Thresher. saw below. Two species inhabit the Mediterranean. Has the form of the Sharks, and spiracles, with the gill- openings nearly surrounding the neck ; its teeth are smail and not notched. It is the largest of the True Fishes, being sometimes thirty-six feet long; but it is a harmless fish. S. maximus, the Basking Shark, is found in the British seas. Centracion, has spiral teeth like pavement, and a spine before each dorsal. Spinax, resembles Carcharias, but bas spiracles ; no anal fin ; several rows of small trenchant teeth ; and a strong spine before each dorsal. S. acantheus, the Piked Dog-fish, 1s a British species. Centrina, resembles the last; but the second dorsal over the ventrals, and the short tail, give it a clumsy appearance ; its skin is very rough. Scymnus, the Greenland Shark, is more abun- dant in the Arctic seas, and is large and vora- cious; but is understood not to attack Man. Zygena, forms a second genus. Like the Sharks in the body, but with the snout singu- larly produced, forming two pieces like a couble- headed hammer, with an eye in the middle of each extremity. The species of the European seas grow to the length of twelve feet, [and we believe larger ones are met with in southern latitudes]. Squatina, the Angel Fish, has spiracles and wants the anal; but it has the mouth at the end of the muzzle; the eyes in the upper part of the head; the head round; the body broad and flattened horizontally; the pectorals large and far forward, but separated from the back by a slit in the gill-openings; their two dorsals are behind the ventrals, and the caudal is attached both to the upper and under sides of the termination of the body, Fig. 147.— The White Shark. Fig 149.—The Hammer-he \ded Shark. CHONDROPTERYGIL BRANCHIIS FIXIS. 333 S. angelus, the Common Angel-fish, grows seven or eight feet long; is very voracious, and one of the ugliest of fishes. Pristis, the Saw-fish, form a fourth genus. They have a long body, like the Sharks, with the gill- Openings below; the snout extended like the blade of a sword, and with strong and trenchant teeth like spines on both edges. This formidable weapon gives name to the fishes, and with it they will attack the largest Whales, and inflict dreadful wounds. They sometimes attain twelve or fifteen Fig. 150.—The Saw-fish, feet in length. Raia, the Skate, [or rather, perhaps, Raiaide, the Skate family,] are less numerous than the Sharks. They have the body flattened till, from its union with the large and fleshy pectorals, it forms a disc. hese pectorals are joined to each cther before the snout; extend behind as far as the base of the ventrals, and have their humeral bones articulated with the spine behind the gills. Eyes and spiracles above ; mouth, nostrils, and gill-openings below; and dorsal fins almost always on the tail. Eggs brown, leathery, and square, with points at the angles. They consist of the following subgenera: Rhinobatis, connect the Sharks and Rays by their thick fleshy tail, and two distinct dorsals and a caudal. The rhomboids formed by the snout and pectorals is sharper in front and narrower than in the ordinary Rays ; but excepting this they have all the characters of these, and their crowded teeth are placed in fives, like little paving-stones. Some inhabit the Mediterranean ; some the Atlantic; and one species from Brazil is said, but not proved, to be electric. Rhina differs from Rhinobatis in having a stout, broad, and rounded snout. Torpedo.—Tail short, but tolerably fleshy ; disc of the body nearly circular, the anterior edge being formed by two productions of the muzzle, which extend outwards and join the pectorals. The space between the pectorals and the head and gills is filled by an electric apparatus. consisting of numerous cells formed like honeycombs, and subdivided by lateral diaphragms, in the intervals of which a mucous fluid is contained. This electric or galvanic apparatus is, like that in Gymnotus, amply supplied with nerves. The shocks given by the Torpedo, though smart, are not so benumbing as those of Gymnotus. They probably enable it to stun its prey. The body is smooth, and the teeth small and pointed. Two species, one with ocellated spots, and another with seyen fleshy protuberances round the spiracles, with the back marbled, sprinkled, or spotted with brown, were long confounded with this one. There are also several species in the foreign seas. The Common Torpedo is occasionally found on . the Channel coast of England. Raia, the Rays properly so called, or Skate, have the disc rhomboidal ; the tail slender; with two small dor- sals on the upper part, near the point, and sometimes the vestige of a caudal; and their teeth are small, and ranged in quincunx on the jaws. The European seas furnish many species, some of which are not yet well deter- mined. Their flesh is rather hard when recent, but wholesome. [The species found in the British seas are as follows: R. chagrinea, the Shagreen Ray; R. batis, the Blue or common Skate; R. oxyrhynchus, the Sharp- nosed Ray; R. marginata, the Margined Ray; R. maculata, the Homelin or Spotted Ray; R. microcellata, the Small-eyed Ray; R. clavata, the Thornback; and R. radiata, the Starry-ray.—Yarrell’s British Fishes.] Trygon, the Sting Ray, bas on the tail a strong spine notched on both sides; teeth similar to the other Rays; the disc obtuse forwards, and the tail often without any fin save arudimentalmembrane. R. acanthus resembles Trygon, but has the tail long and slender, without fin or spine. Miliobatis, the Eagle Ray, has the snout projecting beyond the long pectorals, which extend outwards like wings; the jaws have broad flat teeth like a pavement; the tail is long and slender, having a spine on the upper part near the base, and not far behind the small dorsal. In some there are two or more spines. Cephaloptera, has the small tail, the spine, and the small dorsal of the last subgenus: but the pectorals are more extended in proportion to the length of the body ; the head is truncated in front, and a lobe of each pectoral advances on each side of it, making the fish seem as if it had horns. THE SECOND FAMILY OF THE CHONDROPTERYGII BRANCHIIS FIXIS. CycLosTomata (with the Mouth formed into a Sucker). With respect to their skeleton these are the least perfect of fishes, and, indeed, of all vertebrated animals. They have no pectorals or ventrals ; their body ends ina circular fleshy lip, with a cartilaginous ring supporting it, and formed of the soldered palatals and mandibularies. The substance of all the vertebre is traversed by a single tendinous cord, filled internally with a mucilaginous fluid, without contractions and enlargements, which reduces the vertebra to cartilaginous rays not easily distinguish- able from each other. The annular portion is rather more solid than the rest, but not cartilaginous through its whole circle. They have no ordinary ribs, but the gill-ribs, noticed as rudimental in the Sharks and Rays, are more developed and united with each other in this family into a kind of cage, but there are no solid gill-arches. Instead of being comb-shaped, as in other fishes, the gills have the PISCES. appearance of sacs produced by the union of the faces of the proximate ones. The labyrinth of the ear is embedded in the cranium, and the nostrils opened by a single orifice, in front of which is a blind cavity, improperly thought a spiracle. The intestine is straight and slender, with a spiral valve. Petromyzon, the Lampreys, have seven gill-openings on each side, and the skin on the upper and under parts of the tail is formed into fin-like crests, which, however, haveno rays. The Lampreys properly so called, have strong teeth in the maxillary ring, and the inner disc of the lip, which is very circular, is covered with tubercles, hard and crusted like teeth: this ring is suspended by a transverse plate answering to the intermaxillaries, and there are vestiges of maxillaries on the sides. The tongue, which moves backwards and forwards like a piston, and performs the suction, has two longitudinal rows of small teeth. Water reaches the gills from the mouth by a particular membranous canal, a sort of trachea, placed under the gullet and perforated with holes; there is a dorsal before the vent, and another behind it which unites with the caudal. They habitually fix themselves to stones and other hard substances by means of the sucker ; and they attach themselves to the largest fishes in the same manner, and in the end pierce their integuments and prey upon their substance. The species are—P. marinus, the Sea Lamprey, two or three feet long, marbled with brown and a yellow ground; the first dorsal separate from the second ; two large teeth on the upper part of the maxillary range. Inspring they approach the mouth of rivers, and their flesh is highly esteemed. P. fluviabilis, the River Lamprey, from a foot to eighteen inches long ; silvery, with blackish or olive spots on the back ; two large teeth in the maxillary ring; found in the fresh waters. P. planerii, the Small River Lamprey, is eight or ten inches long, and has the colours and teeth of the preceding : it also inhabits the fresh waters. [The last two are often styled Lamperns. ] Myxine.—The members of this genus have but one tooth in the maxillary ring, which is entirely membranous ; two rows of strong teeth on each side of the tongue; but in other respects like the Lampreys. The mouth is circular, with eight cirri, and has a spiracle on the upper margin which reaches the interior. The body is cylin- drical, and furnished with one fin round the extremity of the tail. The intestine is straight, but simple, and plaited internally, and the liver has two lobes: no eyes are perceptible. Their eggs grow to a large size; they discharge 60 much mucus from the pores in their lateral line that if kept in a vessel of water they turn it into a jelly; they attack fishes in the same manner as the Lampreys, and they are divided into subgenera according to the number of their gill-openings. Heptratremus, has seven on each side, like the Lampreys, and the only known species is from the South Sea. Gastrobanchus, has a common canal to the gills on each side, each of which opens by a hole near the heart, and at one third of the length from the head. G. glutinosa, the Hag, is the only known species, and it enters the mouths of fishes when on the fishermen’s line, and plunders their substance. Ammocetes, has the entire skeleton so soft and membranous that there is not a bone in the whole, not even a tooth ; they have the external form and gill-openings of the Lampreys, but their fleshy lip forms only a semicircle on the upper part of the mouth, which ‘is furnished with numerous cirri. ‘The known species, 4. branchialis, is from six to eight inches long, about the thickness of a goose-quill, and of no use but as bait for other fish. [It has been accused of sucking the gills of other fishes, but perhaps falsely. It is found in the sand and mud of small streams; preys on worms, insects, and dead matter, and is, in return, preyed on by the Eel.] [Amphioxvus, has the body compressed, the surface without scales, and both ends pointed. It has a dorsal along the whole line of the back, but no other fins. The mouth is on the under side of the body, opens longitudi- nally, and has a row of filaments on each side. A. lanceolatus, the Lancelet, is the only known species. It is a British fish, and an inhabitant of the sea, in which it is found, although very rarely, lurking under stones in pools left by the ebbing tide. Pallas considered it as a molluscous animal, and not a fish; but Mr. Yarrell, in his British Fishes, argues that it is a fish, and that in organization it is the lowest of the class. ‘ The form of the fish,” says Mr. Yarrell, ‘‘is compressed; the head pointed, without any trace of eyes; the nose rather produced ; the mouth on the under edge, in the shape of an elongated fissure, the sides of which are flexible; from the inner margin'extend various slender filaments, which cross and intermingle with those on the opposite side. Along the sides of the body the muscles are arranged in regular order, diverging from a central line; one series passing obliquely upward and backward, and the other series as obliquely downward and backward ; the anal aperture is situated one-fourth of the length of the fish in advance of the end of the tail; the tail itself pointed; from the nose to the end of the tail, a delicate membranous dorsal fin extends the whole length of the back, supported by very numerous and minute soft rays; the surface of the bodysmooth.’? These characters leave no doubt that the animal is a fish; but that it ought to be classed with the Lamprey family is another matter. The specimen from which the description was made was not above an inch in length, very slender, and alm st transparent. ] SECOND GREAT DIVISION OF THE ANIMAL KINGDOM. THE MOLLUSCA. * Tue Mo ttusca have no articulated skeleton nor vertebral canal. Their nervous system does not unite in a spinal cord}, but merely in a certain number of medullary masses dispersed in different points of the body, the principal one of which, called the brain, is placed crosswise upon the gullet, encircling it with a nervous collar. Their organs of motion and of the senses have not the same uniformity in number and position as in the Vertebrated Animals; and the variety is still more striking with the viscera, particularly in relation to the position of the heart and respiratory organs, and even in the structure and nature of the latter; for some Mollusca breathe the free air, and others the fresh or salt water. In general, however, their external organs, and those of locomotion, are symmetrical on the opposite sides of a middle axis. The circulation of the Mollusca is always double,—that is to say, their pulmonary circulation always makes a separate and complete circuit; and this function is always aided by one fleshy ventricle at least, placed, not as in the Fishes, between the veins of the body and the arteries of the lung, but, on the contrary, between the veins of the lung and the arteries of the body. It is, consequently, an aortic ventricle. The family of Cephalopods alone is provided, besides, with a pulmonary ventricle, which is even divided into two. The aortic ventricle is also divided in some genera, of which the Arca and Lingula are examples : at other times, as in the remaining bivalves, its auricle only is divided. When there is more than one ventricle, they are not united together to form a single organ, as in animals with warm blood, but they are often placed considerably apart, so that we may say that then there are several hearts. The blood of the Mollusca is white, or bluish ; and the fibrine appears to be pro- portionally less abundant than in the blood of Vertebrated Animals. ‘There is reason to believe that their veins perform the functions of absorbent vessels. Their muscles are attached to different points of their skin, and form there tissues more or less complicated and close in texture. The motions of these tissues are limited to contractions in different directions, which produce inflexions and prolongations, or relaxations, of their different parts; by means of which the creatures creep, swim, and seize upon various objects, according as the forms of the parts are adapted to these movements ; but as their members are not sustained by jointed and solid levers, the Mollusca cannot make rapid springs. The irritability of the greater number of the Mollusca is very great, and is retained sition of the Linnean classification of avertebrated animals, and the theory, that the brain and spinal cord are the result of a union of also the modification of it proposed by Bruguiéres. Cuvier’s first the nerves, trending from the circumference to certain centres. The sketch of the arrangement now to be explained was made in May | opposite opinion was that maintained by Haller, and all the carlier 1795.—Ep. physiologists.—Ep,. * In the original, there is here a long note, containing an expo- | + From this mode of expression, we infer that Cuvier had adopted 336 MOLLUSCA. a long time in parts after they have been amputated. Their skin is naked, very sensi- tive, and, in general, bedewed with a humour, which oozes from its pores. No peculiar organ of smell has yet been discovered, although they enjoy that sense; and it may be that the entire skin is its seat, for this has much resemblance to a pituitary membrane. All the Acephales, the Brachiopods, the Cirrhopods, and some of the Gasteropods and Pteropods, are destitute of eyes; but the Cephalopods possess these organs, with a structure equal, at least, in complexity, to those of animals with warm blood. They also are the only Mollusca in which organs of hearing have been detected, and in which the brain is inclosed in a particular cartilaginous skull. Nearly all the Mollusca have a developement of the skin which covers the body, and resembles more or less a cloak, but which is often reduced into a simple disk, or is folded into a tube, or hollowed into a sac, or, lastly, extended and divided in the form of fins or swimmers. We call those Mollusca naked in which the cloak is simply membranous or fleshy ; but there is commonly formed within it one or several lamine of a more or less solid substance, which is deposited in layers, and increases at the same time in extent, as well as in thickness, because the recent layers always extend beyond the older ones. When this substance lies concealed in the cloak, common usage allows us to extend to the species so circumstanced, the title of naked Mollusca. But oftener that substance assumes such a size and developement that the animal can contract or withdraw under its shelter; we then give it the name of shell, and the animal is said to be festaceous. The skin which covers the shell is thin, and sometimes dried, or wanting: it is commonly called [by French naturalists], the drap-marin, [and by the English, and those who write in the Latin tongue, the epidermis].* The variety in the forms and colour, in the exterior sculpture, composition, and lustre of shells, is infinite. The greater number by far are calcareous ; there are some simply corneous; but all are formed of material deposited in layers, or exuded by the skin under the epidermis, as are the rete mucosum, the nails, the hair, the horns, the scales, and even the teeth. The texture of shells differs according as that exudation is made in parallel layers, or in vertical filaments arranged closely against each other. t The Mollusca present every kind of mastication and deglutition : their stomachs are sometimes simple, sometimes multiplicate, often furnished with peculiar armatures, and their intestines are variously elongated. They have, in general, salivary glands, and always a liver of considerable size, but no pancreas} nor mesentery. Several have secretions, which are peculiar to them. They exhibit, also, every variety of generation. Several fecundate themselves, while in others, although hermaphrodite, the union of two individuals is necessary to fe- cundation : in many the sexes are distinct and separate. Some are viviparous; others are Oviparous, and the eggs of these are sometimes enveloped in a more or less con- sistent shell, or sometimes only in a simple viscosity. These variations in digestion and generation are found in Mollusca of the same order, sometimes of the same family. The Mollusca, in general, seem to be animals of inferior developement: hebetous * Previous to my system, the Testacea were considered a peculiar + The student will find the formation of shells, and their structure, order; but the transitions from the naked to the shelled Mollusca are | admirably explained by Mr. Gray, ina paper, on the economy of Mol- so insensible, and their natural divisions are so interlaced, that this luscous animals, inserted in the Phil. Trans., 1833.—Ep. distinction can be no longer retained. Moreover, there are several t Professor Grant maintains that there is a pancreas, or its repre- Testacea which are not Mollusca. sentative, in all classes of Mollusca.—Ep, CEPHALOPODES. aay, and incapable of active exertion, they maintain themselves amid living beings princi- pally by their fecundity, and the tenacity with which they retain life. DIVISION OF THE MOLLUSCA INTO SIX CLASSES.* The general form of the body of the Mollusca being, in a sufficient degree, propor- tional to the complication of their internal organization, indicates their natural divisions. In some, the body has the form of a sac, inclosing the branchiz, and open above, whence there protrudes a head well developed, and crowned with certain strong fleshy elongated productions, by means of which the animals progress, and seize upon objects. We call these the CEPHALOPODES. In others, the body is not open; the head has no appendages, or only very minute ones; the principal organs of locomotion are two wings, or membranous fins, placed on the sides of the neck, and in which the branchial tissue is often spread. These are the PreropovEs. Others, again, crawl on the belly on a fleshy disk, sometimes, though rarely, com- pressed into a fin. They have almost all a distinct head. We call these the GASTEROPODES. A fourth class is composed of those Mollusca in which the mouth lies concealed in the base of the cloak, which also incloses the branchiz and the viscera, and opens either throughout its whole length, or at both its extremities, or at one only. These are our ACEPHALES. A fifth comprehends the species which, inclosed also in a cloak, and without an apparent head, have fleshy or membranous arms, garnished with cilize of the same nature. We have called these the Bracniopopss. Lastly, there are some which, alike the other Mollusca in the cloak, the branchiz, &c., differ from them in having numerous horny articulated members, and in a nervous system more allied to that of the Annulose Animals. Of these we constitute our last class, the CrrrRHOPODEs. THE FIRST CLASS OF MOLLUSCA. THE CEPHALOPODES.* The cloak unites under the body, and forms a muscular sac, that incloses all the viscera. In several species, its sides are extended into fleshy fins. The head issues from the opening of the sac: it is roundish, furnished with two large eyes, and crowned with fleshy conical arms or feet, varying in their length, and capable of being bent very vigorously in every direction; and, as their surface is armed with suckers, the animals fix themselves, by their means, with great force to whatever objects they em- brace. With their feet they seize their prey, walk, and swim. They swim with the head backwards, and crawl in all directions, with the head beneath and the body above. classes is entirely my own, as well as the greater number of the sub divisions to the second degree. + The Cephalophora of De Blainville. * For the name Mollusca, M. de Blainville proposes to substitute Malacozoa; and he separates from them the Chitons and the Cirrho- pods, with which he makes a subtypical section nnder the name Malentozoaria. The following distribution of the Mollusca into 338 MOLLUSCA. A fleshy funnel placed at the aperture of the sac, before the neck, affords an outlet to the excretions. The Cephalopodes have two branchiz, one on each side of the sac, in the shape of a compound fern-leaf. The great vena cava, when between them, divides into two branches, which terminate each in a fleshy ventricle, placed at the base of its respective branchia, and propelling the blood into it. The two branchial veins tend to and terminate in a third ventricle, situated near the bottom of the sac, whence the blood is carried to every part of the body by different arteries. Respiration is effected by the water which enters into the sac, and is driven out again through the funnel. It appears that the water even penetrates into two cavities of the peritoneum, which the venze cave cross in their course to the branchie; and that it has some influence on the venous blood, through the medium of a glandular apparatus attached to these veins. The mouth opens amidst the bases of the feet. It has two powerful corneous jaws, similar to the beak of a Parrot, and between the jaws is a tongue roughened with horny prickles. The gullet swells out into a crop, and then passes into a gizzard as fleshy as that of a bird, to which succeeds a third membranous and spiral stomach, into which the liver, which is very large, pours its bile through two conduits. The intestine is simple and short. The rectum opens into the funnel. These animals have a peculiar excretion of a deep black colour, which they use to taint the water when concealment is necessary. It is secreted bya gland, and reserved in a sac, differently situated in different species. Their brain, inclosed in a cartilaginous cavity of the head, sends off from each side a cord which swells, within each orbit, into a large ganglion, whence are derived innu- merable optic filaments. The eye is formed of numerous membranes, and 1 is “covered by the skin, which becomes transparent in passing over it, and sometimes forms folds that supply the want of eyelids. The ear is merely a little cavity excavated on each side near the brain, without semicircular canals or external passages, and in which there is suspended a membranous sac, containing a little stone. The skin of these animals, particularly of the Octopus, changes colour, in patches and in spots, with a rapidity greatly superior to that of the Chameleon.* The sexes are separate. The ovary of the female is at the bottom of the sac. ‘Two oviducts carry the eggs from it, passing them through two large glands which envelope them, during their passage, with a viscous fluid, and gather them together into a sort of cluster. The testicle of the male, similar in position to the ovary, gives off a vas deferens that terminates in a fleshy penis situated to the left of the anus. A vesicula seminalis, and a prostate, also open there. There is reason to believe that impreg- nation is effected by a sprinkling of the seminal fluid over the eggs, as illustrated in the majority of Fishes. In the season of spawning, the vesicula contains a vast number of little filiform bodies, which, through a peculiar mechanism, writhe and move about rapidly as soon as they fall into the water, and shed the fluid with which they are filled. These animals are voracious and savage; and as they are agile, and are furnished * See Carus, Nov Act. Nat. Cur. xii. part i. p. 320; and Sangiovanni, dann. des Sci. Nat. vol. xvi. p. 308. [Also Coldstream, in Edinburgh Journ. of Nat. and Geograph. Science, vol. ii, p. 296.) CEPHALOPODES. 339 with numerous organs for seizing their prey, they destroy many [ishes and Crusta- ceous animals. Their flesh is eatable. Their inky secretion is employed in painting, and from it some have asserted that the China ink of commerce is manufactured.* The Cephalopods comprise only one order +, which we divide into genera froin the nature of the shell. Those which have no external shell formed, according to Linnzus, the single genus Sepia, or Currie-risx,t which we now subdivide as follows :— THE Poutres (Octopus, Lam.) ; the Polypus of the ancients. These have only two small conical grains of a horny substance imbedded in their back, one on each side; and their sac, having no fins, represents an oval purse. Their feet are eight in number, all nearly of equal size, very large in proportion to the body, and united together at their insertions by a mem- brane. The Octopus uses them equally in swimming, in creeping, and in seizing its prey. From their length and strength they are formidable weapons, by means of which the prey is entangled and caught ; and they have often been the destruction of swimmers.§ The eyes are proportionally small, and the skin can be made at will to contract over them so as to cover them completely. The ink bag is embedded in the liver. The glands of the oviducts are small. Some (the Polypes of Aristotle) have their suckers in two alternating rows along [the oral margin] of each foot. The common species (Sepia octopodia, Linn.), with a minutely granulous skin, arms six times as long as the body, and garnished with 120 pairs of suckers, infests our coasts in summer, where it destroys an immense quantity of Crustacea. The seas of the tropics produce the Octopus granulatus, Lam. (Sepia rugosa, Bosc.) with fifty pairs of suckers. Some believe this to be the species which furnishes the China ink of commerce. Other Poulpes (the Eledons of Aristotle) have only a single row of suckers down each foot. In the Mediterranean there is a species remarkable for its musky smell: it is the Octopus moschatus, Lam.—Mém. de la Soc. d’ Hist. Nat. in 4to, pl.11; Rendelet, 516. Tue Arconaovts (Argonauta, Linn.)— Are Poulpes with two rows of suckers: the pair of feet nearest the back expand, at their extremities, into a broad membrane. They have not the dorsal cartilaginous spicula of the common Octopus; but we always find these Cuttles in a very thin, regularly-grooved spiral shell, which, from the disproportionate size of the last whorl, has some resemblance to a canoe, the spire repre- senting the poop. The animal uses it too as a boat, for when the sea is calm, groups of them have been seen navigating the surface in it, employing six of their tentacula for oars, and raising, it is said, the two with expanded ex- tremities to serve the purposes of sails. If the waves rise, or any danger threatens, the Argo- naut withdraws all its arms into the shell, con- tracts itself there, and descends to the bottom. Its body does not penetrate within the spire of the shell, and it appears does not adhere to it, Fig. 151.—Argonauta at least there is no muscular attachment, and this fact has led some authors to think that the Cuttle is a parasite of the same nature as the Hermit-crab ||; but as it is always found in the same shell, as we never find any other animal there, although it is very common, and naturally adapted for rising to the * However, M. Al. Remusat has found nothing in Chinese authors to confirm this opinion, [which, the translator may add, is now known to be erroneous). + The discoveries of Mr. Owen have proved the necessity of dividing the class into two orders :—l. Disrancurata, with two branchie, of which all the naked Cuttle-fish are examples ; and, 2. TeTRABRANCHI- ATA, with four branchie, as in Nawtilus, and as supposed to have been in the multilocular-shelled fossil Cephalopodes.—Ep. t In Blainville’s system they form the order Cryptodibranchiata. § This fact needs confirmation ; and we need scarcely add, that the stories of their sinking boats and ships are entirely fabulous.—Ep | Hence M. Rafinesque, and others following him, have made the animal a genus under the name Ocythoe. [Certainly the opinion of its being a parasite was, until recently, entertained by most naturalists ; but that advocated by Cuvier has been greatly strengthened, or rather proved, by the experiments of Mrs. Power. See the Mag. of Natural History, conducted by Mr. Charlesworth; and the dissections and arguments of Mr. Owen, in the Proceedings and Transactions of the Zoological Society of London. The animal does not sail as here de- scribed: the use of the expanded arms is to retain the animal within its shell.] » “ la 340 MOLLUSCA. surface, and as it has been even asserted that the germ of this shell has been seen in the egg of the Argonaut *, we must say that this opinion is, to say the most of it, still very problematical.—Poli, Testac. Neap. iii. p. 10. See also Ferussac, Mem. de la Soc. d’Hist. Nat. de Paris, ii. p. 160; and Ranzani, Mem. di Stor. Nat. Lec.i.p. 85. Itis the Nautilus and Pompitus of the ancients.—Plin. ix. c. 29. We know some species, very like each other bothin the animal and shell, which Linneus confounded together under the name of Argonauta argo, vulgarly called the Paper-nautilus. It is supposed that we must ascribe to an animal analogous to the Argonaut, the Bedlerophon,—fossil shells rolled up spirally and symmetrically, and without septa; but thick, not grooved, and whose last whorl is propor- tionably shorter. [Sowerby says that Bellerophon is the only fossil that bears any real resemblance to Argonauta, but neither shell, in his opinion, has been formed by a Cephalopodous animal, but probably by one nearly like that of Carinaria. The fossils are characteristic of the carboniferous limestone, and the oldest secondary strata : in these the shell is frequently found changed to silex.] THE SLEEVE-FISH (Loligo, Lam.)— Have in the back, instead of a shell, a horny lamina in the shape of a sword or lancet. Their sac has two fins; and besides the eight feet, furnished with small pedicled suckers inordinately arranged, their head supports two arms much longer than the feet, and only acetibuleferous near the ends, which are enlarged. These the animal employs as anchors to fix itself. Their ink-bag is buried in the liver; and the glands of their oviducts are very large. They lay their eggs attached together in straight garlands, and in two series ; [and the entire mass somewhat resembles a mop, being composed of numerous intestine-like filaments tied together in the centre}. The family is now subdivided from the number and armature of the feet, and the form of the fins. The Loli- gopsis, like the Octopus, has only eight feet, but our knowledge of the genus rests upon figures that are scarcely trustworthy.t In Loéigo properly so called, the arms have suckers as well as the feet, and the fins are situated towards the end of the sac. We have three species in our seas,—the L. vulgaris (Sepia loligo, Linn.); L. sagittata, and L. subulata, or Sepia media, Linn. The Onychotheuthis, Lichenst. (Onykia, Lesueur,) have the form of the Loligo, but the suckers of their arms end in hooked spines. The Sepiola have rounded fins, attached, not to the end, but to the sides of the sac. The common Sepiola (Sepia sepiola, Linn.) occurs in our seas. The body is short and obtuse, with small circular fins. It never exceeds three inches in length; and its horny lamina is slender and pointed like a needle. { The Sepiotheutes, Blainv. (Chondrosepia, Leukard,) have the sac margined throughout with the fins, asin the Sepia; but their shell is horny, as in the Loligo. Tue Curr.e-Frisu, strictly so called (Sepia, Lam.),— Possess the two long arms of Loligo, and a fleshy fin stretched along each side of their sac. Their shell is oval, thick, tumid, and composed of an infinity of very thin parallel calcareous laminz, joined together by thousands of little hollow columns, which are placed upright in the spaces between every two lamine. This structure renders it friable, whence it is employed by artists in polishing various works; and it is given to cage birds to sharpen their beaks upon. The Sepia have the ink-bag separate from the liver, and situated deeper in the abdomen. The glands of the oviducts are enormously large. They deposit their eggs attached to one another in branched clusters, not unlike a cluster of grapes, whence the vulgar have called them Sea-grapes. The species distributed in all our seas (Sepia officinalis, Linn.) reaches a foot or more in length. Its skin is smooth, whitish, and dotted with red. In the Indian Ocean there is one with a skin roughened with tubercles (S. tuberculata, Lam.). (Among fossils we find some little bodies armed with a spine, which are the ends of a bone of Sepia. They constitute the genus Beloptera of Deshayes. See Ann. des. Sc. Nat. ii. xx.1,2. Some other fossils, but petrified, appear to have great relation to the beaks of the Sepiz. These are the Ryncholithes of M. Faure Biguet. —See Gaillardot, Ann. Se. Nat. ii. 485, and pl. xxii.; and D’Orbigny, ib. pl. vi.) Linnus united in one genus—his Fig: 15%:—Epes of the Aneonaat® NavutTitus— All spirally twisted, symmetrical, and chambered shells,—that is to say, divided by partitions into several cavities ; and he supposed them to be inhabited by Cephalopods. One of them is, in fact, the shell of a Cephalopod, very similar to a Sepia, but with shorter arms: it is the genus Sprruta, Lam.— In the hinder part of the body of the Cuttle is an interior shell, which, however dissimilar to the bone of the Sepia in figure, does not differ much from it in the manner of its formation. If we imagine * This appears now to have been disproved.—Kp. Nut. Part. Zool. n. s. iii. p. 339, &&.—Ep. + Loligopsis is now ascertained to have two arms, remarkable for t On the anatomy of Sepiola and Loligopsis, consult Dr. Grant’s their great length and gracility.—See Ferussac, in dnn. des Sciences | paper in the Ist vol. of the Zoul. Trans.—Ep. NS EIN EE LO A a ey a ee CEPHALOPODES. 341 that the successive layers, instead of remaining parallel and in nigh approximation, were to become concave towards the body, more distant, each growing a little in breadth, and making an angle between them, we should then have a very elongated cone, rolled up spirally on one plane, and divided transversely into chambers. Such is the shell of Spirila ; which has these additional characters, that the turns of the spire do not touch, and that a single hollow column, occupying the interior side of each chamber, continues its tube with those of the other columns even to the extremity of the shell. This is what is named the Syphon. Only one species (Nautilus spivula, Linn.) is known. The shell of the Nautilus, properly so called, differs from that of the Spirula in this,—that the septa increase very rapidly, and that the last turns of the spire not only touch, but envelope the preceding. The syphon is in the centre of each partition. The common species (Nautilus pompilius, Lin.) is very large, silvered within, and covered externally with a whitish crust, varied with reddish somewhat undulated bands. According to Rumphius, its animal should be in part lodged in the last cell, and should have the sac, the eyes, the parrot-like beak and the funnel of other Cephalopods; but its mouth, instead of their great feet and arms, should be surrounded with several circles of numerous little tentacula, destitute of suckers. A ligament springing from the beak should run through the syphon, and fix the animal to it. It is probable also that the epidermis is prolonged over the exte- rior of the shell; but we may conjecture that it is thin upon such parts as are vividly coloured.* We meet with specimens of Nautilus (NV. pompilius, B. Gm. List. 552; Ammonia, Montf. 74), in which the last whorl does not envelope nor conceal the others, but in which all the whorls, although they touch, are visible,—a character which approximates them to the Ammonites; yet in every other respect they so closely resemble the common species that it is difficult to believe they are not a variety of it. Among fossils there are Nautili of large and moderate sizes, and of figures more varied than now exist in the ocean. We also find among fossils certain chambered shells, with simple septa and a syphon, in which the body is at first arched, or even spiral, but the last-formed parts of it are straight: these are the Lituus of Breyn, in which the whorls are either contiguous or separate, (the Hortoles, Montf.)—Others remaining straight throughout their growth are the Orthoceratites. It is not improbable that their animals had some resemblance to that of the Nautilus, or to that of the Spirula. Tue BELEMNITES Belong, probably, to the same family, but it is impossible to be sure of this, since they are only found in a fossil condition. Their whole structure, however, shows that they were internal shells.f They have a thin and double shell, that is to say, composed of two cones, united at their base, and the interior of which, much shorter than the other, is itself divided internally into chambers by parallel septa, concave on the side that looks to the base. A syphon extends from the summit of the exterior cone to that of theinternal cone, and is continued hence, sometimes along the margin of the septa, and sometimes through their centre. The space between the two testaceous cones is filled with a solid substance, composed either of ra- diating fibres or of conical layers, which envelope each other, and each of which rests on the margin of one of the septa of the inner cone. Sometimes we find only this solid part ; at other times we find also the nuclei of the cham- bers of theinner cone, or what has beencalledthealyeolz. Oftener these nuclei, and even the chambers, have left no other traces behind than some projecting circles within the inner cone; and in other instances, the alveole are found in greater or less numbers, and still piled or strung together, but detached from the double conical case which had inclosed them. The Belemnites are amongst the most abundant of fossils, particularly in beds of chalk and compact limestone. The most complete works upon them are the Memoire sur les Belemnites considerées zoologiquement et geologique- ment, by Blainville, Paris, 1827; and that of M.I. 8S. Miller on the same subject, in vol. ii. part 1, of the Geological Trans., Lond., 1826. [The English student will find the fullest details in Buckland’s Bridgewater Treatise.] M. de Blainville distributes them from characters derived from the greater or less depth to which the inner cone, or chambered part, pene- trates ; from the margins of the external cone, which has, or has not, a small Fig. 153.—Belemnites. « The structure of this singular Cephalopod has been fully described which fossils are occasionally referred to living types, to mention that and illustrated in a very admirable manner, by Mr. Owen, in his | Raspail believes the Belemnites to be the cutancous appendages of “ Memuir on the Pearly Nautilus,” Lond., 1832.—En. some sca animal, perhaps allied to the Sea-urchins, (Echinus).—Ep. + It may give the student an idea of the nature of the evidence on | iss) 342 MOLLUSCA. fissure ; from the exterior surface being marked with a longitudinal gutter on one side, or with two or several gutters towards the summit ; or as that surface is smooth and without gutters. Some fossils, very much like the Belemnites, but without a cavity, and even with a protruding basis, form the genus Actinocamax of Miller. It is upon similar conjectures that the classification of the Ammonites, Brug., or SNAKE-STONES,— Is founded, for they, also, are only found in a fossil state. They are distinguished, in general, from Nautilus, by their septa, which, instead of being plain or simply concave, are angulated, sometimes undulated, but oftener gashed on the margins, like the leaves of the Acanthus. The smallness of their last cell leads to the belief that, like the Spirula, they were internal shells. The beds of the secondary mountains swarm with them, and we find them there from the size of a bean to that of a chariot wheel. The variations of their whorls and of their syphon enable them to be subdivided. Thus the name Ammonites, Lam., is restricted to the species in which all the whorls are visible. Their syphon is near the margin. They have been still further distinguished into those which have the margins of the septa foliaceous, (the Ammonites, the Planites of Haan,) and into those in which they are simply angular and undulatory (the Ceratites of Haan). Those in which the last whorl envelopes all the others, are the Ordulites, Lam., or the Globites and Coniatites of Haan, or Peloguses, Montf. The syphon is the same as in Ammonites.* The name Scaphites, Sowerby, [or rather of Parkinson, | has been appropriated to those species whose whorls are contiguous and on the same plane, excepting the last, which is detached and bent upon itself. Those which are perfectly straight are the Baculites, Lam. Some are round, others are compressed ; and in the latter we some- times observe the syphon to be lateral. The Hamites of Sowerby, [Par- kinson,] are known by having their first formed cells arcuated. But the g Turrilites, Montf., differ more than any from the usual habit of the family, € for the whorls, in place of remaining on the same level, descend rapidly, and give to the shell that obelisk form which is denominated turriculated. Fis: 155.—Portion of a Baculite From analogy, it is supposed that we ought to refer to the Cephalopods, and to consider as being in- ternal shells Fig. 154.—Ammonites THe CaMERINES, Brug. (Nummulites, Lam.),— For all of them are equally fossil. They have a lenticular shape, without any apparent aperture, but within there is a spiral cavity, divided by septa into a multitude of little chambers without a syphon. Theyare amongst the most generally diffused fossils, and almost of themselves form some entire chains of calcareous hills, and immense banks of building stone. (It is upon such rocks that the pyramids of Egypt are founded, and with stones of the same description that they are built.) The commonest, and which attains the largest size, are altogether discoid, and have only a single row of chambers in the whorl of the spire. Some minute sorts of this description have been aiso found recent insome seas. Other minute species, both living and fossil, have their margin bristled with points, which give to them the figure of stars (Siderolithes, Lam.). The works and the patient researches undertaken successively by Bianchi (or Janus Plancus), Soldani, Fichtel and Moll, and Alex. d’Orbigny, have made known an astonishing number of these chambered and esyphonal shells (Nummularie), of extreme littleness, so as often to be altogether microscopical, either in the sea, among sand, sea-weed, &c. ; or, in a fossil state, in the sand-beds of various countries ; and these shells vary to a remarkable extent in their contour, the number and the relative position of their chambers, &c. One or two species, the only ones in which the animals have been noticed, have, apparently, a small oblong body surmounted by numerous red tentacula, a structure which, taken in * According to Sowerby, Orbulites and Ammonoceras, of Lamarck, are not distinct from Ammonites. The Ammonoceras is only an acci- dentally worn portion of an Ammonite.—Ep. PTEROPODES. 343 connection with the septa of their shells, has occasioned them, like the genera which we have just treated of, to be arranged in the series of Cephalopods ; but this classification requires to be confirmed by more numerous observations before it can be considered as settled.* Linnzeus and Gmelin placed the species known in their time in the genus Nautilus. M. d’Orbigny, who has studied them more carefully than any one else, makes an order of them, which he calls Foraminiferes, because the cells communicate only by holes; and he divides them into families from the manner in which the cells are arranged. When the cells are simple, and disposed spirally, the shells constitute his Helicosteqgues, which are subdivided ; for, if the whorls of the spire envelope each other, as is particularly the case with the Camerines, he names them Helicostegues nautiloides ; if the whorls do not cover themselves, they are H. ammonoides; and if the whorls rise up, as in the greater number of univalves, they are his H. turbinoides. The family Stycostegues is known by the simple cells being, as it were, threaded on a single straight, or slightly curved axis. When the cells are disposed in two alternate rows, they are then the Enallostegues. If the cells are gathered together in small numbers, and heaped up ina globular shape, the family is the Agathistegues. Lastly, in the Entomosteqgues, the cells are not simple, as in the preceding families, but are subdivided by transverse partitions, so that a section of the shell discovers a sort of trellis-work. THE SECOND CLASS OF MOLLUSCA.+ THE PTEROPODES. They swim, like the Cephalopods, in the sea, but cannot fix themselves there, nor creep, from want of feet. Their organs of locomotion consist of fins only, placed at each side of the mouth. The species known are of small size, and few in number. They are all herma- phrodites. Tue Crt0 (Clio, Linn.; Clione, Pall.)— Have an oblong membrauous body, without a cloak; the head is formed of two rounded lobes, whence the little tentacula project; two small fleshy lips, and a tongue, upon the front of the mouth; and the fins contain the vascular net- work which supplies the place of branchiz ; the anus, and the orifice of generation, are under the right branchie. Some have as- serted the existence of eyes. The viscera do not nearly fill the exterior envelope. The stomach is large, the intestine short, and the Fig. 156.—Clio borealis liver voluminous. The most celebrated species (Clio borealis, Linn.) swarms in the northern seas; and, from its abundance, be- comes a food for the Whales, although no individual exceeds an inch in length. Bruguiére has observed a larger species, in equal abundance, in the indian Ocean. It is distinguished by its rose-colour, its emarginate tail, and its body separated into six lobes by as many grooves. It seems that we must also place here the CymsButia of Peron,— Which has a cartilaginous or gelatinous envelope in the shape of a boat, or rather of a shoe, roughened with little points arranged in longitudinal rows. The animal has two large vascular wings, which are its branchiz and its fins; and between them, on the open side, there is a third lesser lobe with three points. The mouth, with two small tentacula, is between the wings, towards the closed side of the shell; and above are two minute eyes, and the orifice of generation, whence issues a penis in the form + M. de Blainville unites my Pteropodes and Gasteropodes into one class, which he calls Paracephalophora, of which my Pteropods constitute his order 4porobranchiata. ‘This order he divides into * Some of these multilocular shells belong apparently to the testa- ceous Annelides ; while the curious observations of Dujardin seem to have proved that the great bulk of the Foraminiferes are not Mol- lusca, but animals related to the Infusoria.—dnn. des Sci. Nat. n. s. two families :—The Thecosomata, which have a shell; and the Gymno- vol. v. et seq.—En. somata, which are shell-less. 344 MOLLUSCA. of a little beak. The transparency of the body allows us to distinguish the heart, the brain, and the viscera, through the envelopes. Tue PNEUMODERMES (Pneumodermon, Cuv.)— Carry their dissimilarity to the Clios a little further. The body is oval, without cloak or shell; the branchie attached to the skin, and formed of little leaflets set in two or three lines, disposed in the figure of the letter H opposite to the head; the fins small; the mouth (garnished with two small lips, and two bundles of numerous tentacula, terminated each by a sucker) has underneath a small lobe, or fleshy tentaculum. The only species (P. Peronii, Cuv.) was taken in the ocean by Peron. It is not less than an inch in length. THe Limacinaé, Cuv.,— Ought, from the description of Fabricius, to have a nigh relationship to Pneumodermon; but their body is terminated with a spiral tail, and is lodged in a very thin shell, of one whorl and a half, umbilicated on one side,* and flat on the other. The shell serves the purpose of a boat; and when the creature wishes to swim on the surface, it uses its fins as oars. The species known (Clio helicina of Phipps and of Gmel.; Argonauta arctica, Fabr., Faun. Greent. 387) is not less abundant than the Clio borealis, in the Arctic seas ; and is likewise a principal aliment of the Whale. Tue Hyates (Hyalea, Lam.; Cavolina, Abildg.)— Have two very large wings; no tentacula; a cloak slit on the sides, containing the branchie at the bottom of the fissures, and clothed with a shell slit in a corresponding manner, the ventral aspect of which is very tumid; the dorsal aspect is flat, longer than the other, and the transverse line which unites them behind is furnished with three acute denticulations. When alive, the animal protrudes, through the chinks of the shell, certain narrow filaments, or productions of the cloak, of variable lengths. The best known species (Anomia tridentata, Forskahl; Carolina natans, Abildgaard; Hyalea cornea, Lam.) has a small yellowish semi-transparent shell, and is found in the Mediterranean and the Indian Ocean. Tue CiEopores (Cleodora, Peron). For these, Brown first instituted the genus Clio. They appear to be analogous to the Hyales in the simplicity of their wings, and the absence of tentacula between them. It is also probable that their gills are concealed in the cloak ; but their conical or pyramidal shell is not slit along the margins. M. Rang distributes the genus into subgenera thus :—Cleodora, with the shell pyramidal; Creseis, with the shell conical, elongated ; Cuvieria, with the shell cylindrical; Psyche, the shell globular; Huribia, the shell hemi- spherical. (And it is probable that we should arrange near the Creseis, and even perhaps in the same subgenus, the Tripter of Quoy and Gaimard, which Blainville has referred to the family Acere.) It has been believed that we may place near to the Hyales,— Tue Pyrco,— A very small fossil shell discovered by M. Defrance. It is globular, very thin, and divided by a very narrow transverse fissure, excepting in front, where it becomes also a little enlarged. (Several Pteropodes have been discovered in the fossil state. M. Rang has found, in the ¢errains of Bordeaux, Hyales, Cleodore, and Cuvierize.—See dun. des Sci. Nat. for August 1826. The Vaginula of Daudin is a Creseis, according to Rang; and it has, in fact, all the characters of the same.) THE THIRD CLASS OF MOLLUSCA. THE GASTEROPODES. The Gasteropods constitute a very numerous class, of which the Slug and the Snail give a good general idea. They creep generally upon a fleshy disk, situated under the belly, but which sometimes assumes the form of a furrow, or of a vertical lamina. The back is covered with a cloak of greater or less extent, and of various figure, which secretes a shell in the greater number of the genera. ‘Their head, placed in front, is more or * Sowerby says, ‘‘ Umbilicated on both sides.”—Ep. GASTEROPODES. 345 less distinct, according as it is more or less drawn in under the cloak. It is furnished with tentacula of [comparatively] small size, and which do not encircle the mouth; their number varies from two to six, but they are sometimes wanting; they are organs of touch, and, at most, of smell also. The eyes are very small, sometimes placed upon the head, sometimes at its base, either to a side or at the tips of the tentacula; they are sometimes also wanting. The position, the nature, and the structure of their breathing organs vary, and afford characters whereby to divide them into several families ; but they have never more than one aortic heart,—that is to say, one placed between the pulmonary vein and the aorta. The position of the orifices of the organs of generation, and that of the anus, varies; but they are almost always on the right side of the body. Several are entirely naked, others have only an interior shell, but the majority are covered with one which contains the soft body, and shelters it. These shells are secreted in [or on] the cloak. Some of them consist of several symmetrical pieces [or valves]; some of a single symmetrical piece ; and others of a non-symmetrical piece, and when this is very concave, or continues to grow for a long time, an obliquely spiral shell is necessarily produced. In fact, that the shell may represent an oblique cone, on which are placed successively other cones always wider in one direction than in the others, it is necessary that the whole should turn to the side which enlarges the least. That part upon which the cone is turned is named the columella [or pillar], and it is sometimes full, and sometimes hollow. In the latter case, its opening is called the umbilicus. The whorls of the shell may remain nearly on the same plane, or they may tend always towards the base of the columella. In this case, the preceding whorls rise above the others as they are formed, and constitute what is called the spire, which is acute in proportion to the rapidity with which the whorls descend, and to the measure of their increase. ‘The shells with an elongated spire are said to be turbinate. When, on the contrary, the whorls remain depressed on the same level, and do not envelope each other, the spire is flat, or even concave. ‘These shells are called discoid. When the upper part of each whorl envelopes or covers the preceding, the spire is concealed. The place in the shell whence the animal protrudes itself, is named the mouth, or aperture. When the whorls remain nearly on the same plane, the animal, in creeping, has its shell placed vertically, the columella transversely upon the hinder part of the back ; and its head passes out under the margin of the mouth opposite to the columella. When the spire is turbinate, the whorls turn obliquely to the right side in nearly all the species, but in a small number to the left; and the latter are named reversed, [or sinistrorsal]. It is to be observed that the heart is always on the side opposite to that to which the spire is directed. It is, consequently, in general on the left, and only on the right in the reversed kinds. The contrary is the rule with the organs of generation. The organs of respiration, which are always within the last whorl of the shell, receive the circumfluent element under its margin, sometimes because the cloak is detached from the body along the whole of this margin, and sometimes because it is perforated there with a hole. The margin of the cloak, in many Gasteropods, is prolonged into 346 MOLLUSCA. a canal, through which they can reach and receive the circumfluent medium without extruding their head or foot from the shell. The shell has then, also, in its margin, near the end of the columella, opposed to that towards which the spire tends, an emar- gination, or furrow, wherein to lodge the canal of the cloak. Consequently, the canal is to the left in common, but to the right in the reversed species. Further, the animal being very flexile, can vary the direction of the sbell, and oftenest when there is an emargination or furrow, it directs the canal forwards, whence it happens that the spire points to behind, the columella to the left, and the opposite margin to the right. The contrary of this occurs in the reversed sorts : and this is the reason that we say that their shell turns to the left, [or is sinistral]. The mouth of the shell, and consequently also the last whorl, is greater or less, in relation to the other whorls, according as the head or the foot of the animal is more or less voluminous in relation to the mass of viscera which remains fixed within the shell; and the mouth is wider or narrower just as the same parts are more or less broad. There are shells whose mouth is narrow and long; and there it is that the foot is thin, and doubles on itself before it can be retracted. The greater number of the aquatic Gasteropods with a spiral shell, have an operculum, or a corneous or calcareous plate, affixed upon the posterior part of the foot, to close the aperture when the snail has withdrawn within the shell. There are Gasteropods with separate sexes, and others which are hermaphrodites ; and of these some are capable of self-impregnation, while, in others, the copulation of two individuals is required. Their organs of digestion do not vary less than those of respiration. The class is so numerous that we have deemed it expedient to divide it into a certain number of orders, the characters of which we have drawn from the position and the form of the branchiz. THe PULMONEA Breathe the atmosphere, receiving the air within a cavity whose narrow orifice they can open and close at will: they are hermaphroditical, with reciprocal copulation : some have no shell, others carry one, which is often truly turbinate, but never furnished with an operculum. THe NuDIBRANCHIATA Have no shell, and carry their variously-figured branchiz naked upon some part of the back. THE INFEROBRANCHIATA Are similar, im some respects, to the preceding, but their branchiz are situated under the margins of the cloak. THe TECTIBRANCHIATA Have their branchie upon the back, or upon the side, covered bya lamina, or fold of the cloak, which almost always contains a shell more or less developed ; or sometimes the branchiz are enveloped in a narrow fold of the foot. These four orders are hermaphroditical, with reciprocal copulation. THe HETEROPODES Carry their branchie upon the back, where they form a transverse row of little tufts, and are, in some instances, protected, as well as a portion of the viscera, by a symmetrical shell. What best distinguishes them is the foot compressed into a thin vertical fin, on the margin of which a little sucker often appears,—the only trace left of the horizontal foot of the other orders of the class. a ee Ee eee GASTEROPODA PULMONEA. 347 THE PECTINIBRANCHIATA Have the sexes separated : their respiratory organs consist almost always ot pranchize composed of lamella united in a pectinated form, and which are concealed in a dorsal eavity opening with a wide gape above the head. Nearly all of them have turbinated shells, with the mouth sometimes entire, sometimes emarginate, sometimes produced into a syphonal canal, and gene- rally capable of being more or less exactly closed by an operculum attached to the foot of the animal behind. THE SCUTIBRANCHIATA Have branchiz similar to those of the Pectinibranchiata, but they are complete hermaphrodites, and require no union with a second to effect impregnation : their shells are very open, and in several like a shield; they never have any operculum. THE CyCLOBRANCHIATA Are hermaphrodites of the same kind as the Secutibranchiata, and have a shell consisting of one or several pieces, but in no case turbinate nor operculate: their branchiz lie under the margin of their cloak, as in the Inferobranchiata. ’ THE FIRST ORDER OF GASTEROPODES. THE PULMONEA.* From other Mollusca, those of this order are distinguished in this,—that they breathe the atmosphere through a hole which opens under the margin of their cloak, and which they can dilate or contract at pleasure. They have, also, no branchiz, but only a network of pulmonary vessels, which creep upon the walls, and more particularly upon the ceiling of their respiratory cavity. Some of them are terrestrious, and others live in the water, but these are necessitated to come, from time to time, to the surface, to receive within their pulmonary cavity the air fit for respiration. All of them are hermaphrodites. The TERRESTRIAL PULMONEA have almost all four tentacula, for, in a few only, of small size, we cannot see the inferior pair, probably because of their littleness. Those of them which have no apparent shell, form the genus Limax— Of Linneus, which is divided as follows:—The Limaces, properly so called (Limax, Lam.), have an elongated body, and a closely-fitted fleshy disk, or shield, for a cloak, which occupies merely the anterior part of the back, and covers only the pulmonary sac. It contains, in several species, a small, oblong, flat shell, or at least, in lieu of it, a calcareous [molecular] deposition. The respiratory orifice is at the right side of the shield, and the anus opens near it. The four tentacula are protruded and withdrawn by a process of evolution and involution ; and the head itself can be contracted partially under the disk of the cloak. The orifice of the generative organs is under the right superior tentaculum. Inthe mouth is an upper jaw only, of a crescent form, and toothed, which enables them to devour with voracity herbs and fruits, to which they are very destructive. Their stomach is elongated, simple, and membranous. M. de Ferussac distinguishes the Arions by the respiratory orifice being towards the anterior part of theshield, in which there are only calcareous grarules. Limax rufus, Linn., is an example which we meet with every step in moist seasons, and which is some- times almost wholly black. It is thespecies of which a broth is used in diseases of thechest. The Limax proper, has the orifice near the hinder part of the Fig. 157 —Limax rufus, shield, and it contains a more distinctly formed shell Such are the Limax maximus and L. agrestris of Linn. * Pulmobranchiata of Blainville. [In consequence of some ob- | animals, urzed by Lamarck, English authors often call this order the jections to the term pulmunated being applied to any invertebrated Preumonsbranchous.—Ep.] 348 MOLLUSCA. THE VAGINULUS, Feruss.*¥— Has a close-fitted cloak without a shell, extended over the whole length of the body; four tentacula, of which the inferior are somewhat forked; the anus quite at the posterior extremity, between the end of the cloak and that of the foot; and the same orifice leads to the pulmonary cavity situated along the right flank. The orifice of the male organ of generation is under the right inferior tentaculum, and that of the female organ under the middle of the right side. These organs, as well as those of digestion, are very similar to those of the Snail. The genus belongs to both Indies, and is much like our Slugs. THE TrESTACELLa, Lam.— Have the respiratory aperture, and the anus, near the posterior extremity; their cloak is very small, and also placed there, and contains a small ear-shaped shell,.which does not equal one-tenth of the length of the body. In other respects, these animals resemble our Slugs. One species is found abundantly in our southern departments (Testacella haliotoidea, Diaparn.), living under ground, and feeding principally on earth-worms. M. de Ferussac has observed that its cloak assumes an extraordinary develope- ment when the animal finds itself in too dry a situation, and thus produces for itself a sort of shade and shelter. [There are some interesting illustrations of the Pea tert ese etiye habits of the Testacelle in Loudon’s Magazine ; : of Natural History, vol. vii.] Tue ParMACcELLA, Cuv.— Has a membranous cloak, with loose margins, situated [upon a gibbosity] in the middle of the back, and containing, in its posterior part, an oblong flat shell, which exhibits the mere vestige of a spine. The respiratory aperture, and the anus, are under the right side of the middle of the cloak. The first known species was from Mesopotamia (Par. Olivieri, Cuv.); but we have now one from Brazil, and some others from India. In the terrestrial Pulmonea with a perfect and exterior shell, the margin of its aperture is in general thickened and reverted in the adult. Linnzus referred to his genus HELIx,—— Every species in which the aperture of the shell (somewhat encroached upon by the projection of the penultimate whorl) assumes a crescent-like figure. When this lunated aperture is wider than it is deep, the shells belong to Helix, Brug. & Lam. In some, the shell is globular. Everybody knows the edible Snail (Hel. pomatia, Linn.), common in gardens and vineyards, and esteemed as a delicacy in some departments; and the common Snail (Hel. nemoradis, Linn.), remarkable for the vividness and variety of its colours, and very hurtful to garden stuffs in wet seasons. There is no one who has not heard of the curious experi- ments, showing to what extent they can reproduce ; amputated parts. Other species have a depressed shell, or one with a flattened spire; and we ought not to pass over without notice such as have interiorly projecting ribs, nor those in which the last whorl is abruptly turned up in the adult [so that the aperture appears ips) Avaatoma ecouore in the same plane as the spire], and then assumes an irregular plicated form,—hence denominated Anastomat by Lamarck. The Vitrina, Drap. (Helico-Limaz, Feruss.), are Helices with an extremely thin subspiral shell, without an um- bilicus, and with an ample aperture, whose margin is sharp and even. The body of the Snail is too large to be drawn within the shell. The cloak has a double edge; and the superior fold, which is divided into several lobes, may be made to overlap the shell so as to clean and polish it. The European species live in moist situations, and are very small; but there are some of large size in warm climates. * Synonymous with the Onchidiwm of Buchanan; and the Veroni- | the reflected outer lip, and the teeth in the aperture. Until then, the cella of Blainville is not different,—En. animal must crawl about like other Snails, with the spire of its shell + “The peculiarity which distinguishes this genus from all the other Heliciform Univalves is so extraordinary, that it Appears to us to be deserving of particular notice, inasmuch as it evidences a consider- abie alteration in the habit and economy of the animal which produces | are known.—Ep it, at the time of its arrival at its last period of growth, when it forms uppermost; bnt as soon as it arrives at maturity, and is about to form its complete aperture, it takes a reverse position, and afterwards constantly carries its spire downwards.’”-—Sowgrsy. Two species Mum MCT ek ea ea Ur ess et anc a EE GASTEROPODA PULMONEA. 349 We ought to arrange near them some Helices which, without having a double-edged cloak, are equally incapable of retreating within their shell. Helix rufa and brevipes, Ferus., are examples. When the depth of the aperture is greater than its width, as is always the case in shells with an oblong or elon- gated spire, they are the terrestrial Bulimi of Brug., which it appears necessary to subdivide as follows :—The Bulimus, Lam., have an oval rim, thickened in the adult, but without denticulations. In tropical countries, there are some large and beautiful species; some remarkable for the size of their eggs [equal to that of a Pigeon], and with an equally solid shell; and others for their reversed shells. In our own country there are several of small or moderate size, and one of them (Helix decollata, Gm.) has the singular habit of breaking off in succession the whorls from its spire. This example has been quoted as a proof that the muscles of the animal can be voluntarily detached from the shell; for a time does come when this Bulimus preserves no more than a single whorl of all those it possessed at the beginning of the decollation. The Pupa, Lam., have an obtusely-pointed shell, whose last whorl is narrower than the penultimate, whence it has an elliptical, or sometimes a cylindrical form. The mouth is surrounded by a thickened rim, and en- croached upon, on the side of the spire, by the penultimate whorl. The species are very small, living in moist stations, amongst mosses, &c. There is sometimes no toothlet in the aperture, but oftener there is one or more either on the projecting part of the penultimate whorl, or within the outer margin. [The genera Vertigo, Mill., and Alea, Jeffreys, appear to have been separated from Pupa on too slight grounds; for the inferior tentacula are not absent, as is alleged, but only reduced to a minimum. The Partula, Fer., deserves probably to be kept dis- tinct ; for the species are ovo-viviparous, while all the others are oviparous. ] The Chondrus, Cuv., has, as in these latter Pup, the mouth of the shell encroached upon by the penultimate whorl, and guarded with plates or toothlets; but the figure of the shell is more ovate, and more like that of the common Bulimi. Some have the teeth on the rim of the aperture, and others have plaits situated deeper within it. [This genus appears to be synonymous with the Azeca of Leach. ] Here terminates the section of terrestrial Helices whose shell has a thickened oral rim [or peritreme] in the adult. The Succinea, Drap., has an ovate shell, with an aperture longer than its width, as in Bulimus, but larger in proportion ; the outer lip sharp, and the side of the columella almost concave. The Snail is too large to be con- tained in it, and we may almost regard it as a Testacella with a big shell. The inferior tentacula are very small. It lives upon the herbs and the shrubs of the brinks of rivulets, whence it has been considered as an amphibious genus. We ought to separate from the genus Z7'urdo of Linneus, and approximate near the terrestrial Helices, the CrausiniA, Drap.,— Known by the slender, long, and pointed shell, with the last whorl narrower than the penultimate in the adult, compressed, and a little detached. Its mouth is entire and margined, and often toothed or furnished with plates. There is mostly found, within the last whorl, a little lamina [commonly termed the clausium], slightly curved, a little like the letter S, the use of which to the animal is unknown to us.* The species are small, and live in moss, at the foot of trees, &c. A great number of them are reversed. THe AcHATINA, Lam.— Ought likewise to be separated from the Bulle of Linnezus, and brought hither. The oval or ob- long shell has the aperture of Bulimus, but is not margined; and has the extremity of the colu- mella truncated, which is the first index of the emarginations we find in so many of the shelis of the marine Gasteropodes. These Achatinz are large Snails which feed on trees and shrubs in hot climates.t- Of such as have, within the last whorl, a callus or particular thickening, Montfort makes his genus Liguus. The body- whorl is proportionably narrow; and when the San eens Se are ER end of the columella is curved towards the in- side of the aperture, and the body-whorl is broader, the species constitute Montfort’s Polyphemes. * The use is to close the aperture of the shell when the Snail has | shells: some are West Indian, and a very few European. Among the retired. See a good description of its mechanism by Mr. J. E. Gray, latter, we can only lay claim to one as decidedly a native of this in Zool. Journ, vol. i. p. 212.—Ep country, the 4. acicula of Lamarck.”"— En, t “* The greater number of Achatine,’’ says Sowerby, “ are African g , ) Y» 350 MOLLUSCA. THE Aquatic PuLMoNEA have only two tentacula. They come ever and anon to the surface to breathe, so that they can only inhabit waters of inconsiderable depth: thus they live in fresh waters or in brackish pools, or at least near the sides and mouths of rivers. There are some amongst them without a shell: such is the OncuHipIuMm, Cuy.* A large fleshy cloak, of the shape of a buckler, overlaps the foot on every side, and even covers the head when this is contracted. It has two long retractile tentacula, and over the mouth a veil, sinu- ated, or formed of two triangular compressed lobes. The anus and air-passage are under the hinder margin of the cloak, where, a little deeper, we find also the pulmonary sac. Near them, to the right, is the opening of the female organs, while, on the contrary, that of the male organ is under the right tentaculum ; and these two orifices are united by a groove which runs under and along the right edge of the cloak. Destitute of jaws, they have a muscular gizzard, succeeded by two membranous stomachs. Several species inhabit the coasts of the sea, but always in such a situation that they are uncovered at ebb tide, when they obtain the air necessary to respiration. The Aquatic Pulmonea, with perfect shells, have been placed by Linnzeus in his genera Helix, Bulla, and Voluta, whence they ought to be withdrawn. In Helix were the two following genera, whose aper- ture, as in Helix, had its inner [or pillar] margin protuberant and arcuate :— Tue PLanorsis, Brug.,— Had already been distinguished from Helix by Bruguiéres, and even previously by Guettard, because the whorls of their shell, rolled up nearly on a level, enlarge insensibly, and the mouth is wider than deep.t It contains a Snail with long, slender, filiform tentacula, at the inner base of which the eyes are situated. It can exude, from the margin of its cloak, a copious red liquor, which is not to be mis- taken for its blood. The stomach is muscular, and the food vegetable, as in the Limnez, which are the faithful companions of the Planorbes in all our stagnant waters. Tue Limn-xus, Lam., Were separated from the Bulimus of Bruguicres, because, notwithstanding the similarity of the shells, the margin of the Limnees is sharp-edged and not reflected, and their columella has an oblique fold. The shell is thin: the animal has two compressed, broad, triangular tentacula, with the eyes sessile at their inner base. They feed upon plants and seeds ; and their stomach is a very muscular gizzard, fur- nished with a crop. Hermaphrodites, after the fa- shion of their order, they have the female organ rather widely apart from the other,—a structure which compels them to copulate in such a manner that the individual acting as a male to his mate is the fe- male to a third, and from this peculiarity we occa- Fig. 162 —Limuwa stagnalis. sionally find them joined together in long strings. They abound in stagnant waters; and they are found plentifully, as well as the Planorbes, in marly or calcareous beds, which we thus discover to have been deposited from fresh water. Tue Puysa,— Which were arranged arbitrarily among the Bulle, have the shell of Limnzus, but still thinner, and there is no fold on the columella. The animal, when it swims or creeps, covers its shell with the two pectinated lobes of the cloak: it has two long setaceous tentacula, which are bulged at the base where the eyes are placed. The species are small, and live in clear ponds. One of them (Bulla fontinalis, Lam.), has its whorls sinistral, {and this, indeed, is the only certain character which distinguishes the genus from Limnzus. }} * M. de Blainville has changed the name Onchidium into Peronia, + Sowerby maintains that the shell in Planorbis is always reversed, and transfers the first to the Vaginulus. He places Peronia | or sinistral.—Ep. amongst his Cyclobranchia; but I cannot perceive any real difference t When the shell is oval-globose, and the cloak sufficiently ample between their respiratory organ and that of the other Pulmonea. [As | to cover it, in an expanded state, the genus is the Amphipeplea of this genus is not the Onchidium of Buchanan, as Cuvier suppdsed, | Nilson; [and when the shell is turreted, and the cloak entire, the M. de Ferussac proposes to name it Onchis.] genus is named Aplewa by Fleming.—Ep.] GASTEROPODA NUDIBRANCHIATA. 351 From the observations of Van Hasselt it seems that we must here arrange THE ScaraBes, Monttf. The shell is oval, and the aperture contracted by large teeth projecting from both the columellar side as well as the outer lip: this lip is swollen, and as the animal re-makes it after every half-whorl, the shell is most protuberant on two opposite lines, and has a flattened aspect. The animals live on aquatic plants in the Indian Archipelago. The two genera which follow were misarranged among the Volutes. Avuricuta, Lam.,— Differing from all preceding aquatic Pulmonea by having their columella striated with large oblique channels. Their shell is oval or oblong; the aperture of the shape of the Bulimus or Limneus ; the lip furnished with a varix. Several species are of considerable bulk; but it is not ascertained if they live in marshes, like the Limnzeus, or merely upon their margins, after the manner of the Succinea. [One species, according to Lesson, lives in fresh water ; the others appear to be terrestrial, living on rocks by the sea-side.] We find only one in France, from the coast of the Mediterranean (Awricula myosotis, Drap.) The male has two tentacula, and the eyes are at their bases. [Carychium, Muller, answers so nearly to the description of Auricula, that the genera ought probably to be conjoined. The typical species (C. minimum) lives under leaves in shaded woods. ] Fig. 163.—Auricula scarabeus Tae Mextampes, Montf. (Conovulus, Lam.), Like the Auricula, have prominent plaits on the columella, but their aperture has no varix, and its inner lip is finely striated: the shell has somewhat the shape of a cone, of which the spire makes the base. They inhabit the rivers of the Antilles. THE SECOND ORDER OF THE GASTEROPODES. THE NUDIBRANCHIATA.* They have neither a shell nor pulmonary cavity, but their branchie are exposed naked upon some part of the back: they are all hermaphroditical and marine : they often swim in a reversed position, the foot applied against the surface, and made concave like a boat; and they assist their progress by using the edges of the cloak and the tentacula as oars. Tue Doris, Cuv.,— Have the anus in the posterior part of the back, and the branchie are arranged in a circle round the anus ; and as each resembles a little arbuscule, they constitute alto- gether a sort of flower. The mouth is a small proboscis, situated under the anterior edge of the cloak, and is furnished with two small conical tentacula. There are other two tentacula, of a conoid figure, sep [and lamellated structure,] which issue from the superior and ante- Fig. 164.—Doris cornuta rior part of the cloak. The organs of generation have their orifices near to each other, under its right margin. The stomach is membranous. A gland, intimately inter- laced with the liver, sheds a peculiar secretion, that escapes outwards by a hole near the anus. The species are numerous, and some of them of considerable size. We find them on the shores of every sea.t Their spawn is shed in the form of a gelatinous ribbon, on rocks and sea-weeds, &c. The Onchidores, Blainv., only differ from the Doris in the wider separation of their sexual organs, whose orifices communicate by a furrow drawn along the right side, as in the Onchidia. The Plocamoceres, Leuckard, have all the characters of Onchidores, and moreover the anterior edge of their cloak is adorned with numerous branched tentacula. The branchie of Polycera, Cuv., are like those of Doris, but simpler, and furnished with two mem- * My first four orders are joined together by M. de Blainville into | as they have two or four tentacula. what he calls a sub-class, and names Paracephaluphora monoica. Of + The Scottish species are described by Dr. Johnston in the Ist my Nuadibranchiata he makes two orders: in the first (Cyclobranchi- | vol. of the Annals of Natural History; and Montagu has deseribed ata) he places the Dorides; in the second (Polybranchiata) the | many British species in the Linnaan Transactions.—Ep. Tritonie and its allies, which he divides into two families, according 352 MOLLUSCA. branous laminz to cover them in time of danger: and besides the two conoid tentacula in front, similar to those of Doris, they have four, or sometimes six others, which are simply pointed. Tue Tritoniss (Tritonia, Cuv.),— Have a body, superior tentacula, and generative organs, as in the Doris; but the anus and the vent of the peculiar secretion are on the right side, behind the yulva: the arbuscular branchiz are arranged along each side of the back, and the mouth, guarded by broad membranous lips, is armed within with two lateral horny and cutting jaws, in shape somewhat like to the scissors for shearing sheep. We have a large species (Tritonia Hombergii, Cuv.) on our coasts ; and there are many others, some of them very small, which exhibit great variety in the size and figure of their branchiz. [Melibea, Rang, differs in having filiform simple tentacula issuing from a wide sheath, and two series of ovate muricated or tuberculated branchi# on the back, which readily fall off when the animal is handled. . rosea, which lives on floating sea-weeds near the Cape of Good Hope, is the type ; but there are some European Mollusca, of small size, which are also referable to it.] Tue THetuHys, Linn. ,— Have along the back two rows of tufted branchiz ; and upon the head a very large i Se membranous fringed veil, which curves, in its aN) 2 contraction, under the mouth. The mouth is a membranous proboscis without jaws: there is at the base of the veil two compressed tentacula, from the margin of which issues a small conical point. The orifices of generation, of the intestine, and of the peculiar secretion, are as in Tritonia. The stomach is mem- branous, and the intestine very short. There is, in the Mediterranean, a beautiful spe- cies of a greyish colour, spotted with white (Thetis jfimbria, Linn.). Fig. 163.—Tritonia, i mnt Hi 1 Tue Scyii#a, Linn. Fig. 166.—Thethys leporina, upper and under sides. In this genus the body is compressed ; the foot narrow and furrowed, to enable it to embrace the stems of sea- weed; no veil; the mouth forming a small proboscis ; the exterior orifices as in Thethys ; the tentacula compressed, terminating in a cavity from which a little point, with an unequal surface, can be protruded ; and upon the back are two pairs of membranous crests, carrying, on their inner aspect, some pencils of branched filaments. The middle of the stomach is covered with a fleshy ring, armed with horny lamine as sharp as a knife. The common species is found on Fucus natans, or gulf-weed, wherever this appears. Fig. 167.—Scyllwa pelagica Tue Guiaucus, Forster, Have the elongate body and the vents as in the preceding ; four minute conical tentacula ; and on each side [two or] three branchiz, each formed of long fringes ar- ranged like a fan, and by whose means they swim. They are little charming Molluscs of the Mediterranean and Indian Ocean, agreeably painted with azure-blue and silver, and swim with great quickness on their backs. Their anatomy closely resembles that of Tritonia. The species have not, as yet, been satisfactorily distinguished. The Laniogerus, Blainv., has, on each side, two series of little plates, finely divided in a pectinate manner, which are the branchia. The body is shorter and thicker than in Glaucus, but they have its four little tentacula. Tue Eoxipra, Cuv., RIE TES Cn acuerEOrnLees Resemble little slugs, with four tentacula above, and two on GASTE {0PODA TECTIBRANCHIATA. 353 the sides of the moutn. Their branchiz are tentaculiform processes or papille disposed along the sides, overlying like scales, [or held erect]. They inhabit all seas. The Cavolina, Bruguiére, have the habit of Eolidia, but their branchiz are disposed in rows across the back. The Flabellines, Cuv., still exhibit the tentacula of the preceding genera, with branchie composed of radiating filaments supported on five or six pedicles on each side. They approximate the Glaucus; and in general it is to be remarked, that all the Nudibranchiata with branchiz placed upon the sides of the back are nearly affined. THE TeRGIPEsS, Cuv., Are in shape like the Eolidia, but have only two tentacula, and along each side of the back there is a row of cylindrical branchiz, each terminated by a little sucker, which enables them to be used as feet : hence the creature can walk in a reversed posture. [This singular structure of the branchizx, and their pedes- trious use, requires to be confirmed.] The known species are very small. The Busiris, Risso, is known by its oblong body, convex back, two filiform tentacula, and behind them, upon the neck, two plumose branchiz. The Plocobranchus, Van Hasselt, has two tentacula, and two labial lobes, and the whole back, widened at the sides, covered with numerous radiating striz, which are the branchie. In their natural conditions, the widened margins of the cloak are raised, and overlap each other so as to form a covering to the branchiz, which are thus placed in a sort of cylindrical sheath. The only species yet known is from the shores of Java. THE THIRD ORDER OF THE GASTEROPODES. THE INFEROBRANCHIATA. These have nearly the habit and organization of Doris and Tritonia, but their branchie, instead of being situated upon the back, are on the sides of the body, under the projecting margin of the cloak, where they form two long series of leaflets. [The species are strictly littoral, being gasteropodous and incapable of swimming. | Tue Puyuuipia, Cuv. Their naked, and generally coriaceous cloak, is not protected by any shell. Their mouth is a small proboscis, and has a tentaculum at each side; two other tentacula protrude above from two little cavities of the cloak. The anus is in the hinder part of the cloak, and the orifices of generation under the right side in front. The heart is about the centre of the back ; the stomach is simple, membranous; and the intestine short. There are several species in the Indian ocean. Tue Dreuy.uipes, Cuv.— Have branchiz nearly similar to those of Phyllidia, but the cloak is more pointed behind ; the head, of a semicircular figure, has a pointed tentaculum on each side, and a slight tubercle: the anus is on the right side. (The Ancylus, Geoffroy,—a fresh-water Gasteropode, with a shell similar to that of a Patella, is placed by Rang in this order. He asserts that the animal is branchiferous, while the Rev. Mr. Berkeley has asserted that it is pul- monated. They live in stagnant waters and in rivulets, adhering to stones and aquatic plants. ] THE FOURTH ORDER OF THE GASTEROPODES. THE TECTIBRANCHIATA.* They have their branchie attached along the right side, or upon the back, in the form of more or less divided, but not symmetrical, leaflets ; these are more or less covered by the mantle, in which asmall shell is generally contained. They approximate the Pectinibranchiata * The Monopleurobranchiata of Blainville. AA 354 MOLLUSCA. in the form of the respiratory organs, and, like them, live in the sea; but they are hermaphro- dites, like the Nudibranchiata and Pulmonea. THe PLEUROBRANCHUS, Cuy.* The cloak and the foot both jut beyond the body, which thus appears as if it were between two bucklers. The former contains, in some species, a little oval calcareous plate ; in others, a horny one, and in either case it is situated above the head. The branchiz are placed along the right side, in a groove between the cloak and foot, and represent a series of pyramids divided into triangular leaflets. The mouth, in the form of a small proboscis, is overhung with an emarginate lip, and with two tubular cleft tentacula; the orifices of generation are before, and the anus behind the branchie. There are four stomachs, of which the second is fleshy, sometimes armed with osseous pieces, and the third is garnished with prominent longitudinal lamin. The intestine is short. There are different species in the Mediterranean and Indian Ocean, some of which are large and beautiful. [We have two British species. ] Tue PLevropraNcHa&A, Meckel (Pleurobranchidium, Blainv.),— Has the branchie and the orifices of generation situated as in Pleurobranchus ; but the anus is above the branchie ; the margins of the cloak and of the foot project but a little, and upon the front of the cloak are four short distant tentacula, forming a square which forces a comparison with the anterior disk of the Aceres. I find but one stomach, with thin parietes, which is a mere dilatation of the intestine. A greatly divided glandular organ opens outwardly behind the genital orifices. There is no trace of a shell. The only known species is from the Mediterranean. Tue ApiystA, Lin. The margins of the foot are turned up into flexile crests, and, surrounding the back on every side, they can be reflected over it. The head, supported on a neck of greater or less length, has the two superior tentacula hollowed like the ears of a quadruped, and two others of a flattened shape at the end of the inferior lip; the eyes at the base of the former. Upon the back we find the branchie in the form of complicated leaflets, attached to a broad membranous pedicle, and concealed by a little cloak, equally membranous, which contains a horny flat shell. The anus is behind the branchiz, and is often concealed under the lateral crests: the vulva is to the right in front, and the penis issues from under the right tentaculum. A groove, which extends from the vulva to the very extremity of the penis, conducts the semen thither in copulation. A membranous crop, of enormous size, leads into a muscular gizzard, armed inside with many cartilaginous and pyramidal bodies ; and this is followed by a third stomach beset with sharp hooks, and a fourth in the form of a cecum. The intestine is voluminous. These animals feed on sea-weed. A peculiar gland pours out, through an orifice near the vulva, a limpid humour, which is said to be very acrid in some species; and from the edges of the cloak there oozes in abundance a deep purple liquid, with which the animal discolours the water of the sea when it perceives danger to be at hand. Their ova are laid in long glairy entangled filaments, as slender as threads. There are found in our seas Apl. fasciata, Poiret, punctata, Cuy., and depilans, Linn. ; and the shores of foreign countries possess several others. Tue Dorasetis, Lam.— Differs only from Aplysia in the position of the branchiz at the posterior extremity of the body, which resembles a truncated cone. The lateral crest fits close to the branchial apparatus, leaving merely a narrow groove. The shell is calcareous. The species are found in the Mediterranean and in the Indian Ocean. Tue Norarcuus, Cuy.— Has the lateral crests united and covering the back, leaving merely a longitudinal fissure to conduct water to the branchie. These have no cloak to cover them, but in other respects they resemble the branchiz of the Aplysia; and the organization of the two genera is otherwise similar. In * The same as the Lamellaria of Montagu, {a name which the Botanists have usurped,] and the Berthella of Blainvilie. [This genus, Pleu- robranchea, Umbrella, Spiricella,and Siphonia, are placed in the preceding order by Rang.) Or GASTEROPODA TECTIBRANCHIATA. 35 Tae Bursatettes, Blainy.,— The lateral crests are united in front, so as only to leave an oval opening for the water to pass to the branchize which are also destitute of a covering cloak. It is, how- ever, probable that this genus should be allowed to lapse into the Notarchus.* Tue Aceres, (4kera, Muller)— Have the branchiz covered like the preceding genera, but their tentacula are so much shortened, widened, and sepa- rated, that there seems to be none at all, or rather they form together a large, fleshy, and nearly square buckler, under which the eyes are placed. Moreover, their her- maphroditism, the position of their sexual organs, the complexity and structure of the stomach, the purple liquid which several of them shed, all approximate them to the Aplysie. The shell, in such as have one, is more or less convolute, with a slight obliquity, without a visible spire, and the mouth has neither sinus nor canal; but as the Pete apne ene. columella is convex and protuberant, the mouth has a crescent-like shape, and the part opposite to the spire is always widest and rounded. When the shell is buried in the cloak, M. de Lamarck names the genus Bulla. The shell has few whorls, and is too small to contain the animal. The Bullea aperta, Lam., is an example which is found in almost every sea, where it lives on oozy bottoms. When the shell is [external], covered with a thin epidermis and sufficiently roomy, M. de Lamarck allows them to retain the old name Bulla. The Bulla lignaria, ampulla, and hydatis are examples, [distinguished not only by the characters of the shells, but by peculiarities in the armature of the stomach, which consists of two or three comparatively large osseous pieces or jaws of different shapes ineach. Of those of B. lignaria, Gioeni constituted a genus to which he assigned Fig. 170.—Bullea aperta. his own name; it is the Tricla of Retzius, the Char of Bruguiére, and disfigured our systems until the cheat was detected by Draparnaud.] I restrict the term Acera to such species as have no shell whatever, or merely a vestige of it behind, although the cloak has the external * form of one. The genus is the Doridiwm of Meckel ee - and Lobaria, Blainv. Thereis a small species in the Fig. 171. —Bulla lignaria. Fig. 172.—B. ampulla. Mediterranean (Bulla carnosa, Cuv.), whose stomach is as destitute of any armature as its cloak is of a shell, but the cesophagus is fleshy and very thick. Tue GastERoPTERON, Meckel,— Appears to be only an Aceres with the sides of the foot expanded into broad fins, by whose aid it is enabled to swim, which it does in a reversed position. It also has no shell, and no stony apparatus in the stomach. A very slight fold of the skin is the sole vestige of a branchial cover to be observed. The one species known (G. Meckelii) is a Mediterranean Mollusk, about an inch long by two in breadth, when its wings are spread out. Until a more ample anatomy has been made of it, we believe that it is in this order, and near to the Pleurobranchus, that the singular genus Umpretta, Lam. (Gastroplax, Blainv.)— Should be placed. The animal is a great circular Mollusk, whose foot exceeds by much the cloak, and has its upper surface roughened with tubercles. The viscera are in a superior and central rounded part. The cloak is only visible by its slightly projecting sharp edge along the entire front, and on the right side. Under this slight edging of the cloak are the branchiz, in lamellated pyramids, like those of Pleurobranchus; and behind them is a tubular anus. Under this same margin, in front, are two cover the back and the superior surface of the lobes under the form of * Aplysia viridis, Montag., raised to a genus by Oken under the avascular network, so that the true position of the Elysia is next to name of Acte@on, and which is at least nearly allied to the Elysia timida of Risso, has been cousidered as a near ally of Aplysia, but from want | Placobranchus.] of a knowledge of the branchiew, I cannot classify it. [The branchie AA 2 an a I a et Ce re ee 356 MOLLUSCA. tentacula, longitudinally cleft as in Pleurobranchus, and at their inner bases are the eyes: between them is a kind of proboscis, perhaps an organ of generation. There is a large concave space in the anterior margin of the foot, the edges of which can be drawn together like the mouth of a purse; and at its bottom is a tubercle pierced with an orifice, which is perhaps the mouth, and is surmounted by a fringed membrane. The inferior surface of the foot is smooth, and serves the animal to crawl on, as in other Gasteropodes. It carries with it a hard, flat, irregularly-rounded shell, thickest in the centre, with sharp margins, and lightly marked with concentric strize. It was supposed at first that the shell was attached to the foot, but more recent observations have proved that it is upon the cloak, and in its usual place. [Two species have been discovered: one in the Indian Ocean, the other in the Mediterranean. | THE FIFTH ORDER OF THE GASTEROPODES. THE HETEROPODA, Lam.* The Heteropoda are distinguished from all other Mollusca by their foot, which, stead of forming a horizontal disk, is compressed into a vertical muscular lamina, which they use as a fin; and on the edge of which, in several species, is a sucker in the form of a hollow cone, that represents the disk of the other orders. Their branchiz, formed of plumose lobes, are situ- ated on the hinder part of the back, and point forwards; and immediately behind them are the heart and liver, of inconsiderable size, with a portion of the viscera and the interior organs of generation. The body, of a transparent gelatinous substance, sheathed with a muscular layer, is elongate, and generally terminated with a compressed tail; the mouth has a muscular mass and a tongue garnished with little hooks; the gullet is very long; the stomach thin; two prominent tubes, on the right side of the bundle of the viscera, serve as passages to the excrements, and to the eggs or semen. They swim, in ordinary, in a reversed position; and they can inflate the body with water in a manner which is not yet well understood. Forskal comprised them all under his genus Pterotrachea, which it is necessary to subdivide. THE CarinariaA, Lam.,— Has the nucleus (formed by the heart, the liver, and organs of generation,) covered with a thin, sym- metrical, conoid shell, with the point curved backwards, and often raised into a crest; under its anterior margin, the plumes of the branchiz float; on the head are two tentacula, and the eyes are behind their roots. One species (Car. cymbium, Lam.) inhabits the Mediterranean; another the Indian Ocean (Car. fragilis, B. St. Vincent). The Argonauta vitrea of authors may be a Carinaria, but its animai is un- known. Tue ATLANTA, Lesueur, — From the observations of M. Rang, should be animals of this order, whose shell, in place of being expanded, has a narrow cavity, and a Fig. 173.—Carinaria: the shell of its natural size, and a reduced figure of spire rolled Uppon the same plane: its con- GAS STINE CARN TTS OEE) 40H GG AEA tour is raised into a thin crest. They are very small shells of the Indian Sea; and in one of them, Lamanon believed that he had found the original of the Ammonites. « M. de Blainville makes a family of this order, which he names ; Argonauta. [Sowerby has also contended for Argonauta being ar- Nectopoda, and unites them in his Nucleobranchiata with another | ranged near to Carinaria.] family named the Pteropoda, comprising, however, only Limacina of + Seea description of the animal by M. Verony in the Zool. Journ. my Pteropodes. He adds to it, upon I know not what conjecture, the | vol. v- p. 325.—Ep- GASTEROPODA PECTINIBRANCHIATA. 357 Tue Frroia, Peron,— Has the body, the tail, the foot, the branchiz, and the nucleus of the viscera, nearly the same as the Carinaria, but no shell has been observed. Their snout is prolonged into a recurved proboscis, and their eyes are not fronted with tentacula. There is often seen hanging at the end of their tail, a long jointed thread, which Forskal considered to be a Tape-worm, and the nature of which is not yet cer- tainly determined. One species (Pterotrachea coronata, Forsk.) is very common in the Mediterranean; and M. Lesueur has de- scribed several others from the same sea as different, but they require new and comparative examinations. Such as have the body abruptly truncate behind the visceral nucleus, instead of being terminated with a tail, M. Lesueur distinguishes as Firoloides. To these genera, now well known, I suppose we shall, on a better acquaintance with them, have to add the Timoriennes, Quoy & Gaym., which appear to be Firole deprived of their foot and nucleus of viscera; and the Monophores of the same naturalists, which have nearly the form of Carinaria, but are also footless and shelless, nor have any visceral nucleus. It is not so certain that we should place here the Phylliroes of Peron. The body, transparent and much compressed, has in front a snout surmounted with two long tentacula without eyes; behind, a truncate tail; and we can see through the integuments its heart, its nervous system, its stomach, and the genital organs of both sexes. The anus, and the orifices of the genital organs, are also on the right side, and a penis of considerable length is sometimes even protruded ; but I cannot perceive any other respiratory organ than its thin and vascular skin. THE SIXTH ORDER OF THE GASTEROPODES. THE PECTINIBRANCHIATA.* This order is, beyond comparison, the most numerous of the class, since it comprehends almost all the univalve spiral shells, and several which are simply conical. The branchiz, composed of numerous leaflets or frmges, ranged parallelly like the teeth of a comb, are affixed in one, two, or three lines (according to the genera) to the floor of the pulmonary cavity, which occupies the last whorl of the shell, and which communicates outwards by a wide gape between the margin of the cloak and the body. Two genera only—Cyclostoma and Helicina—have, instead of branchiz, a vascular network clothing the ceiling of a cavity im all respects the same as that of the order; and they are the only ones which respire the atmosphere, water bemg the medium of respiration to all the rest. All the Pectinibranchiata have two tentacula and two eyes, raised sometimes on pedicles; a mouth in the form of a proboscis, more or less lengthened ; and separate sexes. The penis of the male, attached to the right side of the neck. cannot, in general, be drawn within the body, but is retlected into the branchial cavity ; it is sometimes very large. The Paludina alone has the organ concealed, and it comes out through a hole pierced in the right tentaculum. The rectum and the oviduct of the female also creep along the right side of the branchial eavity ; and there is between them and the branchie a peculiar organ, composed of cells filled with a very viscous fluid, the use of which is to form a common envelope for the inclosure of the eggs, and which the animal deposits with them. The form of that envelope is often very complicated and very remarkable. The tongue is armed with little hooks [or curved spinules], and wears down the hardest bodies by slow and oft-repeated frictions. The grand difference between these animals lies in the presence or absence of the canal formed by the prolongation of the margin of the branchial cavity on the left side, and whieh * In M. de Blainville’s system, it f orms the subclass Paracephalophera divica. 358 MOLLUSCA. passes along a similar canal or sinus in the shell, to enao.e the animal to breathe without leaving its shelter. There is also this distinction between the genera—that some want the operculum; and the species vary in the filaments, fringes, and other ornaments that deck the head, the foot, or cloak. We arrange these Mollusca under several families from the form of their shells, which appears to be in sufficiently constant harmony with that of their respective animals. THE FIRST FAMILY OF THE PECTINIBRANCHIATA,— Tue TROCHOIDES,— Is recognized by their shell having an entire aperture, without sinus or canal for a siphon, which the animals have not*; and in being furnished with an operculum, or some organ as its substitute. THe Trocuusip® (Trochus, Linn.).t The mouth of the shell, angular at its exterior margin, approaches more or less to a quadrangular figure, and is in an oblique plane in relation to the axis of the shell, because that part of the margin next the spire advances more than the rest. The greater number of the animals have three filaments on each side of the cloak, or at least some appendages to the sides of the foot. ‘Among those which have no umbilicus, there are some in which the columella, in form of a concave arch, is continuous, without any projections, with the exterior margin. It is the angle and advance of this margin that distinguishes them from Turbo. These are the Tectaria, Montf. Several are flattened, with asharp [spiny] margin, whence they have been compared to the rowel of a spur; these are the Calear, Montf. Some again are a little depressed, orbicular, glossy, with a semicircular aperture and aconvex callous columella; Lamarck calls such Rotelia. Others have the columella marked near the base with a little prominence or vestige of a tooth, similar to that of Monodonta, from which these Trochoides differ only in the general shape of the aperture, which is, in the present instances, a little deeper than wide:—they are the Cantharides, Montf. The aperture in others is, on the contrary, much wider than deep, and their concave base gives them a resemblance to the Calyptree; these Montfort names Entonnoirs. Others, in which the aperture has the same great proportional width, have the columella in the form of aspiral canal. And those which have the shell turreted (Telescopium, Montf.) resemble the Cerithia. Among the umbilicated Trochuside, some have no longer any projection on the columella; the greater number are flattened, and have theexterior angle sharp. Of this kind is Trochus agglutinans, Linn., remarkable for its habit of gluing and incorporating with its shell, in proportion as it grows, different foreign bodies, such as gravel, frag- ments of other shells, &c. It often covers its umbilicus with a testaceous plate. There are some also with rounded margins, of which we have a common example on our coasts, (Tr. cinerarius, Linn.). Other umbilicated Trochi have a prominence near the base of the columella: and lastly, in others it is crenulated throughout its length. The Solarium, Lam., is distinguished from the other Trochi by its obtusely conical spire, whose broad base is perforated with a wide and deep umbilicus, in which the eye can trace the margins of all the whorls winding up [like an elegant miniature staircase], and prettily crenulated. The Huomphalus, Sowerby, are fossil shells similar to Solarium, but without crenulations on the inner whorls of the umbilicus. Tae PertwingLes (Turbo, Linn.)\— Comprise all the species with the shell perfectly and regularly turbinate, and of which the aperture is quite round. From a detailed examination of them, they have been greatly subdivided into genera. The Turbo, Lam., properly so called, have a round or oval thick shell, with an aperture completed on the side of the spire by the penultimate whorl. The animal has two long tentacula; the eyes raised on [short] pedicles at the exterior base; and, upon the sides of the foot, membranous expansions, either simple or fringed, or furnished with one or two filaments. To some of them those stony thick opercula belong which may be frequently observed in collections, and which were formerly used in medicine under the name of Unguis odoratus. Some are umbilicated (Meleagris, Montf.), and some are not so (Turbo, Montf.). The Delphinula is a shell as thick [and solid] as the Turbo, but subdiscoid, and its aperture is entirely formed by the last whorl, and without a varix. The animal resembles the Turbo. The common species (Turbo delphinus, Linn.) takes its name from the branched curved spines that arm the whorls, and which have given rise to a com- parison of it to a dried fish. The Pleurotoma, Defrance, are fossil shells with a round mouth, and a narrow deep incision on the outer margin. It is probable that this incision corresponds, as in Siliquaria, with some fissure of the cloak. M. Deshayes reckons already more than twenty-five fossil species. The Scissurelle of M. d’Orbigny are recent species. The Turritelia, Lam., have the aperture of Turbo, but the shell is thin and elevated into an obelisk, or turreted. * Hence Blainville denominates the order Asiphonobranchiuta. + Family Gorriostomata of De Blainville. GASTEROPODA PECTINIBRANCHIATA. 399 The eyes of the snail are on the exterior oase of the tentacula; the foot is small. There 1s a great number of fossil species ; and we ought to unite with it the Proto, Defr. The Scalaria has the turreted spire of Turritella, with the aperture of Delphinula, but the spire is covered with longitudinal, elevated, rather acute ribs, and the mouth is encircled with a varix. The tentacula and penis of the animal are long and slender. The principal species, the Turbo scalaris, Linn., or the Wentletrap, has long been famous for the high prices given for a specimen. It is distinguished by its whorls being separate from each other. A small species without this peculiarity (Turbo clathrus, Linn.), is common in the Mediterranean. We may arrange here some terrestrial or lacustrine subgenera, whose shells have an entire roundish operculated aperture. Of this number are the Cyclostoma, Lam., distinguished from all others by being terrestrious ; and in place of branchie, there is a vascular network on the parietes of the pulmonic sac.* In all other respects, Cyclo- stoma resembles the animals of this family. The spiral shell is finely striated in the direction of its rounded whorls, and, in the adult, the aperture is encircled with a small raised rim, and closed with a round thin opercu- lum. The Turbo elegans, Linn., found in woods, under stones and moss, is the type of the genus. The Valvata, Mull., live in fresh water. Their shell is obtusely conical, with a round operculated mouth ; and the snail, which has two slender tentacula, and eyes at their inner base, breathes by means of branchie. In our native V. cristata, Mull., the branchia, in the shape of a miniature feather, protrudes from under the cloak, and floats in the water with a vibratory motion, when the animal wishes to breathe.t On the right side there is a fila- ment that resembles a third tentaculum. The foot is two-lobed in front. The penis of the male is slender, and lies in the respiratory cavity. The shell, scarcely three lines in height, is corneous, obtuse, and umbilicated. It is necessary to classify here some purely aquatic snails, which formerly made a part of the genus Helix, since the shell had the crescent-like aperture that constituted the character of that genus.t The three first genera are nearly allied to Turbo. Thus THE Patupina, Lam.— Have been separated from Cyclostoma because they have no rim or varix round the aperture; because this, as well as the operculum, has a little angle above ; and because the animal, having branchiz, must live in water. It has a very short proboscis, two setaceous tentacula, eyes seated on the external bases, a small membranous fin on each side of the body in front, the anterior margin of the foot lobed, the fin of the right side folded into a small canal to introduce the water into the respiratory cavity, an approach to the siphon of the following family. In the common species (Helix vivipara, Linn.), the female is viviparous, and we find the young, in spring, in the oviduct, in all stages of developement. Spallanzani assures us that the young, kept separate from the moment of their birth, can give birth to others without having copulated, as happens with the Aphides. The males are, notwithstanding, as common as the females, their organ issuing from a hole in the right tentaculum, which is thus made larger than the other, and affords a character to know the sexes by. In the sea there are some shells that differ from Paludina only in their superior thickness. These are THe Lrrrorina, Feruss. The common species, or Periwinkle, swarms on our coasts, and is eaten. [The Lacuna of Turton is a Littorina with a perforation in the pillar.] The Monodon, Lam., differs from Littorina§ in having a blunt tooth at the base of the columella, which has in some also a fine incisure. Several are cre- nulated on the outer lip. The animal is more ornamented, carrying in general on each side three or four filaments as long as the tentacula. The eyes are elevated on pedicles on the outer side of the root of the tentacula. The operculum is round and horny. Trochus tesselatus, Linn., is an abundant example on the French coast. THE PHASIANELLA, Lam.— Have a shell similar in shape to that of Limneus and Bulimus, but the aperture is closed with a calca- reous operculum, and the base of the columella is sensibly flattened and without an umbilicus. The shells are much sought after by amateurs, from the beautiful speckled manner in which their various colours are disposed. Their snail has two long tentacula, with the eyes on tubercles at their exterior bases, double lips emarginated and fringed, as well as the lateral fins carrying each three filaments. [Planazxis, Lam., is nearly allied to Phasianella, from which, however, it may be distinguished by the truncation of the anterior part of the pillar. There are six species known, one of which is so common on the shores of the Isle of France that the rocks, in some places, are covered with 1t.] , + Hence Dr. Fleming was induced to institute the order Cervici- branchia for the genus, which he afterwards arranged with the Nudi- branchia.—Ep. t They constitute the family Ellipsostoma of De Blainville. § Sowerby more properly unites Monodon with Turbo.—Ep. * For this reason M. de Ferussac, with Cyclostoma and Helicina, makes a distinct order—his Pulmonea operculata, [which has been adopted by Rang and many other systematists ; and seems warranted by the anatomy of the former genus given by the Rev. Mr. Berkeley in the Zool, Journ. iv. p. 282.] 360 MOLLUSCA. THE AmMPULLARIA, Lam.— Has a roundish ventricose shell with a short spire, like most of the Helices; its aperture is higher than wide, furnished with a [calcareous] operculum, and the columella umbili- cated. They live in the fresh and brackish water of hot climates. The animal has long tentacula, and pedunculated eyes. At the bottom of the respiratory sac, by the side of the long branchial comb, there is, according to the observations of MM. Quoy and Gaymard, a large pouch filled with air, and which may possibly be a swimming bladder. The Lanistes, Montf., are Ampullarie with a wide spiral umbilicus.—The Heli- cina, Lam., from the shell, would seem to be Ampullarie with the rim of the aper- ture reflected, When this rim is sharp, the shells are Ampullines, Blainv., and when it is blunt, the Olygire of Say. There is one species (Helicina neritella, Lam.) remarkable for a white shelly edge on the inner side of the operculum. It appears that the organs of respiration are similar to Cyclostoma, and that the animals can live in the open air. [ The Helicine are iand shells. Mr. Gray has given amonograph of the genus in the Ist vol. of the Zoological Journal ; but since its publication, the number of species has been doubled. ]} Fig. 174.—Ampullaria rugosa. Toe MELAnie Have a thicker shell, with the aperture deeper than wide, which expands at the part opposite the spire. The columella has neither fold nor umbilicus. The spire varies greatly in its length. They live in rivers, but there is no species in France. The animal has long tentacula, and the eyes are placed about a third way up on their outer side. The Rissoa, Freminv. (Acmea, Hartm.) differs from Melania in having the rim of the aperture united all round. [** All we have met with are littoral shells, and several species abound on our shores.”’—Sowerby.—Melanopsis, Ferussac, with nearly the same form as Melania, has a callosity at the columella, and a vestige of an emargination near the base of the aperture, indicating a relationship with Terebra. The Pirena, Lam., have not merely this sinus, but another on the opposite side. Like the Melania, the two last subgenera live in the rivers of the south of Europe, and of warm countries, [‘‘ and yet most of the fossil species are found in beds that are considered by geologists, in this country, to be of marine formation.””—Sowerby.] We incline to refer to this place in the system two genera separated from the Volutes, and which have a considerable similarity to Auricula, but are operculated, and have only two tentacula. First, Acteon, Montf., (Tornatella, Lam.), with a convolute shell; and, secondly, Pyramidella, Lam., with a turreted shell, whose columella is obliquely twisted and plaited. Tue JANTaina*, Lam.— Is widely separated from all that precede by the form of the animal. The shell has some resemblance to our land snails, but the aperture is angular at its lower part and at its outer side, where, however, the angle formed by the union of the upper and lower halves of the outer lip, is much rounded in most of the species, and somewhat so in the common one: the columella straight and elongated, the inner lip turned back over it. The animal has no operculum, but carries under its foot a vesicular organ, like a congeries of foam-bubbles, of solid consistency, that prevents creeping, but serves as a buoy to support it at the surface of the water. The head is a cylindrical proboscis ; and is terminated with a mouth cleft vertically, and armed with little curved spines: on each side of it is a forked tentaculum. The shells are of a violet colour ; and when the animal is irritated it pours forth an excretion of deeper blue to tinge the sea around it. The Litiopa, Rang, is a small conoid shell without an operculum, the body-whorl larger than the spire, and the aperture entire. The animal lives on the gulf-weed, whence it can suspend itself by a thread like a spider from a ceiling; and by the same thread it can remount at pleasure to the surface of the weed. ] Tue Nerira, Linn.— Are shells with the columella in a straight line, which renders their aperture semicircular or semielliptical. It is generally large in proportion to the shell, but always closed perfectly with an operculum. The spire is almost obsolete, and the shell semi-globular.f Natice, Lam., are Nerite with an umbilicus. The animal of such as are known has a large foot, simple tentacula, the eyes sessile at their bases, and a horny [or shelly] operculum. [In Neritopsis, Sowerby, there is a broad notch or sinus in the columella, which distinguishes it from Natica and Nerita, whose forms it seems to combine in itself. ] © M, de Blainville makes this genus his family O.rystoma, + The genus Nerita, Linn., constitute the family Hemicyclostoma of Blainville. a GASTEROPODA PECTINIBRANCHIATA. 361 Nerita, Lam. (Peloronta, Oken), has no umbilicus. Their shell is thick, tne columella toothed, the operculum calcareous. The eyes of the animal are supported on pedicles at the sides of the tentacula; and the foot is mode- rate in size. There is but slight reason to distinguish among them the Velates, Montf., where the side of the columella is covered with a thick, swollen, calcareous layer; and the Neritina, Lam., in which the columella is toothless, and the animals are inhabitants of fresh waters. Some have, however, a delicately toothed columella, and among these is one whose spire is armed with long spines, (Clitho, Montf.). [The species of Nerite are very numerous. M. Lesson has brought one from Australia, where it lives abundantly upon trees! This fact ought to make us more than ever wary of separating the marine from the fluviatilespecies. Indeed, some real Neritine can live both in fresh and salt water, and others are altogether marine. | Recent observations induce us to arrange near to the Trochoides THE SECOND FAMILY OF THE PECTINIBRANCHIATA,— Tue CapuLoipEs, *— Which comprises five genera, four of which are dismembered from Patella. All of them have a widely open shell, scarcely turbinate, without an operculum, or emargination or canal. The animal is male and female, and resembles the other Pectinibranchiata. Their branchial comb is single, laid across the vault of the cavity, and its filaments are often very long. ' Caputus, Mont. (Péleopsis, Lam.)— Have a conical shell, with the summit recurved a little in spiral, whence they were for long piaced with the Patella. The branchie are in a series under the anterior margin of their cavity ; the proboscis is of considerable length ; under the neck is a much plaited membranous veil; there are two conical tentacula with the eyes at their base on the outside. Hipponyx, Defr., appear from their shell to be fossil Capuli, but are very remarkable for the base of calcareous layers on which they rest, and which has probably been excreted by the foot of the animal. [Hipponyx is a truly bivalve shell. ] CrepipuLa, Lam. Shell oval [variable], with an obtuse point obliquely inclined backwards towards the margin: the under-side is generally concave, and the inner lip forms a broad, flattish, sharp-edged, toothless, hori- zontal plate, which about half covers the aperture. The abdominal sac containing the viscera is upon this plate, the foot under it, the head and the branchiz in front. The branchize consist of a series of long filaments attached under the anterior margin of the branchial cavity. Two conical tentacula bear the eyes at their exterior bases. Pileolus, Sowerby, seem to be Crepidulz, of which the transverse plate occupies half of the aperture, but their shell has a greater resemblance to Patella. The few species known are fossil. Septaria, Ferus. (Navicella, Lam.), resemble the Crepidula, excepting that their summit is symmetrical, and turned down on the posterior margin, and their horizontal plate projects less. The animal has, moreover, a tes- taceous plate of an irregular shape, attached horizontally upon the superior surface of the muscular disk of the foot, and covered by the abdominal sac, which rests in part above. It is, probably, the analogue of an operculum» but does not fulfil its office, being in some degree internal. The animal has long tentacula, and at their outside are peduncles to support the eyes. They live in the rivers of warm countries. Catyprraa, Lam. Shell conoid, the cavity furnished with a lateral internal appendage, very variable in form, which is as it were the beginning of a columella, and is interposed in a fold of the abdominal sac. The branchiz are composed of a range of numerous hair-like filaments. Some have the appendage adhering to the bottom of the cone, folded itself into a cone, or tube, and descending vertically. Others have it placed almost horizontally, adhering to the sides of the cone, which is marked above with a spiral line, that gives to their shell some relation to that of the Trochus.f SrpHonartiaq, Sowerby. Dismembered from Patella, to which in general form and appearance it very nearly approaches, but its margin is a little more prominent on the right side, and it is hollowed underneath with a shallow groove which opens at this prominence, and with which a lateral hole in the cloak corresponds, to intro- * M. de Bainville inserts the most of them among his Paracephala- + [Mr. Broderip has described many species in the Ist vol. of the phora hermaphrodita, Fam. Calyptracea, but they seem to me to beall | Trans. of the Zoul. Society, accompanied with beautiful figures ; and dioicous. [It is necessary to arrange with them the Loftia of Gray, | Mr. Owen has given an excellent anatomy of the genus in the same which has a shell almost identical with that of Patella, but the animal | work.] is pectinibranchous. We have at least one native species, (Pat. Cle- t Apparently the same as the Gudinia of Gray.—Phil. Mag. April, landi).) 1824. 362 MOLLUSCA. duce the water to the branchial cavity placea upon the back, and closed in every other place, The respiratory organ consists in a few small leaflets, attached in a transverse line to the bottom of that cavity. The animal appears to have no tentacula, but only a narrow veil upon the head. _ There are species in which the shell shows no appearance of the groove, and would perfectly resemble a Patella were it not that its vertex is turned backwards. [We must observe, says Rang, that we have seen young Patellz to have the character of Siphonaria, and to preserve traces of it at a more advanced age: it is only then provisionally that we adopt this genus, and assign it a place among the Inferobranchiata. | Siegaretus, Adans. The shell is flattened, with an ample round aperture, and an inconsiderable spire, whose whorls enlarge very rapidly, and are visible on the inside. It is hidden during life in the fungous shield of the animal, which projects considerably beyond it, as well as the foot, and is the true mantle. We observe in front of this mantle an emargination and a semi-canal, the use of which is to conduct water into the branchial cavity, but which leave no impressions on the shell. The structure indicates a transition to the following family. The tentacula are conical, with the eyes af their exterior base: the penis of the male is very large. There are species on our own coasts. [This remark is erroneous, unless we consider Cuvier’s Sigaretus the same as Pleurobranchus. See some remarks on the confusion in the nomenclature of this genus by Mr. Gray, in the Zool. Journ.i. p. 428.] Coriocella, Biainv., is a Sigaretus with a horny and almost membranous shell, like that of Aplysia. THE Cryprostoma, Blainv.— Has a shell very similar to Sigaretus, supported, with the head and abdomen (which it covers), on a foot four times its size, cut square behind, and which produces in front a fleshy oblong part that constitutes nearly one half of its mass. The animal has a flat head, two tentacula, a broad branchial comb on the roof of its dorsal cavity, and the penis under the right tentaculum, but I have not seen ny emargination in the cloak. THE THIRD FAMILY OF THE PECTINIBRANCHIATA,— Tue BuccinoipEs,*— Have a spiral shell, the mouth of which has, near the end of the columella, a sinus or canal, for the passage of the siphon or tube formed by an elongated fold of the cloak. The greater or less length of this canal when it exists, the greater or less width of the aperture, and the various forms of the columella, afford characters for a division of the family into genera, which can be grouped in various ways. Tue Conss (Conus, Linn.)\— Are so named from the conical figure of their shells. The spire, either flat or slightly raised, forms the base of the cone, whose apex is at the opposite extremity: the aperture is narrow, rectilinear, or nearly so, extended from one end to the other, without protuberance or fold, either on the columella or the margin. The animal is of a thinness proportioned to the aper- ture through which it issues: its tentacula and proboscis are much elongated, and we find the eyes near the apex of the former, on the outside: the operculum, seated obliquely on the hinder part of the foot, is narrow, and too short to close the mouth of the shell. The shells of this genus are in general beautifully coloured, whence Fig. 175.—Conus generalis. it happens that they crowd our cabinets. Our seas produce only a very few species, [of which there is a full enumerationin Lamarck’s Histoire naturelle des Animaux sans vertebres. | ines MN ZY Z) yh =< rl | Tue Cowrtes (Cyprea, Linn.)— Have also a [concealed or] very short spire, and a narrow aperture extending from one end to the other ; but the shell, which is ventricose in the middle, and almost equally narrowed at both ends, forms * Coequal with the Paracephaluphora dioica siphonobranchiata of | genera with a narrow aperture, we do not intend to say that they are Blainville. nearest in affinity to the preceding family ; but we place them first + M. de Blainville unites in one family, named Angyostoma, the | because they exhibit the characters of the siphoniferous tribes in the Conus, Cyprxa, Ovula, Terebellum, and Voluta. In placing here the | most distinct manner, GASTEROPODA PECTINIBRANCHIATA. 363 an oval; and its aperture in the adult animal is transversely toothed on each side. The cloak is suffi- ciently ample to fold over and envelope the shell, which, at a certain age, it covers with a layer of shell of another colour ; and from this circumstance, joined to the change which the aperture undergoes, the full-grown shell may be mistaken for another species. The animal has moderate tentacula, with the eyes at their ex- ternal bases, and a thin foot without an oper- culum. The colours of the shells are very beautiful, and many species are found in our cabinets, though, with very few exceptions, they all inhabit the seas of tro- pical countries. {Bruguiéres was of opinion that the animal of the Cyprea, before it arrived at its complete growth, abandons its shell several times, to form another more fitted to its dimensions. This opinion is now relinquished. ] THE OvuLa&, Brug.— UES EASY Have an oval shell, with a narrow, lengthened aperture, as in Cypraa, but without teeth on the columellar side; the spire is concealed, and the two ends of the aperture are nearly equally emarginated, or equally prolonged into a canal. Linnzus con- founded them with Bulla, from which they were properly separated by Bruguicres. Their snail has a broad foot, an expanded cloak, which partly folds over the shell, a moderate and obtuse snout, and two long tentacula, on which we find the eyes at about the third of their length on the outside. Montfort restricts the name Ovu/a to such shells as are transversely denticulated on the outer lip; and he names those in which the two ends of the aperture are prolonged into a canal, and the outer lip is plain, the Volva. When this lip is also plain, without a prolongation on each side, he calls the genus Calpurna. TEREBELLUM, Lam.— Has an oblong [or subcylindrical] shell, with a narrow aperture, without plaits or grooves, and increasing regularly in width to the end opposite the spire, which is more or less salient, according to the species. The animal is not known. [On account of its hidden spire, Montfort separates the species named Convolutum, by Lamarck, to form his genus Seraphs, which seems to be unnecessary. | Tue Votutes (Voluta, Linn.)— Vary in the figure of the shell and of the aperture, but are recognized by the emargination without a canat which terminates it, and by the oblique plaits of the columella. Bruguiéres first separated from them the Oliva, so named from the oblong or elliptical form of the shell, whose mouth is straight, long, and sinuated opposite tothe short spine, and the plaits of the columella are numerous and similar to striz. The whorls are separated from each other by a narrow groove. These shells do not yield in beauty to the Cowries. Their animal has a large foot, the anterior part of which (in advance of the head) is separated by an indentation on each side: the tentacula are slender, and the eyes are on their side near the middle of their length. The proboscis, the siphon, and penis are tolerably long: they have no operculum. MM. Quoy and Gaymard have observed at the posterior part of the foot an appendage, which is laid in the furrow of the whorls. The remaining species of the Volutes have been subdivided into five genera by M. de Lamarck. The Volvaria nearly resemble Oliva in their oblong or cylindrical form; but their aperture is narrow, and its anterior margin rises even above the spire, which is extremely short. There are one or several plaits on the columella. Their polish and whiteness has induced the natives of some countries to string them into necklaces. There is a small fossil species in the environs of Paris. [According to Sowerby, Volvaria is entirely a fossil genus, of which two species are found in the environs of Paris, and one in the London clay at Hordwell.] Voluta, Lam., has an ample aperture, and a columella marked with some large plaits, of which the inferior is the strongest. Their spire varies much in its prominence. Some (Cymbium, Montf.; Cymba, Sowerb.) have the last whorl ventricose: their animal has a large, thick, fleshy foot, without an operculum; and over the head a veil, at the sides of which the tentacula issue. The eyes are seated on this veil, exterior to the tentacula. The proboscis is of considerable Jength, and the syphon has an appendage on each side of its base. The shells attain a great size, and several are very beautiful. [‘‘ The shells are ventricose, light, and buoyant, floating when placed upon their backs on water, and having when so placed a boat-like appearance. Their apex is rude, and without regularity of shape. They are sombre, and, for the most part, uniform in colour. They are covered with a smooth brown epidermis, which is, again, more or 364 MOLLUSCA. less coated with a vitreous covering or enamel-like glaze, probabiy secreted by the mantle. The columella is uniformly curved, and it is believed that none of the species have hitherto been found in the New World.”— Broderip.| [The Melo, Broderip, resembles Cymba; but its apex, instead of being shapeless and rude, takes a well-fashioned and spirally-marked form. The colouring of the shell is also more elegant and vivid.] Others (Voluta, Montf.) have the last whorl conoid, narrowing at the end opposed tothe spire. The foot is less than in the preceding genus. Their shells are often very remarkable for the beauty of the colours and patterns which are painted on their surface. [There is reason to believe that the genera Cymba, Melo, and Voluta, are viviparous. | Marginella, Lam., with the form of the Voluta, has the outer lip thickened and revolute. The sinus is slightly marked, According to Adanson, the foot is also less, and has no operculum. ‘The animal can partially cover its shell by raising the lobes of its cloak, The tentacula have the eyes upon the outer side at their base. M. de La- marck distinguishes among them the Colombelia, by the more numerous plaits on the shell, and by a swelling of the middle of the outer lip. It appears that there is no operculum. Mitra, Lam., has an oblong aperture with some large folds on its columella, of which those next the spire are the largest. Their spire is generally long and pointed. Several species are brilliantly spotted with red upon a white ground. Their animal has a small foot, tenta- cula of moderate length, with the eyes on the side one-third above the roots, and a moderate siphon; but it will often protrude a proboscis longer than the shell. [The genus Conohelix, of Swainson, has a form more conical than the typical Mitr ; but its claim to be a good genus is denied by Sowerby.] Can- Fig. 177.—Colombella. cellaria, Lam.—The last whorl ventricose, and the aperture ample and round, with a plate upon the columella: the spire is prominent, pointed, and the surface marked in general with cancel- lated strie. [According to Sowerby, this genus is nearly allied to Purpura. ] THe Wuetxs (Buccinum, Linn.)*— Comprise all the shells furnished with an emargination, or short canal, bent to the left, and whose columella is not plaited. Bruguiéres made four genera of them; viz., Buccinum, Purpura, Cassis, and Terebra ; which MM. de Lamarck and Montfort have still further subdivided. Buccinum, Brug., comprises the emarginated shells without any canal, the general form being oval, as well as the aperture. The animals where known have no yeil on the head,—a proboscis, two widely separate tentacula with the eyes on their outer bases, and a horny operculum. The siphon is prolonged beyond the shell. M. de Lamarck specially reserves the name Buccinum to such as haye the columella convex and naked, and the outer lip without ribs or varix. Their foot is moderate in size; their proboscis long and thick, and their penis often excessively large. [The shell of the remarkable genus named Trichotropis by Broderip and Sowerby, is turbinated and keeled; its aperture is wider and rather longer than the spire; the base entire: but imme- diately below the obliquely truncated columella there is an in- distinct canal. The shell is thin and delicate, covered with an epidermis forming numerous sharp-pointed bristle-like pro- cesses on the edges of the carinz outside the shell. The horny operculum is much smaller than the aperture. The animal resembles a Buccinum, differing from it principally in having only a very small fold of the mantle to line the nearly obsolete canal of the shell. There is a British species (7. borealis).] Nassa has the columella covered by a plate more or less thick and broad, and the emargination deep, but without a canal. The animal resembles that of Buccinum, and there are shells intermediate between the two genera. Lamarck names Eburna those which join to a smooth shell, without plaits on the lip, a pillar that is deeply and widely umbilicated. In general form their shell has a strong resemblance to the Olives. [There is no operculum.] The animal is unknown. The Ancillaria, Lam., has also asmooth shell, and at the base of the columella a striated appendage or varix, without an umbilicus, and without a groove round the spire. The animal, in such species as it has been observed in, is similar to that of Oliva, and has the foot even more developed. The same naturalist unites those which are ribbed in the direction of the whorls, under the generic name of Dolium: the lower whorl is very large and ventricose. Montfort again subdivides Dolium into the Dolium proper, where the base of the columella is as it were twisted ; and into Perdixv, where it is sharp. Their animai has a very large foot, dilated in front; a proboscis longer than its shell; slender tentacula; eyes at their exterior side near the base; the head without a veil, and the foot without an operculum. Harpa is easily recognized by the prominent ribs which cross the whorls, and of which the last forms a rim to the margin of the aperture. The shells are beautiful. The animal has a very large Fig. 173,—Buccinum undatum. Fig. 179.—Aneillaria, * Forms the family Entomostoma of Blainville. foot, pointed behind, widened in front, wnere it 1s marked with two deep emarginations. The eyes are on the sides of the tentacula, near the base. There is no veil nor operculum. (MM. Reynaud, and Quoy and Gaymard have observed that, under certain circumstances, the hinder part of the foot is spontaneously amputated.) We recognize the Purpura, Brug., by its flattened columella, pointed at the base, and forming there, with the outer lip, a canal excavated in the shell, but not projecting. The species were scattered among the Buccina and Murices by Lin- neus. Their snail is like that of Buccinum as now restricted. Some shells similar to Purpura, but in which we notice a spine on the outer margin of the canal, form the genus Licorna, Montf. (Monoceros, Lam.) Others in which the columella, or at least the lip, is garnished, in the full-grown shell, with teeth that narrow the mouth, constitute the Sista of the former, and the Ricinula of Lamarck. The Coneholepas, Lam., has also the general characters of the Purpura, but the aperture is so enormously large and the spire so inconsiderable, that the shell has the aspect of a Capulus, or of one of the valves of an Arca. The emargination of the mouth has a small tooth on each side of it. The ani- mal resembles that of Buccinum, excepting in the foot, which is enormous in width and in thickness, and which is attached to the shell by a muscle in form of a horse-shoe, as in Capulus. There is a thin, narrow, horny operculum. A species from Peru (Buccinum concholepas, Brug.) is the only one known. Cassis, Brug.—Shell oblong; the aperture oblong or narrow; the columella covered with a plate as in Nassa, and that plate grooved transversely as well as the outer lip: the emargination ends in a short canal, which is folded and turned up backwards, and to the left. There are often varices. [The shells are called Helmets by English collectors, and are in general remarkable on account of their great size.] The animal resembles that of Buccinum, but its horny operculum is toothed, that it may pass between the grooves of the outer lip. Some have the varix of this lip toothed externally near the emargination; and others have it plain. The Morio, Montf. (Cassidaria, Lam.) are separated from the Cassis because their canal is less abruptly curved back; and they lead us to certain of the Murices. The animal resembles a Buccinum also, but its foot is more developed. {Oniscia, Sowerby, is sufiiciently distinguished from Cassidaria by its granulated inner lip, its very short, scarcely reflected canal, and its very singular general form, which is oblong or subcylindrical, with an obtuse apex. Strombus oniscus, Linn., is the type of the genus.] Terebra, Brug., have the mouth, the emargination, and the columella of Buccinum, but their spire is drawn out so as to be turriculated or subulate. [The species are numerous and beautiful.] The Subula, Blainv., is distinguished by some difference in the animal, and by the existence of an operculum. GASTEROPODA PECTINIBRANCHIATA. 365 | NN i” io i Fig. 181.—Cassis tuberosa. Tue Crerituium, Brug.,— Dismembered with good reason from the Murex of Linneus, Fig. 182.—Cassidaria echinophora. have a shell with a turriculated spire, an oval aperture, and a short but distinct canal curved to the left and back- wards. There is a veil on the head of the animal, two distant tentacula, having the eyes at the side, and a round, horny operculum. Many of them are found in a fossil state. M. Brongniart has separated from Cerithium the Potamides, which, with the same form of shell, have a very short, scarcely emarginate canal, no sinus or gutter near the top of the right lip, and the exterior lip dilated, ‘They live in rivers, or at least at their mouths; and some of them are fossil in formations where there are no other than land or freshwater species. Fig. 183.—Ceritheum. ett 366 MOLLUSCA. iHE Murex, Linn.*— Embraces alll shells whose canal is elongate and straight. I have found in the animals of all the sub- genera a proboscis ; approximated long tentacula, with the eyes external at their base; a horny oper- culum, and no veil over the head: they otherwise resemble the Buccina, except in the length of the siphon. Bruguicres divided them into two genera, subsequently subdivided into others by Lamarck and Montfort. Murex, Brug., are all shells with a salient straight canal, and with varices across the whorls. M. Lamarck reserves this name specially to those in which the varices are not contiguous, so as to make two opposite rows. If their canal is long and slender, and the varices are armed with spines, they belong to the Murex of Montfort. If the varices are merely nodulous, they constitute his Brontes. Some, with a canal of moderate length, have projecting tubes between the spinous varices which penetrate the shell; and these are the Ty- phis, Montf. The Chicoracea of the same have, instead of spines, the varices garnished with plait- ed leaves, torn or divided into branches: their canal is long or moderate, and their foliaceous productions. vary infinitely in shape and complexity. When, with a moderate or short canal, the varices are only nodulous, and when the base has an umbilicus, the shell becomes an Aquilla, Montf. We have several species on our coasts. If there is no umbilicus, that marks the genus Lotorium. Lastly, when the canal is short, the spire raised, and the varices simple, the shell is a Tritoniwm. The mouth is generally grooved trans- versely on both sides. We have some large species in our seas. [The 7. variegatum is much valued by the inha- bitants of some of the South Sea islands.] There are of them some with numerous, compressed, almost mem- branous varices,—the Trophones, Montf.; and in others they are much compressed and very prominent, but few in number.t M. de Lamarck separates from all the Murices of Bruguiéres the Raneila. Its character is to have the varices opposite, so that the shell is as it were girded with a border on two sides. Their canal is short, and the surface is roughened only with tubercles. The margins of their aperture are furrowed. The Apolles, Montf., are merely umbilicated Ranelle. Fusus, Brug., includes all the shells of this family which have no varices. When the spire is prominent, the pillar without plaits, and the margin entire, this is the Fusws of Lamarck, which Montfort has still further restricted, for he reserves this name to such as have no umbilicus. The less elongated and more ventricose species gradually approximate to the Buccina in their shape, and where they have an umbilicus, Montfort calls them Lathires. The Struthiolaria is another subgenus, distinguished by the inner lip being thickened and spreading over the lower part of the last volution and the columella, and in the adult the outer lip is thickened and turned outward,—a character that connects them with the Murex. When the spire is raised, the columella without plaits, and when there is near the top of the aperture, on its outside, a well-marked sinus or fissure, we have the characters of Pleurotoma, Lam. When this sinus is wide and touches the spire, some have seized the too slight distinction to make the genus Clavatula. When the spire is depressed, and the pillar without plaits, these are the Pyrula, Lam., which are either umbilicated or not. Montfort separates from Pyrula the species with a flattened spire, and which are striated within the mouth, to call them the Fulgur. They are in some degree Pyrule with a plaited columella, and the plaits are sometimes even scarcely perceptible. Amid these dismember- ments of the Fusus, Brug., we distinguish the Fasciolaria, Lam., by some oblique and distinct folds on the columella, near the origin of the siphon. Turbinella, Lam., are likewise shells with a straight canal, without varices, distinguishable by having [from three to five] prominent, compressed, transverse folds, all nearly equal in size, near the centre of the columella, and which approximates them to the conical Volute: in fact, they only differ by the superior elongation of the syphonal canal, [and in having an operculum, as well as a thickish epidermis]. Fig. 184.—Murex tenuispina. Tur SrromBusip& (Strombus, Linn.)— Comprise the shells with a canal either straight or bent to the right, the external lip of the aperture becoming, in its maturity, more or less dilated, and always marked with a sinus near the siphonal canal, whence the head issues when the animal comes out. In the greater number this sinus is at some distance from the canal. * Coequal with the family Siphonostoma of M. de Blainville. + It is to be regretted that Cuvier should have given even the appearance of a sanction to these new genera of Montfort.—Ep. GASTEROPODA TUBULIBRANCHIATA. 367 M. de Lamarck subdivides these species into two suogenera. His Stromous have the outer lip dilated into awing of more or less expanse, but not divided into digitations. The foot is proportion- ably small, and the tentacula support the eyes upon a lateral peduncle larger even than the tentaculum itself. The operculum is horny, long, and narrow, resting upon a thin tail. Pteroceras, Lam., have the mar- gin of the full-grown shell divided into long, slender digitations, varying in number ac- cording to the species. The animal is the same as in Strombus. Other Strombuside have the sinus con- tiguous to the siphon. These are the Ros- tellaria, Lam. They have generally a second canal mounting up the spire, and formed ” by the external lip, and by a continuation of the columella. In some of them the lip is digitated. Their animal resembles that of the Muricide ; but the operculum is very small. Others have merely denticulations on the lip: their canal is long and straight. Others have the margin entire and plane ; and these are the Hippocrenes, Montf. Ww" Fah ZAMAN 4 Fig. 185.—Pteroceras Scorpio. THE SEVENTH ORDER OF THE GASTEROPODES. THE TUBULIBRANCHIATA.* They ought to be detached from the Pectinibranchiata, with which they have nevertheless many affinities, because their shell, m the shape of a more or less nregular tube, and only spiral at its apex, is permanently fixed to other bodies. Thus they have not organs of copulation, and must fecundate themselves. Vermetus, Adanson,— Has a tubular shell, whose whorls, at an early age, still form a kind of spire ; but they are continued on in a more or less irregularly twisted or bent tube, like the tubes of a Serpula. The shell usually attaches itself by interlacing with others of the same species, or by becoming partially enveloped by lithophytes. The animal, having no power of locomotion, is deprived of a foot, properly so called; but the part which in ordinary Gasteropodes forms the tail, is here turned under, and extends forwards, even beyond the head, where its extremity becomes inflated, and furnished with a thin, [horny, multispiral] oper- culum. When the animal withdraws into its shell, it is this inflated mass which closes the entrance. It has sometimes different appendages ; and the operculum is spiny in certain species.| The head is obtuse, furnished with two tentacula of moderate size, having the eyes on the outside at their base. The mouth is a vertical orifice: under it we see, on each side, a filament which has all the appearance of a tentaculum, but which really belongs to the foot. The branchie form a single [pectinated] line along the left side of the branchial ceiling. Its right side is occupied by the rectum, and by the spermatic canal, which is also the oviduct. There is no male organ. The species are pretty numerous, but ill defined. Linnzus left them among the Serpule ; and the Vermilia, which Lamarck still allows to stand near Serpule, do not differ from the Vermetus. [This remark is erroneous ; Vermilia is a true Annelide, and should be left where Lamarck has placed it. ] Maaitus, Montf.— Has its tube keeled its whole length. At first it is pretty regularly spiral, and then is extended in a more or less straight line. Although we do not know the animal, it is probable that its place will be found to be near Vermetus. [The shell is found inclosed in madrepores, bnt not attached to them in any degree. It would appear that when quite young the animal takes up its station in a hollow part of * (The genera of this order are arranged amongst the Pectinibran- + [This observation is erroneous, and has probably arisen frora mis- chiata by Rang taking some opercala of Serpule for those of a Vermetus.] 368 MOLLUSCA. the madrepore ; and, increasing itself in size and length as the madrepore increases around it, it keeps the aperture even with the outer surface of the coral, and thus grows, in some instances, to a consi- derable length. This singular testaceous parasite is common in the coral rocks of the Isle of France, and its tube sometimes reaches the length of three feet. ] SiriquariaA, Brug.— Resembles Vermetus in the head, the position of the operculum, and in the tubular and irregular shell ; but there is a fissure on the whole length of the shell which follows its contour, and which corres- ponds with a similar cleft in that part of the cloak which covers the branchial cavity. Along the whole side of this cleft is a branchial comb, composed of numerous delicate and tubular-like leaflets. Linneus left these shells also in Serpula; and until a very recent date they were believed to be mem- bers of the class Annelides. [The remarkable operculum is similar to the pod of a Medicago, consisting of a spiral lamella rolled five times round an axis like a pulley. This horny lamella is very lustrous underneath, farinaceous or subpubescent above, and subcrenate on the under side of the rim, with short striole. It is convex m the centre, and the projection is multilocular, very exactly resem- bling a Cristellaria or Robulina. | THE EIGHTH ORDER OF THE GASTEROPODES. THE SCUTIBRANCHIATA.* The order comprises a certain number of Gasteropods having a considerable resemblance to the Pectinibranchiata in the form and position of the branchiz, as well as in the general form of the body, but they are complete hermaphrodites. Their shells are very open, without an operculum, and the greater number are not in any degree spiral, so that they cover their animals, and particularly the branchie, in the manner of a shield. The heart is traversed by the rectum, and receives the blood by the two auricles, as in the majority of the Bivalves. Tue Haxrorripes (Haliotis, Linn.)— Are the only family of this order in which the shell is turbinated ; and from those shells it is distin- guished by the excessive amplitude of the aperture, and the flatness and smallness of the spire, which is seen from within. This form has caused it to be compared to the ear of a quadruped. In the Haliotis, Lam., the shell is perforated along the side of the columella with a series of holes; and when the last hole remains incomplete, the shell has the appearance of being emarginate. The snail is one of the most richly adorned of Gasteropods. A double membrane, with a furbelowed margin, and furnished with a double row of filaments, extends, at least in the commonest species, round the foot, and on to the month: outside its long tentacula are two cylindrical pedicles, which support the eyes. The cloak is deeply cleft on the right side, and the water, which passes through the holes of the shell, gains access, by the medium of the cleft, to the branchial cavity. Along the margins of the cleft there are also three or four filaments, which the animal can also protrude through the holes of the shell. The mouth is a short proboscis. Padolla, Montf. [Stomatelia, Lam.] has an almost circular shell; almost all the holes obliterated; and a deep groove that follows the middle of the whorls, and shows itself exteriorly by a corresponding ridge. Slomatia, Lam., have a more concave shell, with a more prominent spire, and without holes : they otherwise resemble the Haliotis,and connect that genus with certain kinds of Turbo. The animal is less adorned than Haliotis.} The following genera, dismembered from Patella, have the shell quite symmetrical, as well as the posi- tion of the heart and branchiz. FissuRELLA, Lam.— Have a broad, fleshy disk under the belly, as the Patella ; a conical shell placed over the middle of the back, but not covering it completely, and perforated in the summit with a small aperture, which serves both for the passage of the excrements, and of the water necessary to respiration: that aperture pene- trates into the cavity of the branchiz situate over the front of the back, at the bottom of which the anus opens ; and this cavity is moreover widely patulous over the head. There is a branchial comb on each * M. de Blainville unites this and the following order in his sub- | neritoid thin shell with a wide entire aperture, without an operculum. class Paracephalophora hermaphrodita, His Stylina (Stylifer, Broderip) has also no operculum, but the spire + (Padola and Stomatia (that constitute but one genus, according | is pointed and acute. One species lives on the Echinus ; another im- to Sowerby,) are placed in the order Pectinibranchiata by Rang, where | beds itself in Starfish.] we find also next them the Velutina of Flemming, distinguished by its a ee eee ee ACEPHALES. 369 side of it, and the combs are alike: the conical tentacula have their eyes at their external base: the sides of the foot are garnished with a row of filaments. Emarginula, Lam., has exactly the same structure as Fissurella; but instead of a hole in the apex, its cloak and shell have a little cleft or emargination on their anterior side, which also penetrates into the branchial cavity. ‘The margins of the cloak envelope and in a great measure cover those of the shell: the eyes are on a tubercle at the outer bases of the conical tentacula; and the sides of the foot are as usual ornamented with filaments. Parmophorus, Lam. (Scutwm,Montf.)—As in Emarginula, the shell is covered, in a great measure, by the turned- up margins of the cloak: the branchie and other organs are the same as in the two preceding genera; but the oblong, slightly conical shell has neither hole nor emargination. [Sowerby unites this with the preceding genus. ] THE NINTH ORDER OF THE GASTEROPODES. THE CYCLOBRANCHIATA.* These Mollusks have their branchiz in the form of. little leaflets or pyramids, attached in a circle, more or less complete, under the margins of the cloak, very nearly as in the Inferobran- chiata, from which they are distinguished by the nature of their hermaphroditism; for, as in the preceding order, they have no organs for copulation, and impregnate themselves. Their heart does not embrace the rectum, but varies in its position. We know only two genera, whose shell never exhibits even a trace of a spire. Tue Limeers (Patella, Linn.)— Have the body entirely covered with a conical shell; and under the margins of their cloak there is a circle of branchial leaflets. The anus and the orifice of the organs of generation are a little to the right above the head, to which there is a thick, short proboscis, and two setaceous tentacula, having the eyes at their exterior bases: the mouth is fleshy, and contains a [very long ribbon-like] spinous tongue, which is directed backwards, and lies folded deep within the interior of the body. The stomach is membranous, and the intestine long, slender, and much convoluted. The heart is in front above the neck, a little to the left. Some species occur in abundance on our shores. THE Cuitons (Chiton, Linn.)— Have a series of testaceous symmetrical plates set along the back of their cloak, but not occupying all its breadth. The margins of the cloak itself are coriaceous, either naked, or chagreened, or gar- nished with spines, or hairs, or bundles of bristles. Beneath this margin, on each side, is a row of lamellated branchie ; and in front, a membranous veil over the mouth holds the place of tentacula. The anus is under the posterior extremity. The heart is situated behind, upon the rectum. The stomach is membranous, with a long convoluted intestine. The ovary lies above the other viscera, and appears to open upon the sides by two oviducts. There are some small speceies on our shores; but in the seas of tropical countries they attain a much greater size. (The Chitonellus, Lam., distinguished by the valves being so small as only partially to cover the cloak, should be re-united to Chiton, which, in the system of Blainville, forms a separate class, named Polyplaxiphora, and which, he supposes, leads the way to the Articulated Animals.) THE FOURTH CLASS OF MOLLUSCA. THE ACEPHALES.t+ The Acephales have no apparent head, but a mouth only, concealed in the bottom, or between the folds, of their cloak. The latter is almost always doubled in two, and incloses the body as a book is inclosed between its covers ; but it frequently happens to discover it, nor indeed to see any other organ of respiration except that of a cord of leaflets which encircles the body under the margins of the cloak. * In the system of Blainville the Cyclobranchiata is an order that embraces the Doris. With the last three genera of the preceding order, and with the Patella, he makes his order Cervico-branchiata, divided into the Retiferes and Branchiferes: the Retiferes are the + M. de Blainville unites my Acephales and Branchiopodes in one Patelle ; for he supposes that they breathe by means of a vascular | class, his 4eephalophora. network in the cavity situated above the head. I have not been able 370 . MOLLUSCA. that, in consequence of the two lobes uniting in front, the cloak forms a tube, or a sac when it is only closed at one end. ‘This cloak is generally provided with a calcareous bivalve, and sometimes multivalve, shell ; and in two families only is it reduced to a cartilaginous, or even membranous nature. The brain is over the mouth, where we also find one or two other ganglia. The branchie usually consist of large lamelle, covered with vascular network, under or between which the water passes: they are more simple, however, in the genera without a shell. From these branchie the blood proceeds to a heart, generally single, which distributes it throughout the system, returning to the pulmonary artery without the aid of another ventricle. The mouth is always toothless, and can only seize upon such particles as the water floats within reach. It leads into a first, and sometimes a second, stomach: the intes- tine varies much in length. ‘The bile is poured, generally by several pores, into the stomach, which the liver surrounds. All fecundate themselves ; and in several of the shelled species the young, which are innumerable, are retained for some time between the lamine of the [external] branchiz before they are expelled.* All the Acephales are aquatic. THE FIRST ORDER OF THE ACEPHALES. THE TESTACEOUS ACEPHALES}F (or A. WITH FOUR BRANCHIAL LEAFLETS). They are beyond comparison the most numerous. All bivalve shells, and some kinds of multivalyes, belong to them. Their body, which includes the liver and the viscera, is placed between the two layers of the cloak; and in front, still between the same layers, are the four branchial leaflets, regularly striated crosswise by the vessels. The mouth is at one extremity, the anus at the other. The heart is towards the back. ‘The foot, when there is one, is attached between the four branchize. There are four triangular laminz at the sides of the mouth, which are the extremities of two lips, and are used as tentacula. The foot is merely a fleshy mass, moved by a mechanism similar to that of the tongue of mammiferous animals: it has its muscles fixed in the bottom of the valves of the shell. Other muscles, which form sometimes one, sometimes two masses, go straight across from one valve to the other, to keep them closed; but when the animal relaxes these muscles, an elastic ligament situated behind the hinge opens the valve by its contraction. A considerable number of Bivalves possess what is called a byssus, that is, a bundle of more or less delicate filaments issuing from the base of the foot, and by means of which the animal fixes itself to foreign bodies. It employs the foot to guide the filaments to the proper place, and to glue them there: and it can reproduce them when they have been cut away; but nevertheless their true nature is not yet well ascertamed. Reaumur believed them to be spun from a secretion, and moulded in the groove of the foot. Poli thinks them to be merely pro- longations of tendinous fibres. The shell consists of two valves connected by a hinge, which is sometimes simple, and some- times composed of a greater or less number of teeth and lamin, that are received into cor- responding sockets and cavities. In a few genera, some supernumerary pieces are laid over the hinge. In general the valves have, ieaning over the himge, a prominent [subspiral] part, which is named the summit, or the nates. In the greater number the valves close perfectly when the animal chooses to draw them * Some naturalists, as Jacobson, have maintained that the minute | rent species. This opinion is now generally considered as erro- bivalves which, in certain seasons, load the external branchiw of the | neous. freshwater Mussel, are uot the foetal young, but parasites of diffe- + The class Conchifera of M. de Lamarck. en —— _—— o ACEPHALA TESTACEA. Bayi together; but there are several which always gape, even when brought as nigh together as possible, either at one or at both ends. THE FIRST FAMILY OF THE ACEPHALA TESTACEA,— Tue OystTEers,— Have the mantle open, with neither tubes nor particular apertures. They have no foot, or only a very smail one, and are for the most part fixed either by [cementation of] their shell, or by their byssus, to rocks and to other submarine bodies. Those which are free can move only by squirting out the water by a sudden closure of the valves. Their first section has but one muscular mass passing from one valve to the other, as we see by the single impression left upon the shell. It is supposed that we ought to arrange here certain fossil shells, whose valves do not seem to have been connected by a ligament*, but to have covered each other like a vase and its lid, and to have been held together by the muscles only. They form the genus Acardium, Brug., or Ostracite, La Perouse, of which De Lamarck makes the family Rudistes. The shells of it are thick, and of a solid or porous texture. We now distinguish in it the Radiolites, Lam., whose valves are striated from the centre to the circumference. One of them is flat, and the other thick, nearly conical, and fixed. The Spheru- lites, Lametherief, with the valves roughened with foliations that rise up unequally. And it is guessed we may place here the Calceole}, of which one valve is conical, but free, and the other flat, or even some- what concave, so that they call to recoilection the figure of a shoe : and the Hippurites, with one valve conical or cylindrical, that has on its inside two obtuse longitudinal crests: its base appears even to have been divided into several chambers by transverse partitions ; the other valve forms, as it were, a lid. The Batolithes, Montf., are cylindrical and straight Hippurites ; they are often ney long ; but there remains much uncertainty on the nature of all these fossils. As to the Testaceous Acephales, known in a living state, Linnzeus had united under the genus OstrREA (the Oysters)— All those which had neither teeth nor transverse laminz in the hinge, the valves being held together by a ligament lodged in a little cavity on both sides. The Ostrea, Brug., has the ligament as just described, and their shells are irregular, inequivalved and foliated. They are affixed to rocks, to stakes, and even to one another, by the most convex of the valves. The animal (Peloris, Poli) is one of the simplest of bivalves: we observe on it nothing remarkable but a double series of ciliz round the margin of the cloak, which has the lobes united only above the head near the hinge: there is no appear- ance of afoot. Every one is familiar with the common Oyster (O. edulis, Linn.), which is fished and reared in arti- ficial beds. Its fecundity is as astonishing as its taste is agreeable. [Poli says that the ovaries of a single oyster contain 1,200,000 ova.] Among the species of neighbouring countries we may notice the Os. cristata of the Medi- terranean ; among those of distant lands, the Os. parasitica, which fixes itself upon the roots of the mangroves and other trees that grow within the reach of the salt water ; and the Os. foliwm, which is attached by the denticu- lations on the back of its convex valve, to the branches of the Gorgonia and other lithophytes. M. de Lamarck separates, under the name of Gryphea, certain Oysters, principally fossil, the apex of whose most convex valve projects much, and is either hooked orin some degree spiral. The other valve is often concave. The greater number of the species appear to have been free, but some of them have been seemingly attached by their hooked apices. We know only one recent species (Griph. tricarinata). [Sowerby reunites Gryphxa to Ostrea.] The Clams (Pecten, Brug.) have been properly removed from the Oysters, although they have a similar hinge. They are easily distinguished by their inequivalve semicircular shell being almost always regularly marked with ribs, which radiate from the summit of each valve to the circumference, and furnished with two angular productions called ears, that widen the sides of the hinge. The animal (Argus, Poli) has a small oval foot supported on a cylindrical peduncle, in front of an abdomen in form of a sac hanging between the branchiz. In some species, known by the strong sinus under their anterior ear, there is a byssus. The others are not adherent, and can even swim with considerable velocity, by flapping their valves together. The cloak is surrounded with two rows of fila- ments, several of those of the exterior row being terminated by a little greenish globule [with a metallic lustre]. The mouth is garnished with many branched tentacula instead of the four usual labial laminw. The shell of the clams is often coloured in a lively manner, [and many species are remarkable for the difference in colouring * [M. Desmoulins has endeavoured to prove that these shells form + Spherulites now embraces the Radiolites and Birostrites of Lam., a class intermediate between the shelless Acephales and the Cirrho- with Jodamia of Defrance.—En. podes. Deshayes, on the contrary, asserts that they are true Bivalves, t [Sowerby and Rang maintain that Calceola is mach more nearly allied to Chama. Bainville and Rang collect them into a distinct or- | allied to Terebratula.] der of Bivalves, under the name of Rudistes.] BBZ gS a a ES oe 372 MOLLUSCA. opservable in the two valves.] The large species of our coasts (Ostrea maxima, Linn.), 18 the Pilgrim’s shell, [worn in front of the hat by those who had visited the shrine of St. James in the Holy Land.] It is eaten. The Lime (Lima, Brug.) differ from the Pectens in having a more elongated shell, with shorter ears, and a greater inequality of the sides. The majority have the ribs raised into scales. The valves cannot be closed in the living state, and the cloak is ornamented with a vast number of filaments of different lengths, without tubercles ; and further within there is a broad fold which closes the gape of the shell, and even forms a protuberant veil. The foot is small, and the byssus inconsiderable. The Lime swim rapidly, by flapping their valves. One species in the Mediterranean, of a pure white colour (Ostrea Lima, Linn.), is eaten. Pedum, Brug.—The shell is similar to Lima, but the valves are unequal, and the most convex only has a deep sinus for the byssus. The animal also is very like that of Lima, but its cloak has only a single row of small slender tentacula. Its byssus is larger. The one species known is from the Indian sea. Certain fossils may be placed here which have the hinge, ligament, and central muscle of the Ostrez, Pectines, and Lime, but are distinguished by some peculiarities of the shell. The Hinnites, Defr., seem to be Oysters, or Clams, with small ears and adherent shells, irregular and very thick, especially the convex valve. There is a fossa at the hinge for the ligament. (Four recent species of this genus have been described.) The Plagiostomes, Sower., have the oblique shell of the Lime, flattened on one side, very minute ears, the valves more ventricose, striated, without scales, and the outlet of the byssus less. They are found in formations older than the chalk. The Pachytes, Defr., have nearly the figure of the Pectines, a regular shell with small ears ; there is a transverse flat space between their summits, which has a strong triangular emargination in one of the valves, through or in which the ligament passes or is lodged. The Dianchores, Sower., have unequal oblique valves, one of them adherent and perforated in the summit, the other free and eared. The Podopsides, Lam., have regular striated valves, without opercula: one has the apex more prominent than the other, truncated and adherent ; this apex is often very thick, and forms a kind of stalk to the shell. (M. de Blainville regards the preceding four genera as nearer allied to Tere- bratula; and M. Deshayes, on the contrary, approximates them to Spondylus.) Although multivalve, we should approximate THe ANomi&, Brug.,— To the Oysters. They have two thin, unequal, irregular valves, the flattest of which is deeply notched on the side of the ligament, which is similar to that of the Ostrea. The greater part of the central muscle traverses this opening, to be inserted into a third plate, that is sometimes calcareous and sometimes horny, by which the animal adheres to foreign bodies ; and the remainder of the muscle serves to join one valve to the other. The animal (Echion, Poli) has a small vestige of a foot, similar to that of a Pecten, which glides between the emargination and the plate that closes it, and perhaps serves to direct water to the mouth, which is adjacent. Their shells are found attached to various bodies, like Oysters. They are found Fig. 186.—Anomia epbippium in every sea. [Placunomia, Sowerby, is the link which connects Anomia with the following genus. With an arrangement of the hinge, approaching very nearly to that of Placuna, we have the distinguishing organization of Anomia, while the external appearance of the shell, especially if viewed in water, bears the strongest resemblance to a Plicatula, or | some of the plicated Oysters. The organ of adhesion resembles that of Anomia, but is inserted between the lamine | of the internal surface of the lower valve, above the muscular impression, and below the hinge, and passes out into | an external, irregular, somewhat longitudinal superficial fissure, or cicatrix, narrowest at the hinge margin, and | which it entirely fills to a level with the surrounding surface of the shell. Three species are known, natives of the tropical seas. ] ’ The Placuna, Brug., is affined to the Anomiz, and, like them, have thin, unequal, and often irregular yalves, but neither are perforated. On one of these valves, near the hinge, we perceive two prominent ribs, forming a triangle whose apex is towards the hinge. The animal remains unknown. Sronpy tus, Linn. These have a rough and foliated shell, like the Oysters, ‘and frequently spiny, but their hinge is more complicated, for, besides the fossa for the ligament, there are two teeth in each valve that enter into fossze in the opposite valve respectiveiy: the two middle teeth belong to the most convex valve, which is usually the left, and has, behind the hinge, a projecting flattish beak, as if it had been sawed. Like the Pectines, the margins of the cloak of the animal are garnished with two rows of tentacula, and in the outer row there are several terminated with coloured tubercles: in front of the abdomen is a vestige of a foot, under the guise of a broad radiated disk with a short pedicle, and capable of contraction and elongation. From its centre there hangs a thread terminated with an oval mass, the use of which is unknown. The Spondyli are eaten like Oysters. Their shells are very often vividly coloured. They ACEPHALA TESTACEA. So adhere to all sorts of bodies, [and their form is generally modified by the surface of the objects on which they grow]. M. de Lamarck separates from the Spondylus his Plicatula, from having no external area, or disk, between the beaks; and flat, almost equal, irregular, plaited and scaly valves, as in many Oysters. [Sp. plicatus, Gmel., is the type.] Matievus, Lam.— Has a simple fossa for the ligament, as in Ostrea, with which genus Linnzus left this one, and the more so as the shell is also inequivalve and irregular, but it is distinguished by an emargination on the side of the ligament for the passage of a byssus. The best known species (Ostrea malleus, Linn.), a rare and dear shell, has the two sides of the hinge extended so as to form something like the head of a hammer, while the valves, elongated in a transverse direction, represent the handle. It inhabits the Archipelago of India. Other species, which are, perhaps, but the young of the Malleus, have no hammer-head, and these we must be careful not to confound with the Vulselle. VuLsELLA, Lam.— Has in the hinge, on each side, a little lamina projecting inwards, and it is from one of these lamine that the ligament, similar in other respects to that of the Oyster, is stretched to the other. On the side of the lamina is a sinus for the egress of the byssus. The shell is elongated in a direction perpen- dicular to the hinge. The species best known inhabits the Indian Ocean. Perna, Brug.— Has across the hinge several parallel fossee opposed to each other in the two valves, and lodging as many elastic ligaments: their shell is irregular and foliated, like the Oysters, and has on the anterior side, underneath the hinge, an emargination, through which the byssus passes. Linnzus left them also among his Ostrez. [The recent species are brought from the Indian Ocean, and from New Holland, ] There has been recently separated from Perna, the Crenatule, Lam., which, instead of transverse fosse ona broad hinge, have little oval ones quite on the margin, where they occupy little breadth. It does not appear that there is any byssus. We find them often buried in sponges. To the Perne, it is supposed, we must approximate some fossils which have more or less numerous fosse in the hinge answering to one another, and appearing also to have given attatchment to ligaments. Thus the Gervillig, Defr., have a shell almost similar to Vulsella, but with a hinge in some degree double; the exterior with opposed fossz receiving as many ligaments, and the interior garnished with very oblique teeth on each valve. We find the casts of them with Ammonites in compact limestone. [Many species have occurred at various geological periods from the lias upward, to the baculite limestone of Nor- mandy.] The Jnoceramus, Sower., is remarkable for the elevation and inequality of the valves, of which the summit is hooked near the hinge, and whose texture is lamellated. The Catilles, Brongn., have, independently of fosse, for the ligament, a conical furrow drawn in a varix, which is bent at a right angle to form one of the margins of the shell. The valves are nearly equal, and of a fibrous texture. They appear to have had a byssus. The Pul- vinites, Defr., have a triangular regular shell, and its fosse, few in number, diverge within from the summit. Their casts are found in chalk. The second subdivision of the Ostracea, as well as almost all the bivalves which follow, besides the single transverse [or adductor] muscle of the preceding genera, have another muscle going from one valve to the other, and placed in front of the mouth. It is apparently in this subdivision that we must place [THe Mutter, De Fer.,— One of the most singular and rare of known genera. It is remarkable as being intermediate in its structure between /itheria and Ostrea, and as apparently connecting the regular freshwater bivalves with the irregular marine bivalves (Ostrex), and with the genus /Mtheria, inasmuch as in the sinus at the posterior extremity of the ligament it resembles the Naiades and the Aitheriz ; and in its single muscular impression, as well as its general form, it approaches to Ostrea. ] Ernert2£, Lam.— Are large mequivalved shells, as, or even more, irregular than the Oysters, without teeth to the hinge, and where the ligament, in part external, exists also interiorly. They differ from the Ostrez in having two muscular impressions. It is not ascertained that their animal produces a byssus. They have lately been discovered in the Upper Nile. Avicua, Brug.— Has a shell with equal valves, and a rectilinear hinge, often extended into wings on each side, furnished with a narrow, elongated ligament, and sometimes with small denticulations on that side which is next 374 MOLLUSCA. the mouth of the animal. The anterior side, a little under the angle of the side of the mouth, has a notch for the byssus. The anterior adductor muscle is as yet excessively little. When the ears are less prominent, the species have been named Pintadines, Lam. (Margarita, Leach). The most celebrated is the Pearl-mussel (Mytilus mar- garitiferus, Linn.) Its nacred interior is employed in all sorts of fancy-work, and the orient-pearls, fished for by divers, chiefly at Ceylon, at Cape Comorin, and in the Per- sian Gulf, are but excretions of it. The name of Avicula is given to such species as have the ears more pointed, and the shell more oblique. There is in the hinge in front of the ligament, a vestige of a tooth, whose first trace is indeed to be detected in the Pentadines. The Mytilus hirundo, Linn., is an example from the Mediterranean, remarkable for its lengthened auricles: its byssus is large and strong, and has Fig 187.—Avicula macroptera. some resemblance to a little shrub. Tue Pinn#, Linn.— Have two equal wedge-shaped valves, which are closely united by a ligament along one of their sides. The animal (Chimera, Poli) is elongated in the same direction as the shell, as well as its lips, its branchiz, and all the other organs. Its cloak is closed on the side of the ligament; its foot is of the shape of a conical little tongue, and marked with a groove; there is a small transverse muscle in the acute angle of the valves, near which the mouth is situated, and a very large muscle at their widest part. On the side of the anus, which is behind this large muscle, there is attached a conical appen- dage, peculiar to this genus, and capable of inflation and elongation, but of the use of which we are ignorant. The byssus of several species is as fine and brilliant as silk, and is used in weaving precious stuffs. The chief is the Pinna nobilis. Tue Arcacre& (4rca, Linn.)— Have the valves equal and transverse, that is to say, the hinge occupies the longest side. It is fur- nished with a great number of small teeth, interlocking with each other; and with two nearly equal adductor muscles inserted towards the two extremities of the valves. The Arce, properly so called (Arca, Lam.), have a straight hinge, and the shell is elongated in a direction parallel to the hinge. The apices of the valves are generally protube- rant, and curved towards the hinge, but widely apart. The valves do not meet in the middle, because the animal (Daphne, Poli) has in front of the abdomen a process of a horny substance, or a tendinous ribbon, in lieu of a foot, which passes out thence, and by which the animal is affixed to submarine bodies. These shells reside near the shore in rocky places. They are usually covered with a velvety epidermis. They are in little request for the table. There are some species in the Medi- terranean ; and a great number of fossil species, particularly in Italy, in depositions anterior to the chalk. M.de Lamarck separates, under the name of Cucullea, some Arce in which the teeth at the ends of the hinge assume a longitudinal direction. [In Cucullea the two valves are Fig. 188.—Arca barbata. not exactly alike, and there does not appear to be a byssus, whence Sowerby doubts the propriety of arranging this genus with the Arcacexz.] We ought probably to separate also such species as have well-marked ribs, and whose valves meet closely and completely, for there is thus reason to believe that the animal is not fixed, and may rather resemble that of the Pectunculus. There is assuredly still greater reason to sepa- rate the Arca tortuosa, Chem., because of its peculiar figure, and its unequally oblique valves. (It is the type of the genus Trisis of Oken.) PrectuncuLus, Lam.— Has the hinge in a curved line, and the shell of a lenti- cular form. The valves close exactly, and their apices are near each other. The animal (4vinea, Poli) has a large compressed foot, with a double lower margin, and is hence Fig. 139.—Pectuncuius capable of creeping. It lives in sand. We have some native species. ACEPHALA TESTACEA. 375 Nucuta, Lam.— Has the teeth of the hinge in a broken line. The form of the shell is elongated and narrowed towards the posterior end. We do not know the animal, but it is probably not much unlike that of the pre- ceding genus. For a long time we have placed here the Z'riyonie, Brug., so remarkable for their hinge, which is furnished with two plates en chevron, crenulated on both surfaces, and each penetrating into two cavities, or rather between four plates of the opposite side, similarly crenulated on their internal sur- faces. From the marks on the inside of the valyes we inferred that the animal had not tubes, of any length at least; and MM. Quoi and Gaymard having discovered it alive, we find, in fact, that, like the Arcaceex, it has an open cloak without any separate orifices, not even one for the anus. Its foot is large, truncate, and hooked at its anterior part. The recent Trigonie resemble the Cockles in the figure of their shell, and in the manner in which it is ribbed. Their interior is nacred. The fossil Trigoniz are considerably different. Their shell is flattened on one side, oblique, longest in the direc- tion perpendicular to the hinge, and crossed in the contrary direction by series of tubercles. THE SECOND FAMILY OF THE ACEPHALA TESTACEA,— THe MytTILracEx,— Ilas the cloak open in front, but with a separate aperture for the passage of excrements. All of them have a foot with which they crawl, or at least draw out, direct, and fix the byssus. They are known to the vulgar by the name of Mussels. MussELs, properly so called (Mytilus, Linn.),— Have a closed, triangular shell, with equal ventricose valves. One of the sides of the acute angle forms the hinge, and is furnished with a long, narrow ligament. The head of the animal is in the acute angle ; the other side of the shell, which is the longest, is the anterior one, and allows the passage of the byssus; it terminates in a rounded angle, and the third side ascends towards the hinge, to which it is joined by an obtuse angle; near this is the anus, opposite which the cloak forms a peculier aper- ture or little tube. The animal (Callitriche, Poli) has the edge of its cloak provided with branched tentacula near the rounded angle, as it is there that the water required for respiration enters. In front, near the acute angle, there is a small transverse muscle, and a large one behind near the obtuse angle. The foot resembles a tongue. In Mytilus, Lam., the summits [of the valves] are nearly terminal. Some species are smooth, others striated. The common Mussel (M. edulis, Linn.) is spread in extraordinary abundance along all our coast, where it is often suspended, in long clusters, to rocks, piles, ships, &c. It forms an article of food of some importance, but it is dangerous when eaten to excess ; [and under certain unknown circumstances, or to some individuals, becomes deleterious]. Some species have been found in a fossil state, (which Brongniart distinguishes generically by the name Mitiloide). In Modiolus, Lam., the apices are lower, and towards the third of the hinge; they are also more protuberant and rounded, whence the shell has more of the ordinary shape of bivalves. We may also distinguish separately the Lithodomus, Cuy., which has an oblong shell, almost equally rounded at both ends, and the summits very near the anterior. They at first suspend themselves to stones, like the common Mussels, but then they perforate them, and bury themselves in the excavations, whence they cannot again issue. After they have made their cells, the byssus ceases to grow.* One species (Mytilus lithophagus, Linn.) is very common in the Mediterranean, where it furnishes a food agreeable enough on account of its peppery taste. There is another (Modiola caudigera) which has the posterior end of each valve armed with a very hard little appendage, that is, perhaps, of service in the exca vation of its dwelling.y Tue FresH-waTer MusseE ts (dnodonfes, Brug.)— Have the anterior angle rounded like the posterior ; and the angle near the anus obtuse, and almost rectilinear: their thin and moderately ventricose shell has no tooth in the hinge, but merely a liga- ment occupying its entire length. The animal (Limnea, Poli) is without a byssus ; and it creeps over + The means by which the saxicavous bivalved Mollusea perforate * “We cannot imagine,” says Sowerby, “that this remark has rocks has given rise to much discussion: some believe that they do been made from actual observation, because we believe it te be con- trary to the nature of the unimal to be at one time attached by a byssus, and not at another; and, moreover, we have ourselves ‘seen Lithodomi not more than one-eighth of an inch in length, in as com- pletely-formed proportions as the fuller-grown specimens.”’—Ep. the work by the mechanical action of the valves; others attribute it to asolvent secreted by the animal. All things considered, I think the first of these opinions, notwithstanding the difficulties in the way of its adoption, is vet the most probable. 376 MOLLUSCA. the sand or mud by means of a large, com- pressed, and nearly quadrangular foot. The posterior end of the cloak is garnished with many small tentacula. The Anodontes live in fresh waters. We have some native species; and of the largest (Mytilus cygneus, Linn.) the valves are used to skim milk. From its insipidity, the animal is not edible. M. de Lamarck distinguishes, under the name of Iridina, an oblong species, whose hinge is granu- lated its entire length. The cloak of the animal is closed a little behind.* The Dipsas of Leach is founded on another species, which has the angles more decidedly marked, and a vestige of a tooth in the hinge. Tue Unrones (Unio, Brug.)— Resemble the Anodontes in the shell and in the animal, but the hinge is more complicated. There is a short cavity in the anterior part of the right valve, which receives a short plate or tooth from the left one, and behind it is a long plate, which is inserted between two others on the opposite side. They also inhabit fresh water, preferring running streams. Sometimes the anterior tooth is more or less large and unequal, as in the Mya margaritifera, Linn., whose pearls have been used in making ornaments. At other times this tooth is laminated, as in Mya pictorum, Linn., known to every body [from its shells being used in holding water colours]. (A great number of species, remarkable for their size and figure, are found in the lakes and rivers of North America. MM. Say and Barnes [and Lea] have described them, and have proposed some subgenera amongst them.) M. Delamarck distinguishes the Hyria, with the angular productions of the hinge so decided that their shell is almost triangular. And the Castalia, the shell of which, somewhat heart-shaped, is striated with rays; and the teeth and plates of the hinge are grooved across their longest diameter, which gives them a relationship with the Trigonie. There ought to be placed near the Uniones some marine shells, which have a similar animal, and very nearly the same sort of hinge, but the summits of the valves are more swollen, and prominent ribs radiate from them to the margins. These are the Cardita, Brug. Their shape is more or less oblong or cordate. In some the shell gapes on the lower side. The Cypricardia, Lam., are Cardite with the tooth under the summit divided into two or three. Their form is oblong, and their sides unequal. M. de Blainville has again separated the Coral- liophaga, whose shell is thin, and the lateral lamina [of the hinge] so much obliterated that it might induce us to approximate them to the Fig. 191.—Cardita caliculata. Venus. One species is known, that burrows in masses of coral. The Venericardia, Lam., differ from the Cardita only because the posterior lamina of their hinge is more trans- verse and shorter, thus making an advance to the Venus: their form is almost round. It may be inferred from the muscular impressions that their animal has also a resemblance to that of the Cardita and of the Unio. Both of them approach the Cardia in general form and in the direction of their ribs. I suspect that this is also the place for the Crassatella, Lam. (Paphia, Roiss.), which has sometimes been approximated to Mactra, and at others to Venus. The hinge has two slightly-marked lateral teeth, and two very strong middle ones, behind which, extending to both sides, is a triangular cavity for an internal ligament. The valves become very thick with age, and the impression made by the margins of the cloak, leads to the belief that there are no extensile tubes. Fig. 190.—Anodon Gipsas. THE THIRD FAMILY OF THE ACEPHALA TESTACEA,— Tue CamAcEA,— Ilas the cloak closed, but perforated with three holes, through one of which the foot passes; the second furnishes an entrance and exit to the water required for respiration ; and the third is the vent: the two latter are not prolonged into tubes, as in the following family. * Notwithstanding the similarity of the shell, Iridina does not belong to this family, but to the Cardiacea.—Ep. Se eee ee ee ee ee eee ees ne eee ACEPHALA TESTACEA. 377 The family comprises only the genus Cuama, Linn.,— Where the hinge is very analogous to that of a Unio,—that is to say, the left valve near the summit is provided with a tooth, and further back with a salient plate, which are received into corresponding fossee of the right valve. This genus has justly been subdivided. The Tridacne, Brug., have a shell greatly elongated transversely, and equivalve; the superior angle, which answers to the head and summit, very obtuse. The animal is very remarkable, for it is not placed in the shell like most others, but its organs are all directed, or as it were pressed out, forwards. There is a wide opening in the anterior side of the cloak for the passage of the byssus: a little beneath the anterior angle there is another aperture by which the water gets access to the branchiz; and in the middle of the inferior side there is a third smaller opening, corresponding with the anus, so that there is no need of a passage in the posterior angle, which is solely occupied by a cavity of the cloak, open only to the third aper- ture, which has been just mentioned. There is but a single transverse muscle, corresponding to the middie of the margin of the valves. In the Tridacna of Lamarck the shell has in front, like the cloak, a large aperture with denticulated margins for the [exit of the] byssus, which is distinctly tendinous, and continuous with the muscular fibres. Such is the Chama gigas, Linn., of the Indian Ocean, famous for its enormous size. There are individuals which weigh more than three hundred pounds. The tendinous byssus by which it is suspended to rocks is so large and tough as to require to be cut with an axe. The animal is edible, although very hard. [It is placed in the shell somewhat differently from other Lamellebranchiate Mollusca; for, from a peculiar inversion, it is found that its different parts have not their ordinary correspondency,—a circumstance which Blainville thinks is owing to the suspended condition of the shell.] Hippopus, Lam.—The shell is closed and flattened in front, as if it had been truncated. [H. maculatus, from the South Seas, is the only species. ] Chama, Brug.—Shell irregular, inequivalved, often lamellated and spinous, and attached to rocks, corals, &c., in the manner of Oysters. The summits are often very protuberant, unequal, and curled. Often also their interior cavity has this form, though nothing on the exterior surface may indicate it. The animal (Psilopus, Poli) has a small foot, bent almost like that of aman. The tubes, if there are any, are short and separate, and the aperture through which the foot passes is little, larger than them. There are some living species in the Mediterranean ; and there are also several fossil species. [The Cleidotherus, Stutchbury, has a very exact resemblance to Chama, but is worthy generic distinction from the remarkable circumstance of its internal hinge cartilage having an elongated testaceous appendage, in form resembling the human clavicle. The only species is from Port Jackson. ] The Dicerates, Lam., do not appear to differ from Chama in anything essential; but their hinge tooth is very thick, and the spirals of their valves are so prominent as to prompt a comparison of their form with two horns. {Only known in a fossil state. ] Isocardia, Lam., has a free, regular, ventricose shell, the beaks of the valves distant, turned backwards, and involute. The animal (Glossus, Poli) differs from that of Chama only in having a larger and oval foot, and in the anterior aperture of the cloak beginning to assume the ordinary proportion. One species (Chama cor, Linn.) is found in the Mediterranean [and German Ocean]. THE FOURTH FAMILY OF THE ACEPHALA TESTACEA,— Tue CarRDIACEA,— Have the cloak open in front; and there are besides two separate apertures, (one for respiration and one for a vent,) which are prolonged in tubes, sometimes distinct, and at others united together. There is always an adductor muscle at each extremity, and a foot, which in general enables the animal to creep. We may regard it as a very general rule, that those which have long tubes live buried in the mud or sand. ‘This peculiarity of their organization is to be traced on the shell by the greater or less depth of marks made by the insertion of the edges of the cloak previous to its uniting with the impres- sion of the posterior transverse muscle. Tue Cockers (Cardium, Linn.)— Have, like most other Bivalves, a shell with equal ventricose valves, with prominent beaks curved towards the hinge, which gives them, when we view them laterally, the figure of a heart, whence their generic name. Ribs, more or less prominent, trend from the beaks to the margins of the valves. But that which distinguishes the Cardia is their hinge, where we may notice, on both sides in the middle, two little teeth ; and at some distance before and behind, a tooth or prominent lamina. The animal (Cerastes, Poli) has usually an ample aperture in the cloak, a very large foot, bent in the middle, with its point directed forwards, and two short or but moderately long tubes. 378 MOLLUSCA. The species of Cardia are numerous on our coasts, and the C. edule, Linn., is gathered for food. [Fossil species occur in nearly all the fossiliferous beds, from the mountain limestone upwards. ] We may separate from them, under the name of Hemicardia, the species with valves compressed from before backwards, and strongly keeled in the middle, for it is difficult to believe that the animal is not modified to suit this singular configuration. : : THE Donacrs (Donax, Linn.)— Have nearly the same kind of hinge as the Cardia, but their shell is of a very different form, being a triangle, of which the obtuse angle is at the summit of the valves, and the base at their edge, and of which the shortest side is that of the ligament, or the posterior side, a rare circumstance among Bivalves. They are generally small shells, prettily striated from the beaks to the margins. Their animal (Peronea, Poli) is furnished with long tubes, that are received into a sinus of the mantle. We have some native examples. (The Donaz irregularis, a fossil from the neighbourhood of Dax, is the type of the genus Gratelupia of Desmoulins, and is distinguished from the other Donaces by several tooth-like lamellz which accompany the hinge teeth.) Tue Cyctapes, Brug.,— Like the Cardia and Donaces, have two teeth in the ‘middle of the hinge, and before and behind two prominent and sometimes crenulated laminz ; but the shell, as in several species of Venus, is more or less rounded, equilateral, and transversely striated. The external tint is usually grey or greenish. The animal has moderate tubes, and is an inhabitant of fresh waters. One species (Tedlina cornea, Linn.) is very common in our marshes. Cyrena, Lam.—The shell is thick, somewhat triangular and oblique, and covered with an epidermis, and is further distinguished from the Cyclas by having three hinge teeth. They likewise inhabit rivers, but we have none in France. Cyprina, Lam.—Shell thick, oval, with curved beaks, three strong teeth, and besides, a lateral tooth behind: under the teeth a large fossa, in which is lodged a part of the ligament. Palathea, Brug., [Pota- mophila, Sowerby,] has the sheli a right-angled triangle; three teeth in one valve and two in the other, diverging from the beaks; and the lateral teeth approximated. The single species known [Venus subviridis, Gmel.] is from the fresh waters of India. [It is also found in the river Congo.] This is the proper place to set another genus dismembered from the Venus, viz., the Corbis, Cuv. (Fimbria, Megerl.) Marine transversely oblong shells, which have also strong middle teeth and well marked lateral plates : their external surface is furnished with transverse ribs, so regularly crossed by rays that it may be compared to wicker-work. [Venus fimbriata, Linn., is the type.] Since the impression of the cloak has no fold, the tubes ought tobe short. There are some fossil species. ; Tae TELLINID (Tellina, Lin.)— Have in the centre [of the hinge] a tooth on the left and two teeth on the right, often bifid, and at some distance in front and behind; on the right valve, a lateral tooth or plate, which does not pene- trate into a cavity of the opposite one. There is a slight fold near the posterior extremity of both valves, which renders them unequal in that part, where they gape a little.* The animal (Peronea, Poli), like that of Donax, has two long tubes, respiratory and excrementitial, which can be withdrawn into the shell, and concealed in a duplicature of the cloak. The shells are generally transversely striated, and painted with beautiful colours. Some are oval and thickish; others oblong and much compressed ; others lenticular. Instead of a fold, we often find in the latter merely a deviation in the course of the transverse strie. We could separate generically some oblong species, which have no lateral teeth; and others that, with the hinge of a Tellina, have no posterior fold, form the genus Tellinides, Lam. It is necessary to distinguish from Tellina the Lovipes, Poli, which have a lenticular shell with the central teeth almest obsolete, and behind the nates a simple groove for the ligament. The animal has a short double tube, and its foot is prolonged into a cylindrical cord. We notice within the valves, besides the ordinary impressions, a mark going obliquely from the impression of the anterior muscle (which is very long) towards the nates. The impression of the cloak exhibits no sinus for the retractor muscle of the tube. Lucina, Brug., has, like Cardium, Cyclas, &c., separate lateral teeth penetrating between corresponding lamine of the other valve; and in the centre are two teeth, which are often scarcely visible. The shell is orbicular, without an impress of the retractor muscle of the tube, but that of the anterior retractor muscle is very long. Having thus the same marks as Loripes, their animals ought to be analogous. [It is obvious that Loripes and Lucina are but one and the same genus.] The recent species, so far as is known, are munch less numerous than the fossil: the latter are very common in the vicinity of Paris. We ought to place near the Lucina the Ongulina, which has an orbicular shell, two hinge teeth, but no lateral anes, and the anterior muscular impression is not so long. = * [“ The irregular flexuosity of the anterior ventral margin appears | species possessing this character, and agreeing alsu in other general to have been constantly regarded as the principal distinguishing eha- | circumstances, it may perhaps be still considered as the essentiai racter of this beautiful genus; and when we consider the number of | character of the genus.”—Sowerly.] oo ~T © ACEPHALA TESTACEA. Tue Venusip& (Venus, Linn.)— Comprise many shells, whose common character is to have the teeth and laminz of the hinge collected under the beaks in a single group. They are in general flatter and more elongated in a direction parallel with the hinge than the Cardia. Their ribs, when there are any, are almost always transverse, which is the contrary of the rule in the Cardia. The ligament often leaves, behind the beaks, an elliptical impression, to which the term vulva las been applied; and in front of the beaks there is almost always another oval impression that has been called the anus.* The animal has always two tubes, capable of being more or less protruded beyond the shell, but they are sometimes united together apparently in one; and it has also a compressed foot wherewith to crawl. M. de Lamarck restricts the name Venus to those which have three divergent teeth under the beaks. This cha- racter is peculiarly distinct in the species with an oblong, slightly convex shell. [These have been separated by Sowerby to form his genus Pudlastra, to which he unites the Venerupis, Lam., believing that the latter do never perforate rocks, but merely occupy the holes excavated by other animals.] Some (Astarte, Sow., or Crassina, Lam.) have only two diverging hinge teeth, and resemble the Crassatella in their thickness and some other characters. Among the heart-shaped species it is important to notice those whose transverse ribs or striz termi- nate in crests or tuberosities on the posterior side; and those which have longitudinal ribs and elevated crests. They lead by degrees to the Cytherea, Lam., which has a fourth tooth upon the rizht valve, projecting under the anus, and received in a corresponding fossa of the left valve. There are some species, as in Venus, of an elliptical and elongated form, and others that are ventricose, among which is the famous species (Venus Dione, Linn.), that originated the application of the name of the Goddess of Love to a shell, and remarkable for the long pointed spines that guard its posterior end. There are species too of an orbicular form with slightly curved beaks, in which the impression of the retractor muscle of the tubes forms a large, almost rectilinear triangle. When the animals are better known, it is probable we may have to separate from Cytherea,—1. The species of a much compressed, lenticular shape, with beaks approximating to a point. There being no impression of the fold of the cloak, we infer that the tubes are not extensile. 2. Those of a ventricose, orbicular form, which want the impression just mentioned, but have a very long imprint of the anterior muscle, as in Lucina. 3. The thick species with radiated ribs and without the impression of the cloak, which connect the Venuside with the Venericardia. There has been already separated from Venus the Capsa, Brug., which have on one side of the hinge two teeth, and on the other one only, but bifid; the shell has no anus, is considerably convex, oblong, and the impression left by the retractor muscle of the foot is considerable ; and the Petricola, Lam., with two or three very distinct teeth, one of them forked, on each side of the hinge. Their form is more or less cordate; but, as they live in cavities of stone, [which they themselves perforate,] they become sometimes irregular. From the marks left on the shell by the cloak, their tubes ought to be larger. The Corbule, Brug., similar in form to the triangular or heart-shaped Cytherez, have only a single strong tooth in each valve, locking side by side. The ligament isinternal. The tubes ought to be short; and the valves are rarely quite equal. The fossil species are much more numerous than those actually existing. Some live in the interior of stones. [The Sphenia, Turton, separated from Corbula, and which has C. rostrata as its type, has not been adopted by foreign Conchologists. Sowerby unites it to Mya.] Tue Macrraip® (Mactra, Linn.)\— Are distinguished among the shells of this family because the ligament is internal, and is lodged on both sides in a triangular fossa. They have all a compressed foot, fit to creep with. In Mactra, Lam., the ligament is attended in the left valve, on both sides, with a lateral tooth, which locks within two lamin of the opposite valve. Close to the ligament there is on both valves a tooth which is folded into the shape of the letter V, the point being nearest the umbo. The tubes are short and united. We have some species on our shores.f In the Lavignons [Listera, Turton] the lateral teeth are almost obliterated: nothing is noticeable but a smal] tooth near the internal ligament, and we may remark also a small exterior ligament: the posterior side of the shell is the shortest. The valves gape a little. The tubes are separate and very long, as in Tellina. One species (Mya hispanica, Chemn.) is native, living in the sand at the depth of several inches. THE FIFTH FAMILY OF THE ACEPHALA TESTACEA— THe INcLusa,— Hfas the cloak open at the anterior end, or near the middle only, for the passage of the foot. The opposite end is prolonged into a double tube, that can be pushed far beyond the shell. This is always * These terms are apt to mislead, and are otherwise objectionable. | species. The same author has also given a good definition of Amphi- The student should remember that the ligament is always bn the pos- | desma, which is not synonymous with the Ligula; but our limits terior side of the beaks. prevent us going into detail. Cumingia, Sowerby, should be placed + Erucina, Lam., is allied to Mactra, but indifferently character- | near to Amphidesma. It is remarkable for the dissimilarity of the ized. One portion of them may be Crassatellea. dmphidesma, Lum., | hinge of the two valves, oue having a strong lateral tooth on each side or Ligula of Montagu, appear also to be atlined to Mactra; but they | of the ligament, and the other being entirely destitute of lateral teeth. are too little known to assign to them a definite place. [Hrycina has | The species are found in sand, in the fissures of rocks, and, so far as is been since well defined by Sowerby, who has characterized three | known, they are trepical.] 380 MOLLUSCA. agape at both extremities. They live almost umformly ouried in sand or mud, in rocks or in wood. Tur Myapz (Mya, Linn.)— Are bivalved shells with a variable hinge. The double tube forms a fleshy cylinder; the foot is com- pressed. From variations in the hinge MM. Daudin, Lamarck, &c., have established the following subdivisions, the first three having an internal ligament. Lutraria, Lam.—the ligament, like that of the Mactra, is inserted in a large triangular fossa in each valve, and in front of that fossa is a small tooth en chevron, but there are no lateral teeth. The gape of the valves is wide, particularly at the posterior end, whence the large double tube for respiration and excremential matters protrudes. The foot, which issues at the opposite end, is small and compressed. The species burrow in sand at the mouth of rivers. Mya, Lam., has in one valve a broad, spoon-shaped tooth, which projects into the other valve, in which there is a fossa, and the ligament is stretched from the fossa to the tooth. The species on our shores burrow in sand. Near to the My we ought to place the Anatine, Lam., that have a small moveable testaceous appendage, connected with the ligament immediately before the hinder teeth. In the Solemya, Lam., the ligament appears externally, but aportion of it remains attached to a spoon-shaped tooth in each valve. There is no other toothin the hinge. A thick epidermis overlaps the margins of theshell. An example (Tellina togata, Poli) lives in the Mediterranean, [The animal is so remarkable that it may become the type of a distinct family, for, instead of four lamellar branchiz, it has two only, which are pectinate, or rather pen- nate.| Glycymeris, Lam. (Crytodairia, Daud.), has neither teeth, nor lamin, nor fosse, in the hinge, but a simple callosity, behind which there is an external ligament. The animal is similar to Mya. The best known species (Mya siliqua, Linn.), comes from the Arctic seas. Panopea, Mesnard, Lagr., have in front of the callosity of the Fig. 192.—Anatina suorostrata preceding, a strong tooth immediately under the beak, which crosses with a similar tooth of the opposite valve,—a character which affines them to Solen. There is a large species from the hills at the foot of the Apennines, so well preserved that it has been sometimes believed to have been brought from thesea. Per- haps we ought to remove from the genus another fossil species, which is almost completely closed at the anterior end. We may arrange at the end of these different modifications of the Myadex, the Pandora, Brug., which has one valve much flatter than the other, an internal ligament placed crosswise, accompanied with a projecting tooth of the flat valve. The posterior side of the shell is elongated. The animal is more completely contained within the shell than it isin the preceding genera, and the valves close better, but its habits are thesame. One native species (Tellina inequivalvis, Chemn.), is well known. Here, also, we group together some small but singular genera. The Byssomia, Cuv., characterized by an obiong toothless shell, with the opening for the foot very nearly in the centre of the valves, and opposite the beaks. They perforate rocks and corals. One species, furnished with a byssus (MJ/ytilus pholadis, Mull.), is very numerous in the seasofthenorth. Hiatella, Daud., has ashell that gapes in the middle where the foot protrudes, as in the pre- ceding, but the tooth of the hinge is more distinct. The shell is often armed backwards with [two] rows of spines. The species live in sand and amid zoophytes, &c. The northern seas possess a small species.* Tae Soxtenes (Solen, Linn.) — Have an oblong or elongated bivalved shell, but their hinge is always furnished with distinct teeth, and their ligament is always external. Solen, Cuv., or Razor-fish, has a shell in the form of an elongated cylinder, with two or three teeth in each valve towards the anterior extremity, where the foot passes out. This is of a conical shape, and is used by the animal to form its burrow in the sand, in which it sinks rapidly on the approach of danger. Several species inhabit our shores. The species in which the teeth approach near the centre of the shell may be distinguished generically. The shell in some of them is still long and straight; in others it is wider and shorter, and the foot of these is very large. Some such are found in the Mediterranean. Inthe Sanguinolaria, Lam., the hinge is very nearly the same as in the broad Solenes, and there are two hinge teeth at the middle of each valve; but the valves approximate much closer at their ends, where they only gape to a slight extent, as in some of the Mactre: S. vosea is the type. Psammobia, Lam., differs from Sanguinolaria in having a single tooth in one valve, which clasps in between two of the opposite ones. And the Psammothea, Lam., have only one tooth in each valve, but otherwise resemble Psammobia. [The Glauconome, Gray, is a geuus of the family Solenacee, “ inhabiting some of the great rivers of the continent of China.”” The shell is thin, oblong, with close margins, and three teeth in each valve. Solenelia, Sowerby, is an interesting genus, partaking of the characters of Nucula and Solen, so that it may be regarded as the link that connects the two families Sclenacee and Mactracee, “It belongs to the Solenacez, having the external ligament and the large sinus in the muscular impression of the mantle; but resembles Nucula in having the lateral teeth divided into a series of minute and pointed teeth, differing from it, however, in not having an internal ligament.’’ The species are South American.] Tue Puorapes (Pholas, Linn.),— Have two principal valves, wide and ventricose on the side of the mouth, narrowed and elongated on the opposite side, and leaving at each end a large oblique opening; the hinge has, like that of the Mya, * (Byssomia, Hiatella, Biopholius, and Pholeobius of Leach, are all reduced to the Saxicava of Lam., by Sowerby, and not unreasonably.j ACEPHALA TESTACEA. 381 properly so called, a lamina projecting from one vatve into tne other, and an internal ligament proceeding from that lamina to a corresponding fossa. The cloak is reflected outward upon the hinge, and con- tains one or sometimes two or three supernumerary pieces. The foot issues by the opening at the side of the mouth, which is the widest, and from the opposite end there comes out the two tubes united in one, and capable of being extended in every direction. The Pholades inhabit cells which they have made, some in the mud, others in rocks, {and others in wood]. They are sought after [in some countries] from their agreeable taste. Pholas dactylus, Linn., occurs on our coasts. [The genus Xylophaga of Turton, which burrows in decayed wood, is reduced by Deshayes to Pholas. ] Tue Terepines (Teredo, Linn.)— Have the mantle extended in a tube much longer than the two small rhomboidal valves, and terminated by two short tubes, the base of which is furnished on each side with a calcareous and moveable kind of operculum or palette. These Acephales, while quite young, penetrate and establish their habitations in submerged pieces of wood, such as piles, ship’s bottoms, &c., perforating and destroying them in every direction. It is thought that, in order to penetrate as fast as it increases in size, the Teredo excayates the wood by means of its valves ; but the tubes remain near the opening by which its entrance was effected, and through which, by the aid of its palette, it receives water and aliment. The gallery it inhabits is lined with a calcareous crust which exudes from its body, and which forms a second kind of tubular shell for it. It is a noxious and destructive animai in the seaports of Europe. The common species (7. navalis, Linn.), which is said to have been introduced from the torrid zone, has more than once threatened Holland with ruin, by the destruction of its dikes. It is six inches in length and upwards, and has simple palattes. In tropical countries, there are large species with jointed and ciliated palettes, which deserve notice for the analogy they establish with the Cirrhopodes. Such is the Teredo palmulatus, Lam. Tue Fistutana, Brug.— Has been distinguished from Teredo, for its external tube is entirely closed at its larger end, and is more or less like a bottle or club. The species are sometimes found buried in wood or fruits that have been apparently submerged in the water; sometimes they are simply enveloped in the sand. The animal has two small valves and two palettes, as in the Teredo. Recent specimens are brought from the Indian Ocean, but our formations have preserved some fossil species. Near Fistulana we should place Gastrochena, Spengler*, whose shells have a toothless hinge, and the margins being wide apart in front, leave a large oblique opening, opposite to which there is in the cloak a small opening for the passage of the foot. The double tube, which can be concealed entirely within the shell, is capable of great elongation. It appears certain that they have a calcareous tube. In some species, the beaks are at the anterior angle; in others, near the middle. They live in the interior of madrepores, which they perforate. [‘‘ This bivalve is inclosed in the posterior clavate extremity of a shelly tube, which is attenuated and open anteriorly, its aperture being oblong and bilobate, or nearly divided into two by a sort of septum which does not quite meet in the centre: this double aperture serves for the passage of the two tubes of the animal: the posterior extremity of the shelly tube is closed. This irregular clavate tube, already inclosing the two valves of the Gastrochena, is generally found within some other shell, to the inside of which it is attached, or it is protected in the ready-formed cavities of shells or rocks, or it lines cavities perforated by the animal itself in rocks, shells, or corals, and in this latter case, the double termination of the shelly tube projects beyond the surface of the coral or other object in which it is inclosed.’’] Among fossils, two genera have been recognized furnished with tubes like the Teredo, but the first [Teredina, Lam.] has a little, spoon-shaped cavity in each valve, and a little loose piece, in form of a shield, at the hinge. The other (Clavagella, Lam.) has one of its valves agglutinated to tiie tube, and the other loose. A living species is found in the madrepores of the Sicilian seas, which has been described by M. Audouin. [The best description of this genus is given by Messrs. Broderip and Owen in the Trans. of the Zoological Society.] Some naturalists think we should also place in this family Tue ASPERGILLUM,— The shell of which is formed of an elon- gated, conical tube, closed at its widest ex- ~ tremity by a disk perforated with numerous small tubular holes ; the little tubes of the outer range, being longest, form a kind of corolla round it. The reason for approxi- mating them to the Acephala with tubes is Fig 193 —Aspergillum. found in the fact that there is a double * According to Deshayes, Gastrocnena and Fistulana are the same,—Ep. MOLLUSCA. projection on one part of the cone, which really resembles the two valves of the Acephales. The re- semblance between its little tubes, and those which envelope the tentacula of certain Terebella, formerly caused this animal to be referred to the Annelides. The best known species (Asp. javanus) is seven or eight inches in length. [Rang conjectures that the animal of Aspergillum is essentially the same as that of Clavagella, and, as well as Blainville, he erroneously thinks that both are furnished with a byssus passing through all the anterior apertures of the tube, to attach it to foreign bodies. The Aspergillum probably burrows in sand, the disk underneath, and the tubular part uppermost.] THE SECOND ORDER OF THE ACEPHALES. THE SHELL-LESS ACEPHALES, (or A. NubA). * This is a small order, and differs so far from the other Acephales that it might be made a distinct class, were such a division considered to be convenient. Their branchiz assume various forms, but are never divided into four leaflets: the shell is replaced by a cartilaginous tunic, sometimes so thin that it is as flexible as a membrane. We divide the order into two families. THE FIRST FAMILY OF THE ACEPHALA NUDA,— THE SEGREGATA,— Embraces the genera whose individuals are isolated and without mutual organic connection, although they often live in societies. Tue Brenores, Brug. (Thalia, Brown ; Salpa and Dagysa, Gm.),— Have the cioak and its cartilaginous envelope oval or cylindrical, and open at the two extremities. On the side of the anus the aperture is transverse, wide, and furnished with a valve, which allows the water to enter, but prevents its egress; on the side of the mouth the aperture is simply tubular. Muscular bands embrace the cloak and contract the body. The animal moves by forcing out from the anterior aperture the water which has entered the body by the posterior, so that its motion is always retrograde, whence it has happened that some naturalists have mistaken the posterior aperture for the real mouth. It also generally swims with the back undermost. The branchia form a single tube or riband, furnished with regular vessels, placed obliquely in the middle of the tubular cavity of the cloak in such a manner as to be constantly bathed by the water as it traverses that cavity.f The heart, the viscera, and the liver, are piled near the mouth towards the back; but the position of the ovary is variable. The cloak and its envelope exhibit in the sun the colours of the rainbow, and are so transparent that the whole structure of the animal can be seen through them : in many they are furnished with perforated tubercles. The animal has been seen to come out from its envelope without apparently any injury. But a more curious fact in their history is that, during a certain period, they remain united together, as they were in the ovary, and float in the sea in long chains, the individuals being disposed, however, in a pattern different in different species. M. de Chamisso assures us that he has ascertained a still more singular fact, which is, that the individuals that have issued from a multiplicate ovary have not an ovary of the same kind, but produce only isolated individuals of a form considerably different from their originals ; and these again, give birth to others with ovaries similar to the parents of the first, so that there is, alternately, a scanty generation of separated individuals, and a numerous generation of aggregated indi- viduals, and these two alternating generations do not resemble each other. Certainly we have observed, in some species, small individuals adherent to the interior of larger ones by a peculiar sucker, which were different in shape tiom those which contained them. These animals are found in abundance in the Mediterranean and the warmer portions of the ocean, and are frequently phosphorescent. The Thalia, Brown, have a little crest or vertical fin near the posterior end of the back. Amongst the Salpe, properly so called, there are some which have, within the cloak, above the visceral mass, a gelatinous plate of a deep colour, which may be the rudiment of a shell. In others there is only a simple protu- berance of the cloak itself in this situation, but of a thicker texture. In others there is neither plate nor pro- € The Acephalophora hetcrobranchiata of Blainville. The Tuniccta | + Some authors say that this tube is perforated at bothends, and that of Lamarck. the water traverses it, 2 fact I have in vain sought to determine. ae ee ee ee ee ee es te ACEPHALA NUDA. 383 tuberance, but the cloak is prolonged into certain points. And of tnese some have a single point at each extremity, others have two, three, or even more at the oral extremity ; some have one only at that end ; and the greater number are simply oval or cylindrical. Tue Ascip1x (Aseidia, Linn.), Thetyon of the Ancients. The cloak and its cartilaginous envelope, which is frequently very thick, resemble sacs everywhere closed, except at two orifices, which correspond to the tubes of many Bivalves, one of which admits the water of respiration, and the other is the vent. Their branchiz form a large sac, at the bottom of which the mouth is situated, and near the mouth is the mass of viscera. The envelope is much wider than the cloak properly so called. This is fibrous and vascular; and we perceive on it one of the ganglions between the two tubes. These animals attach themselves to rocks and other bodies, and are deprived of all power of locomotion; the chief sign of vitality which they exhibit consists in the ab- sorption and evacuation of water through one of their orifices: when alarmed, they eject it to a con- siderable distance. They abound in every sea, and some of them are eaten. Some species are remarkable for the long pedicle which supports them. M. Savigny, from his own researches and mine, has attempted to subdivide the Ascidiz into several subgenera: such are Cynthia,—body sessile, envelope coriaceous, branchial sac plaited longitudinally. Phadlusia differs from the preceding in the branchial sac not being plaited ; their envelope is gelatinous. Clavellina,—the branchial sac without plaits, not reaching the bottom of the envelope, the body pedunculate, the envelope gelatinous. Boltenia,—the body pedunculate, and the envelope coria- ceous. He also takes into consideration the number and form of the tentacula which encircle the inside of the branchial orifice, but their characters, in part anatomical, cannot yet be applied with certainty to a great number of species. Mr. Macleay has more recently proposed two genera, the Cystingia and Dendrodoa, on distinctions of the same nature. THE SECOND FAMILY OF THE ACEPHALA NUDA,— THE AGGREGATA,— Comprises animals more or less analogous to the Ascidia, but united in a common mass, so that they seem to communicate organically with each other, and in this respect to connect the Mollusca with the Zocphytes ; but what, independently of their peculiar organization, is opposed to this idea, is that, according to the observations of MM. Audouin and Milne Edwards, the individuals at their birth live and swim about separately, and only become united at a certain subsequent period of their life. Their branchie form, as in the Ascidia, a large sac, which the food must traverse before it can reach the mouth : their principal ganglion is likewise between the mouth and the anus, and the disposition of the viscera and of the ovary is very nearly similar.* Nevertheless some have, like the Biphor, an opening at each end. Such are THE Borrytuus, Gertn.,— That has an oval form, adherent to various foreign bodies, and united by tens or twelves, like the rays of astar. The branchial orifices are at the outer end of the rays, and the vents open in a common cavity, which is in the centre of a star. When an orifice is irritated one animal contracts only, but if the irritation is applied to the centre, they all contract. These minute creatures attach themselves to Ascidiz, sea-weeds, &c. In some species three or four starred clusters appear to be piled upon one another. Tue Pyrosoma#, Peron.— Are united in great numbers, so as to form a large hollow cylinder, open at one end, and closed at the other, which swims in the ocean by the alternate contraction and dilatation of the individual animals which compose it. These terminate in points on the exterior, so that the whole surface of the cylinder is bristled with them: the branchial orifices are pierced near these points, and the vents open into the cavity of the tube. We might thus compare a Pyrosoma to a great number of the stars of a Botryllus that had been strung in a line together, but the whole mass remaining moveable. The Mediterranean and Atlantic produce some large species, the animals of which are arranged with but little regularity. They sparkle during the night with all the brilliancy of phosphorus. A small species is also known (P. atlanticwm), in which the animals are arranged in very regular rings. The remaining species of this family have, like the typical Ascidia, the vent and the branchial aperture near each other, on the same extremity of the body. All that are known are fixed, and they have been hitherto con- founded with the Aleyonia. The mass of the viscera of each individual is more or less prolonged in the cartila- * To M. Savigny we are indebted for our knowledge of the singular ; known the peculiar structure of the Botryllus and of the Pyrosoma. organization of this family, which was formerly confounded with the | See the adinirable work of Savigny on Invertebrated Animals, part ii. Zoophytes. At the same time, MM. Desmarest and Lesueur made 384 MOLLUSCA. always represents on the surface a little star with six rays. We unite them all under the name of Polyclinum. Some cover foreign bodies like fleshy crusts; others rise in conical or globose masses. Others again expand into a disk, so as to have a distant resemblance to a flower or an Actinia; or they are lengthened out into cylindrical branches, supported by more slender pedicles; or they are grouped into cylinders (Synoicum, Lam.). It even appears from some recent observations that the Escharide, hitherto arranged with polypiferous Zoophytes, belong to the Molluscans of this family. THE FIFTH CLASS OF MOLLUSCA. ginous or gelatinous common mass, and more or less constricted and dilated at particular parts*; but each orifice THE BRACHIOPODES.f Like the Acephales, the Brachiopodes have a cloak with two lobes, and this cloak is always open. In place of a foot, they have two fleshy arms, garnished with numerous fila- ments, which they can push beyond the shell and withdraw within it: the mouth is between the insertions of the arms. We are not well acquainted with their organs of generation, nor with the nervous system.{ They are all covered with a fixed bivalve shell, and are conse- quently destitute of lecomotion. We only know three genera of them. Tut Lineuts, Bruyi— Have two equal, flattish, oblong valves, with the beaks at the end of one of the narrowest sides, gaping at the opposite end, and attached between the two beaks to a fleshy pedicle, by which they are sus- pended to rocks. Their arms are rolled up spirally, to lie within the shell. It appears that their branchiz consist of little leaflets, arranged all round each lobe of the cloak, on its internal surface. Only ene species (Lingula anatina, Cuv.) is known, from the Indian Ocean. [Mr. Broderip has described two other species. | THE TEREBRATULA, Brug.— Have two unequal valves united by ahinge: the summit of one, more protuberant than the other, is per- forated to permit the passage of a fleshy pedicle which attaches the shell to rocks, madrepores, other shells, &ec. Internally, a small bony framework is observed, that is sometimes sufficiently complex, composed of two branches, which articulate with the imperforate valve, and which support the two arms, edged all round with long, closely-set fringes, between which there. is, on the side next to the large valve, a third simply membranous and much longer appendage, usually spirally convoluted, and fringed like the arms. The mouth is a small vertical fissure between these three large appendages. The principal part of the body, situated near the hinge, contains the numerous muscles, which reach from one valve to the other, and between them are the viscera, which occupy but little space. The ovaria appear to be two ramose productions, adherent to the parietes of each valve. I have not yet been able to satisfy myself in regard to the position of the branchia. Numberless Terebratule are found, in a fossil or petrified state, in certain secondary strata of ancient formations. The living species are less numerous. There are some species broader transversely, or longer in the direction perpendicular to the hinge, with a margin entire, or emarginate, or three-lobed, or with several lobes; there are even some that are triangular: their surface may be smooth, or furrowed, or veined: they are thick, or thin, or even transparent. In several, instead of a hole in the apex of their valve, there isan emargination, and this is sometimes partly formed by two accessory pieces, &c. It is probable that the animals, when better known, will present generic differences. AlI- ready there have been recognized in the Spirifer, Sow., two large cones, formed of a spiral thread, which appear to have been the supports of the animal. In the Thecidea, Def., the support seems to have been incorporated with the small valve. Tue OrpicuLa, Cuy.— Have two unequal valves, one of which, being round and conical, resembles the shell of a Patella: the other is flat, and adherent to rocks. The arms of the animal (Crispus, Poli) are ciliated and spirally curved, like those of the Lingula. * On these peculiarities Savigny has founded his genera Polyclinum, t [Mr. Owen has an admirable memoir on their anatomy in the Ist Aplidium, Didemnum, Eucalium, Diazona, Sigillina, &c., which vn) of the Trans. of the Zoological Society.) § Observations more precise than any we yet have made appear necessary before we can arrange the Mugas of Sowerby, the Strigoce- phates of Defrance, and some other groups, near this one. it appears to us unnecessary to preserve. + Palliobranchiata of M. de Blainville. [Rang makes them the Ist order of the Testaceous Acephales. } (sy) GO On CIRRHOPODLS. ur seas produce a small species (Patella anomala, Mull.). The Discin, Lam., are Orbicule whose inferior valve is notched with a fissure.* We must also approximate to the Orbicule, The Crania, Brug., whose animal has equally ciliated arms, but the shells have deep and round internal mus- cular impressions, in which some have fancied they saw a likeness to the figure of a skull. One (Anumia cranio- Jaris, Linn.) is a native of our seas. There are many fossil species, of which M. Hoeninghaus has given a beautiful monograph. [The Producta of Sowerby is a fossil genus, with a shell somewhat like a Cardium in figure, and rendered re- markable by the manner in which the anterior margin is produced beyond the part inhabited by the animal. The species are, to a certain extent, characteristic of the strata of secondary formation, and particularly of the carbon- iferous or mountain limestone. ] THE SIXTH CLASS OF THE MOLLUSCA. THE CIRRHOPODES} (Lepas and Triton, Linn.) In several points of view the Cirrhopodes effect a sort of connection between this sub- kingdom and that of Articulated Animals. Enveloped in a cloak, and im a shell whose valves often resemble those of several of the Acephales, their mouth is furmshed with lateral jaws, and the abdomen with filaments named cirri, arranged in pairs, composed of a number of little ciliated articulations, and representing a kind of feet or swimmers, such as we see under the tail of many Crustacea. The heart is situated in the dorsal region, and the branchie on the sides: the nervous system forms a series of ganglions in the abdomen. However, it may be said that the cirrhous feet are merely the analogues of the articulated appendages of certain Teredines, while the ganglions are in some respects only repetitions of the posterior ganglion of the Bivalves. The position of these animals in the shell is such that the mouth is at the bottom, and the cirri near the orifice. Between the two last cirri there is a long fleshy tube, which has been sometimes inadvertently mistaken for a proboscis; and at its base, near the back, is the vent. The stomach is puckered with a number of little cavities in its parietes, which appear to fulfil the functions of a liver: we notice besides a simple intestine, a double ovary, and a double serpentine canal termi- nating in the extremity of the fleshy tube pre- viously mentioned. ‘The eggs pass through this tube, and in their course are exposed to the influence of the seminal fluid. The Cirrhopodes are all fixed. Linneus considered them all as belonging to one genus, which Bruguiéres divided into two, and these have recently been much subdivided. Toe Anatira, Brug.— Hlas a compressed cloak, open on one side, and sus- pended to a fleshy tube, varying greatly as to the number of testaceous pieces with which it is furnished. The animal has twelve pairs of cirri, six on each side ; those nearest the mouth are the shortest and thickest. The branchiz are elongated pyramidical appendages, that adhere to the external base of the whole of the cirri, or of part of them. In the commonest species (Pentalasmis, Leach) the two principal valves have a considerable resemblance to those of a Mussel; two others serve to complete a part of the margin of the shell opposite the beak ; and a fifth odd one unites the Fig. 194.—Group of Anatifa, attached to a ship's bottom, ~ (7 We have shown that Lamarck’s new geuus Discina ought to be | Orbicula norvegica, which we sent to him.”—Sowerby.| entirely expunged, as being actually formed from some specimens of 4 The Cirripedes of Lamarck: the Nematopodes of Blainville. cc 386 MOLLUSCA. posterior margin to that of the opposite valve: these five pieces cover the whole of the cloak. From the place where the ligament should be springs the fleshy peduncle. A strong adductor muscle unites the two valves near their beaks. The mouth of the animal lies concealed behind them, and the posterior end of the body, with all its little articulated feet, comes out a little further down, between the first four valves. The widest spread species in our seas (Lepas anatifera, Linn.) has got its name from having given rise to a fable of its being the original or parent of the Barnacle-goose. They grow attached to rocks, piers, to the bottom of ships, &c. We may distinguish the Pollicipes, Leach, which, besides the five prin- cipal valves, has several small ones near the pedicle. In some species these valves [ almost equal the primary in size. There is often an odd one opposite the normal oddone. [Scalpellum, Leach, consists of thirteen valves, six on each side and one dorsal; and its peduncle is squamose.] Cineras, Leach.—The cartilaginous cloak incloses five valves, but of small size, so as not to occupy the whole surface. Otion, Leach.--The cloak contains only two very small valves, with three little pieces which scarcely merit that name; and there are two tubular appendages in the shape of ears. Tetralismis, Cuv., has only four paired valves encircling the aperture, two being longer than the others. The animal is partly contained in the pedicle, which is wide and hirsute. They are, in some degree, Balani without a tube. ([Zithotrya, Sow., is pedunculated like Anatifa, but has, at the base of the peduncle, a shelly appendage analogous to the testaceous base of Balanus, and possesses besides a peculiarity not to be found in any other genus of this class, that of penetrating stones for its habi- tation. ] Fig. 195.—Cineras Cranchii, Tue Bavanus, Brug., or ACORN-SHELLS. The principal part of the shell consists of a testacous tube attached to various bodies, the aperture of which is more or less closed by two or four valves. This tube is formed of various pieces or com- partments, which appear to unloose or separate in proportion as the growth of the animal requires additional room. The branchiz, the mouth, the articulated tentacula, and the anal tube, differ little from the same parts in the Anatifa. In Balanus, properly so called, the tubular portion of the shell is a truncated cone, formed of six outer valves, separated by as many inner ones, three of which are narrower than the others. Their base is usually formed of a calcareous lamina, fixed to various bodies. The four valves of the operculum close the aperture exactly. The rocks, shells, and piers of all our coasts are, in a manner, covered with a species, the Lepas balanus, Linn. There have been separated from these the Acasta, Leach, whose base is irregular, con- vex outwardly, and not fixed: the greater number live within sponges. [Sowerby reunites Acasta to Balanus.] Conia, Blainv., whose shell has only four exterior valves. [On the contrary, in the Octomeris, Sow., the pieces or valves amount to eight.] Asema, Ranz., whose shell has no well-marked exterior valves. Purgoma, Say-, whose shell forms a very depressed cone, with Only a very small aperture, almost as in a shell of the Fissurella. Ochthosia, Ranz.,which have only three outer valves, and a bivalved operculum. Creusia, Leach, with four outer valves, and a bivalved operculum, M. de la Lamarck sepa- rates, under the name of Coronula, the depressed species in which the valves are loosely cellular ; and under that of Tubicinella, the species which form an elongated cone, but narrowest at the base, and girded with ring's that mark the successive epochs of its growth. There are species of both genera which plant themselves on the skin of Whales, and penetrate into their lard. Diadema, Ranz.—The shell is almost spherical, and has only two small valves, almost concealed in the membrane that closes their operculum. The opercula do not shut the aperture entirely without the aid of the mem- brane that unites them. They also live upon Whales; and we often find Otions attached to their surface. Fig. 196.—B, spinosus. Fig. 197.—Conia radiata. a ee ee THIRD GREAT DIVISION OF THE ANIMAL KINGDOM. THE ARTICULATED ANIMALS. Tuts third general type of organization is quite as strongly characterized as that of the Verteb;ata. The skeleton is not internal, as in the latter: but is seldom altogether absent, as in the Mollusks. The articulated rings which encircle the bedy, and frequently the limbs, supply the place of skeleton—and being, in almost every instance, tolerably hard, furnish the necessary resisting fulcra to the muscles of loco- motion ; whence, as among the Vertebrates, we find that the several actions of stepping, running, leaping, swimming, and flying, are performed by them. There are also some families among them that are either footless, or have merely soft and membranous articulated limbs, by which they can at most crawl. This external position of their hard parts, with the muscles inward, reduces each articulation to the condition of a case, and only permits of two kinds of movements. When attached to the next arti- culation by a closed joint, as in the instance of the limbs, the only motion is by ginglymus, that is, in a single direction, so that numerous articulations are required to impart variety of action: and from this results a very great loss of power in the muscles, and consequently a general feebleness in the creature in proportion to its magnitude. The articulated pieces which compose the body frame-work, however, are not always thus connected; being oftener united by flexible membranes only, which slide considerably one over another, and so allow of more varied movements, but not of the same force. The system of organs in which all Articulated Animals bear the nearest resemblance to each other, is that of the nerves. Their brain, placed over the cesophagus, and supplying nerves to the parts ad- jacent to the head, is very small. Two chords, which encircle the cesophagus, are continued along the abdomen, and are connected at intervals by double knots or ganglia, from which the nerves of the body and of the limbs are sent forth. Each of these ganglia seems to perform the functions of a brain to the adjoining parts, and continues for a certain time to confer sensibility on them, after the animal has been divided. If to this be added, that the jaws of these animals, whenever they have any, are invariably lateral, and open and shut outward and inward, and not upwards and downwards, and that in none of them has a distinct organ of smell yet been dis- covered, nearly all has been expressed which it seems can be stated of them generally: for the existence of organs of hearing; the presence, number, and form of those of sight; the productiveness and mode of generation*; their kind of respiration; the ex- *A remarkable discovery connected with this subject is that of | See his Dissertation on the Eggs of Spiders, Marbourg, 1824; and M. Herold, who found that in the egg of Crustaceans and Arach- | that of M. Rathke on the Eggs of Crahs, Leipsic, 1829. nides, the yolk communicates with the back through the interior.— eo? 388 ARTICULATED ANIMALS. istence of organs of circulation, and even the colour of the blood, offer very great vari- eties,which must be studied under the various subdivisions. DISTRIBUTION OF ARTICULATED ANIMALS INTO FOUR CLASSES. The members of this great division, which have mutual relations as varied as they are numerous, still present themselves under four principal forms, whether we regard them externally or internally. The AnnewipvEs, Lamarck, or Red-blooded Worms, constitute the first. In these, the blood is generally of a red colour, like that of the Vertebrates, and circulates in a double and close system of arteries and veins, which have sometimes one or several hearts or fleshy ventricles, tolerably well marked: they respire by organs, which are either developed externally, or are spread over the surface of the skin, or concealed internally. The body, which is more or less elongated, is always divided into nu- merous rings, of which the first, which is termed the head, scarcely differs from the rest, except by the presence of the mouth and of the principal organs of sense. Several have their branchie uniformly spread over the surface of the body throughout its whole length, or only about the middle ; others, and such as inhabit tubes, generally have them only at the anterior portion. None have any articulated limbs; but the greater number are furnished with silky feet, or bundles of stiff and mobile filaments, instead of them. They are generally hermaphrodite, and some require a reciprocal fecundation. The organs of the mouth consist either of jaws more or less powerful, or of a simple tube : their external sensitive organs are fleshy tentacles, which in some are articulated ; and upon which are certain blackish points, that have been considered as eyes, but which are not present in all the species. The Crustaceans constitute the second form, or class, of Articulated Animals. These have articulated limbs, more or less complicated, attached to the sides of the body. Their blood is white, and circulates by means of a fleshy ventricle placed towards the back, which receives it from the gills, situate at the sides of the body, or at its hinder portion, and to which it returns by a ventral canal that is sometimes double. In the species last alluded to, the heart or dorsal ventricle is lengthened into a canal. ‘These animals are all furnished with antenne or articulated filaments, attached to the fore- part of the head, and which are generally four in number ; besides which, they have several transverse jaws, and two compound eyes. It is among these only [through- out the Articulata] that we find a distinct auditory apparatus. The third class of Articulated Animals is that of the AkacunrpEs, which, in common with a great number of Crustaceans, have the head and thorax joined into a single piece, with articulated limbs on each side, but the principal viscera of which are con- tained in the abdomen, which is attached to the hinder portion of the thorax. Their mouth is armed with jaws, and they have a variable number of simple eyes in the head ; but never any antenne. Their circulation is performed by a dorsal vessel, which gives out arterial ramifications, and receives venous ones ; but the manner of respira- tion varies, some having true pulmonary organs with orifices leading to them at the sides of the abdomen, and others receiving air by means of trachee, in the same manner as Insects. All, however, have lateral apertures for this purpose, or true stigmata. Insects constitute the fourth class of Articulated Animals, and the most numerous en nn nn nnn Tae ANNELIDES. 389 im species of any throughout the Animal Kingdom. With the exception of some genera (the Myriapoda), which have the body divided into a great number of subequal articulations, they all consist of three parts: the head, upon which are the antenne, the eyes, and the mouth; the thorax or corselet, which bears the feet, and the wings whenever these exist ; and the abdomen, which is suspended to the thorax, and con- tains the principal viscera. Insects that have wings do not possess these [externally ] before a certain age, and often pass through two forms or stages, more or less different, before they assume the winged state. ‘They respire in all these states by means of trachez, which are elastic vessels that receive the air by orifices termed stigmata, pierced in their sides, and which are distributed by minute ramifications over every part of the body. The only vestige of a heart consists of a vessel which runs along the back, and alternately contracts along its course, but to which no branches have been discovered : hence it is believed that the nutrition of the several parts is effected by imbibition ; and it is probably this mode of deriving the nutriment which necessitates the kind of respiration proper to these animals, the nourishing fluid not being con- tained in vessels*, wherefore, as there was no means of directing it towards cir- cumscribed pulmonary tubes to be aérated, the latter are consequently diffused over the whole body, instead. Thus’ it is, also, that Insects have no secretory glands, but merely long spongy vessels, which appear, over their whole surface, to absorb the several juices that should produce them, from out of the mass of nutritive fluid. Insects vary endlessly in the form of their manducatory and digestive organs, as also in the industry of their habits, and mode of life. Their sexes are always separate. The Crustaceans and Arachnides were long confounded with them under a common name ; and in many respects bear a considerable resemblance to them, in external form, the disposition of their organs of movement, their sensations, and even manducation. THE FIRST CLASS OF ARTICULATED ANIMALS,— THE ANNELIDES,— Are the only Invertebrate Animals that have red blood: this circulates in a double system of complex vessels. Their nervous system consists of a double nervous chord, the same as in Insects. Their body is soft, more or less lengthened, and often divided into a very considerable number of segments, or at least of transverse folds. Almost all of them (the Earth-worms excepted) live in water. Many bury them- selves in holes at the bottom, or construct for themselves tubes of mud and other matters, or even transude a calcareous substance, which forms a sort of tubular shell. DIVISION OF THE ANNELIDES INTO THREE ORDERS. This class, not a very numerous one, offers in its respiratory organs the basis of three sufficient divisions. Some have their branchiz in form of tufts or arbuscules, attached to the head, or * M. Carus has observed various movements in the fluid which fills &c.,in German. Leipsic, 1827, 4to. the body of the larve of certain Insects ; but these movements do not + See, upon this subject, my Memoir on the Nutrition of Insects, take place ina system of closed vessels, as in the higher animals.— | printed in 1799, amony those of the Natural History Society of Paris See his Treatise, intitled Discovery of a simple Circulation of Blood, | Baudouin, An viy, 4to, p. 32. So Ee ee Bee Se ee ee 390 ANNELIDES. to the anterior portion of the body. Nearly all of them imhabit tubes, and we term them Tubicole. Others have upon the middle portion of their body, or ail along their sides, branchiz in form of arbuscules, crests, lamine, or tubercles, in which vessels ramify. The greater number live in mud, or swim freely in the water; only a very few inhabiting tubes. These we denominate Dorsibranchiata. Finally, others have no apparent branchie, and respire either over the surface of the skin, or, as is believed in some cases, by their internal cavities. ‘The greater number live freely in water, or in mud; some, however, in humid earth: and we designate these Abranchiata. The genera of the two first orders have all silky bristles, of a metallic colour, upon the sides, either simple or in bundles, and which supply the place of feet ; but in the third order, there are some genera devoid of all such support.* The particular study which M. Savigny has made of these feet or locomotive organs, has led him to distinguish, firstly, the foot or tubercle which bears the bristles, of which there is either one only upon each ring, or two, one above the other, which he respectively terms a simple or double oar; secondly, the bristles which compose a bundle upon each oar, varying much in consistence, and which either constitute true spines, or fine and flexible filaments, that are often dentelated, barbed, or irregularly so, &c.; and thirdly, the cirrhi, or fleshy filaments, adhering either to the inside or outside of the feet. With respect to their organs of sense, the two first orders of Annelides have gene- rally tentacles to the head, or filaments, which, notwithstanding their fleshy consis- tence, some moderns have designated antennz ; and several genera of the second and third orders have black and shining points, which have been regarded as eyes. The organization of the mouth varies exceedingly. (The Annelides constitute one of the many small, but singular and highly interesting, tribes of animals, which, from being upon the confines of the peculiar class or sub- kingdom to which they in effect belong, exhibit, in a remarkable degree, the modifi- cations of other higher groups: thus, by an ordinary observer, these creatures would be at once classed as Worms; and the common Earth-worm, one of them, would be regarded as the type of the grand class of Linnzan Vermes, the great majority of which, however, do not even belong to this great subkingdom, but to that of the Zoophytes, from which these articulated animals are at once distinguished by the possession of red blood circulating in a well-defined system, and a far more perfect developement of the nervous system; still, in their vermiform appearance, and in the elongated filaments with which many of them are furnished, they resemble certain Zoophytes,—on the other hand, they approximate to the most imperfect Fishes, such as the Lampreys and others, in which the spine has disappeared. Their annulose character, and nervous system, however, bring them nearer to the true Annulosa, especially the Myriapoda ; this will at once be evident by comparing the figures of Geophilus longicornis, given in p- 486, with that of Syllis monilaris here figured. Mr. Mac Leay accordingly con- * M. Savigny has proposed a division of the Annelides according to | he mingles with the dpudes many intestinal Worms, which M. their possessing locomotive silky bristles, or not so; reducing the Savigny does not admit. latter to the Leeches. M, de Blainville, who has adopted this idea, + Mr. Mac Leay considers that they form the immediate connexion ranges the bristled Annelides asa class, termed Entomozoaires Che- | between such Vertebrata as Amphioxus and Mynine, and such Annu- topodes, aud the others as one designated Entomozoaires Apodes; but | losa as Porocephalus, and other white-blooded Vermes, which have the sexes distinct. (dnn. Nat. Hist., Feb. 1840.) a ee ee el TUBICOLZ. 391 siders them as the intermediate link between the Vertebrata and Annulosa, ob- serving upon the curious circum- stance that these two subkingdoms, so highly organized in the scale of the creation, should be linked to- gether by a group exhibiting such great imperfections of structure. Fig. 198.—Syllis monilaris, with one of its locomotive organs and setigerous appendage attached thereto. This class has been greatly neg- lected in this country. Dr. Johnston has, however, described various species (especially in the Annals of Natural History, for February, 1840), and Mr. Mac Leay, in the same number,* has noticed several fossil species. It is, however, in France that the greatest attention has been paid to them, especially by Savigny, Audouin, and Milne Edwards. ] THE FIRST ORDER OF ANNELIDES. THE TUBICOLE. Some species of this division form a homogeneous, calcareous tube, which probably results from their transudation, like the shells of the Mollusks, but to which the muscles do not adhere ; others construct tubes, by agglutinating grains of sand, fragments of shells, and particles of mud, which they join by means of a membrane, which likewise is doubtless transuded ; lastly, there are some, the tubes of which are entirely membranous, or horny. To the first group belong SEeRPuULA, Linn.,— The calcareous tubes of which invest, from their twisting about, fragments of stones, shells, and all sorts of submarine matters. The truncation of these tubes is either round or angular, according to the species. The animal within has its body composed of a great number of segments; its fore-part widened into a disk, furnished on each side with many bundles of stiff bristles; and on either side of its mouth is a tuft of fan-like gills, in general vividly coloured. At the base of each tuft is a fleshy filament; and one of these, on the right or left side indifferently, is always prolonged and di- lated at its extremity into a variously-formed disk, which serves for an operculum and mouth at the entrance of the tube when the creature retires into it. The common species (S. contortuplicata, Ellis), has a round and twisted tube three lines in diameter. Its operculum is funnel-shaped, and its gills often ofa fine red, or varied with yellow, violet, &c. This animal quickly fabricates its tube of mud, aggluti- nating into it whatever small objects lie around. There is another and smaller species on our coasts, with a club-shaped operculum, armed with two or three little points (S. vermicularis, Gmelin). Its gills are sometimes blue. Nothing is more beautiful to see than a group of these Serpule when their wings are expanded. In other species, the operculum is flat, and bristled with more numerous points. These are the Galeolaria, Lamarck. There is one in the Antilles (S. gigantea, Pallas), which is found among the Madre- Fig, 199.—S. contortuplicata, pores, and the tube of which is often inclosed in their mass. Its gills roll up spirally SARS AURORE: when they are withdrawn, and the operculum is armed with two little branching horns * Mr. Mac Leey has given the following quinarian distribution of the class in the memoir noticed above. ANNELIDA. Normat Gaovur. Bolypadas fi Nercidina.... Animals free, having a distinct head, provided with eyes, or antennae, or both, MA ee ayy a pods, L Serpulina.... Animals sedentary, and having no head, provided with eyes or antenne. provide z ABERRANT GRouUP. Lumbricina.. Animals without eyes or antenni ; body externally setigerous for locomotion ; articula- tion distinct. bE 3 k ae Nemertina .. Animals aquatic, without eyes or anteune ; body not externally setigerous; articulation Body without feet, or a distinct eaasatiue indistinct. eet Hirudina.... Animals provided generally with eyes, but not with antenna ; body not externally seti- gerous ; articulation distinct. 392 ANNELIDES. like the antlers of a stag. This is the Terebella bicornes, Abeldy., and the Actinia or Animal-flower of Home. M. Savigny has made of it his subdivision of Serpules cymospires, which M. Blainville elevates to the rank of a genus. M. Lamarck distinguishes the Spirorbis, the branchial filaments of which are much less numerous (three or four only on each side); their tube is of a tolerably regular spiral form, and they are mostly very small: such is S. spirellum, Pallas, and S. spirorbis, Muller. SABELLA, Cuv. (Amphitrite, Lam.) The same body and fan-like gills as in Serpula, but with the fleshy filaments adhering to the bran- chi, pointed, and neither of them forming an operculum; they are also not always present. Their tube appears oftener composed of granules of clay or very fine mud, and is rarely calcareous. The known species are rather large, and their branchial tufts are of an admirable delicacy and beauty. Some, like the Serpule, have on the anterior portion of the back a membranous disk, across which pass the first pairs of their bundles of bristles ; their branchial pectinations are turned spirally, and their tentacles reduced to slight folds. They are the Serpules spiramelles of M. Savigny, and the Spiramilla, Blainville. A large and beautiful species inhabits the Mediterranean, witha calcareous tube like that of the Serpule, or orange-coloured gills, &c., the S. protula, Nobis, or Pastula Rudolphii, Risso. Others have no membranous disk on the foreparts, and their branchial pectinations form two equal spires, the Sabelles simples of M. Savigny. Such are ‘Amphritite reniformis, Muller, or Tubularia penicillus, 1d.; also Tere- bella reniformis, Gmelin, together with the Amphritite infundibulum, Montagu, and A. vesiculosa, Id. There are some with a double range of filaments on each pectination—the Sabelle Astarte, Say., such as S. grandis, Cuv., or S. indica, Say., and the Tubularia magnifica, Shaw. Others in which one pectination only is twirled, the others being smaller, and enveloped within the base of the first. The Sabelles spirographes, Sav., as S. unispira, Cuv., and Spirographis Spallanzani, Mart. In some the gills do not form a simple funnel round the mouth, but numerous filaments, which are serrated and strongly ciliated on the internal face; the silky feet of these are almost imperceptible—such is S. villosa, Cuv. Lastly, some have been described with six filaments disposed like a star—the Fabricia of Blainville. TEREBELLA, Cuv.,— Like the greater number of species of Sabella, inhabit a factitious tube, but which is composed of grains of sand, and fragments of shells; their body has much fewer rings, and the head is differently ornamented. Numerous filiform tentacles, capable of much extension, surround the mouth, and upon the neck are gills of an ar- buscular, and not a fan-like form. There are several On our coasts which were long confounded under the name of Terebella conchilega, Gm., and which are mosty remarkable for having their tubes formed of large frag- ments of shells, the aperture having its borders prolonged into several small branches formed of the same fragments, which serves to lodge the tentacles. The greater number have three pairs of branchiez, which in those with branched tubes pass through a hole for the purpose; they are the Terebelles simples, Sav. Fig. 200.—Terebella medusa, in its tube. AMPHITRITE, Cuv.— Are easily recognized by their golden-coloured spines, disposed in a comb-like series, or in a crown, in one or several ranges upon the forepart of the head, and which probably serve them for defence, or perhaps to crawl with, or to gather up the mate- rials for the tube. Around the mouth are very numerous ten- tacles, and on either side of the commencement of the back are pectinated gills. Some of them compose slight tubes, of a regular conical form, which they carry about with them. Their gilded spines form two comb-like series, the teeth of which are directed downwards ; and the intestine is very ample, and several times folded, being ordinarily full of sand; they are Pectinaires of Lamarck, the Amphyctines, Sav., the Chrysodons, Oken, and the Cistena, Leach. Such, upon our coasts, is the A. belyica, Gmelin, with a tube two inches long, formed of small round granules of various colours. A much larger species occurs in the Southern seas, 4. auricoma capensis, Pallas, the slender and polished tube of which appears as though transversely fibrous, and formed of a soft fucus-stem-like substance, dried up. There are some species which inhabit factitious tubes fixed to various substances. Their gilded spines form several concentric crowns upon the head, whence results an operculum that closes the tube when they contract into it, but which has two parts that can be spread asunder. They have a cirrhus on each foot. Their body Fig. 201.—Terebella variabilis. DORSIBRANCHIATA. 393 terminates behind into a tube recurved over the head, doubtless for the purpose of emitting their excrements. 1 have found in them a muscular gizzard. Such upon our coasts is the Sabella alveolata, Gmelin, or Tubiporaarenosa, Linn., the tubes of which, united into a compact mass, present orifices rather regularly disposed, like the cells of a honey-comb. The Amphitrite plumosa, Faby., should perhaps range here, of which M. Blainville has formed his genus Pherusa. Amph. ostrearia, Cuv., establishes its tubes upon Oyster-shells, and is reputed to check the propagation of their inmates. To this order I suppose must be approximated Tue Sypuostoma, Otto,— Which have a bundle of fine silky bristles above each articulation, a simple bristle below it, and at the fore extremity two bundies of stiff and gilded bristles, beneath which is the mouth, preceded by a sucker encircled by many soft filaments, that perhaps subserve the office of branchie, and which are accompanied by two fleshy tentacles. Their medullary nervous cord may be seen through the skin of the belly. They live deep in the mud. The species are S. diplochoites, Otto, and S. uncinata, Aud. and Edw. Lastly, in the vicinity of the same group, has lately been placed DeENTALIUM, Linn.,— The species of which have a shell in form of an elongated cone, arcuated, and open at beth ends, which may be compared to an Elephant’s tusk in miniature; but the recent observations of M. Savigny, and especially of M. Deshayes, render this classification very doubtful. The animal does not appear to haye any appreciable articulations, nor lateral silky bristles; but it has a membranous tube, in the interior of which is a sort of foot, or fleshy and conical operculum, by which it closes the orifice. At the base of this foot is a small, flat head, and there are BR ees tate) cats feather-like branchiz upon the neck. If the operculum approximates the tube. foot of the Tubulibranchiate Mollusks (Vermetus and Siliguaria), the gills are rather those of Amphitrite and Teredella. Further observations on their anatomy, and principally on their vascular and nervous systems, are required to solve this problem. Different species have the shell angular, longitudinally striated, or round. Among the first are D. elaphantinum, Martini, &c. ; among the second, D. dentalis, Rumpf.; and among the third, D. entalis, Martini. THE SECOND ORDER OF ANNELIDES,— THE DORSIBRANCHIATA,— Have their organs, and particularly their gills, distributed about equally throughout the length of the body, or at least its middle portion. We place at the head of them certain genera, in which the gills are more developed. ARENICOLA, Lam. Gills of an arbuscular form, upon the rings of the middle part of the body only. The mouth a fleshy trunk, more or less dilatable, but no discernible teeth. tentacles, or eyes. The posterior extremity of the body devoid not only of gills, but also of bundles of silky bristles, which occur on the other part ; no cirrhus on any ring of the body. M. Savigny forms of them his family 7'éléthuces. The common species (Lumbricus marinus, Linn.), is very abundant in the sand of the sea shore, where the fishermen dig for it to serve as bait. It is nearly a foot long, of a reddish colour, and diffuses, on being touched, a quantity of yellow fluid. It has three pairs of gills. AMPHINOME, Brug. A pair of branchiz in form of a crest, or a tuft more or less complicated, on each ring of the body, and two bundles of separate bristles, together with two cirrhi, upon each foot. The trunk or proboscis without jaws. These form the family of 4mphinomes of M. Savigny, who divides them into Chloeia, wherein are five tentacles to the head and gills in formof a tripinnate leaf. There is one in the East Indies (Terebelia flava, Gm.), extremely remarkable for its long citron-coloured bundle of bristies, and for its splendid purple tufts of branchi#. Its form is broad and depressed, and it has a vertical crest on the muzzle. 394 ANNELIDES. Pléione, Say. (Amphinome, Blainv.), which, with the same tentacles, have crest-like gills. These also are from the East Indies, and attain a great size. To these may be added Euphrosine, Sav., which has but one tentacle to the head, together with arbuscular gills, very much developed and complicated; and to which the genus Anisteria, Say., established on a mutilated individual, should probably be approximated ; and, lastly, Hipponoe, Audouin & Edwards, which, devoid of caruncle, has only one cirrhus and packet of bristles to each foot. There is one at Port Jackson, H. Gaudichaudii, Aud. & Ed. Eunicr, Cuvy.— Is likewise furnished with tuft-like gills, but the trunk is formidably armed with three pairs of differently-formed horny jaws; each of their feet has two cirrhi and a bundle of bristles ; and there are five tentacles upon the head above the mouth and two on the neck. Some species only exhibit two small eyes. M. Savigny’s family of Lunices is constituted by this division, and the particular genus is termed by him Leodice. Fig. 203.—Euphrosine laureata. A species, from one to four feet in length, inhabits the sea around the Antilles (Z. gigantea, Cuv.), which is the largest Annelide known. Some upon our coasts are much smaller. M. Savigny distinguishes by the name of Marphisia certain species, otherwise very similar, which have no nuchal tentacles, and the upper cirrhus of which is very short, as Nereis sanguinea, Montagu. An allied species (N. tubicola, Muller), inhabits a horny tube. After these genera with complex branchie, are placed those in which the organs adverted to are reduced to simple laminz, or even to slight tubercles, or which, lastly, are represented only by the cirrhi. Some of them resemble Eunice by the powerful armature of the trunk, and by their antennz of unequal number. Such are Lycrpice, Sav.,— Which, together with the jaws of Eunice, or even a greater number than in that genus, and often un- equal on the two sides, have but three tentacles, and cirrhi to perform the office of branchiz. AGLAURA, Sav.— Have likewise numerous jaws, of an unequal number, seven, nine, &c.; but no tentacles, or which are entirely hidden ; and the gills are similarly reduced to cirrhi. Under this name I unite the Aglaura and Ginone of Savigny, and even certain species without tentacles, which MM. Audouin and Edwards leave in Lycidice, as Ag. fulgida and C2. lucida. Tue Nerrerps, properly so called (Nereis, Cuv.; Lycoris, Sav.). Tentacles of an even number, attached to the sides of the base of the head, two other biarticulated ones a little more forward, and between these two simple ones; only one pair of jaws within the trunk; the gills formed of little laminz, traversed by a network of vessels; and at each of their feet two tubercles, two bundles of bristles, and a cirrhus above and below. A great number of species inhabit our coasts. (The species here figured, N. prolifera (Mul- ler, Zool. Dan.), exhibits a singular peculiarity in its mode of propagation, merely by sponta- neous division, the hind part of the body being gradually transformed into an additional animal, the head and tentacular cirrhi being already de- veloped. Muller describes one mother, to which three feetuses, of different ages, appeared in one length. The mother had thirty segments, the young one nearest to it had eleven, and the two hinder, or older ones, seventeen segments each. ] Vig. 204.--Nereis prolifera. After these should rank various genera. equally distinguished by a slender body, and gills reduced to simple laminz, or even to simple filaments or tubercles. Several, however, have no jaws nor tentacles. Puy.iopoce, Sav. (Nereiphylla, Blainy.),— In common with the Nereids proper, have tentacles of even number at the sides of the head, and four or five small ones anteriorly. They have distinct eyes; their large trunk is furnished with a circlet of very short fleshy tubercles, does not contain jaws, and, what particularly distinguishes them, their a ee ee DORSIBRANCHIATA. 395 gills are in the form of very broad leaves, forming a range on each side of the body, upon which minute vessels ramify extensively. ¥ The V. viridis, Muller, of which M. Savigny, without having seen it, proposes to make a genus Eutalia, and the two species of Eunomia, Risso, appear to me to belong to Phyllodoce, to which also, perhaps, should be referred the Nereis pinnigera, Montagu, and the N. stillifera, Muller, which M. Savigny, without seen them, proposes to make into a genus Lepidia, and N. longa, Otto, which M. Savigny places with N. flava in his genus Etiona. All these require to be examined anew after the method detailed by M. Savigny. The genus Phyllodoce, Sav., however, must not be confounded with that of M. Ranzani, which latter is allied to Aphrodita, and especially to Polynoe. Auciopg, Aud. & M. Edwards,— Have nearly the mouth and tentacles of Phyllodoce, but the feet present, besides the tubercle which bears the bristles and the two foliated cirrhi, or gills, a couple of branchial tubercles, which occupy its upper and lower borders. Spio, Fabricius & Gmelin. A slender body ; two very long tentacles that have the appearance of antenne ; eyes upon the head, and on either side of each segment of the body a gill in form of a simple filament. They are small northern Sea-worms, which inhabit membranous tubes. Polydore, Bosc., appears to me to be referrible to this genus. SyLuis, Sav.— Have tentacles of uneven numbers, articulated in chaplets, together with upper cirrhi to the feet, which are very simple, and bear no bundles of silky bristles. It appears that they vary with respect to the existence of jaws. S. monilaris, Say. [figured in p. 391 ante}, the Nereis armillaris, Muller, of which M. Savigny, without having seen it, proposes to make a genus, which he terms Lycastis, having tentacles and cirrhi in chaplets, like a Syllis; but the former, represented to be of even number, requires farther examination. Gtyceris, Cuv.— Are recognized by the form of the head, which terminates in a conical fleshy point, having the aspect of asmall horn, and the summit of which divides into four very small tentacles, that are scarcely visi- ble. The trunk of some of the species contains jaws, which cannot be perceived in others. Such are Nereis alba, Muller, and Glyc. Meckelii, Aud. & Edw. Nepatuys, Cuv. The trunk of Phyllodoce, but no tentacles; and on each foot two bundles of bristles widely sepa- rated, and a cirrhus between them. LomBrINEREIS, Blainv.— Have no tentacles; the body, considerably elongated, has merely a small forked tubercle at each arti- culation, which bears alittle packet of silky bristles. If there be any external respiratory organ, it can only be the upper lobe of this tubercle. Nereis abranchiata, Poll., Lumbricus fragilis, Muller, of which latter M. Blainville makes, but doubtfully, his genus Scoletome. The Scolelepe, Blainv., which are only known by the figure of Abildgaart (Lumbricus squamatus), have a very slender body, with numerous rings, each of which has a cirrhus that serves for a gill, and two bundles of silky bristles, the lower of which seems to consist of a fold of skin compressed like a scale, and the head has neither jaws nor tentacles. . AriciA, Sav.,— Have neither teeth nor tentacles. The body, which is lengthened, bears two ranges of lamelliform cirrhi along the back ; and the anterior feet are furnished with dentelated crests, that do not occur on | the other feet. : Ar. Cuvieri, Aud. and Edw. The Lumbricus armiger, Muller, which M. Blainville, without having seen it, pro- poses to make a genus of, by the name of Scolople, appears to have neither teeth nor tentacles, and bears two small simple bundles of short bristles on its first segments, and on the rest a bifid tubercle, a little bristle, and a long and pointed branchial lamina. HESIONE,— Have a short and rather thick body, composed of few ill-defined rings: a very long cirrhus, which pro- bably fulfils the office of branchiz, occupying the upper part of each foot, which has also another lower one, and a packet of silky bristles, and the trunk large, having neither jaws nor tentacles. Such are H. splendida, Savigny, H. festina, 1d., and H. pantherima, Risso. 396 ANNELIDES. OPHELINA, Say. Body rather thick and short, the rings ill-defined, bristles scarcely visible, and long cirrhi serving for gills upon two thirds of its length; the mouth containing a dentelated crest at the palate, lips sur- rounded with tentacles, of which the two uppermost are larger than the rest. Hereabouts should probably be placed the Nereis prismatica and bifrons of Fabricius. CIRRHATULA, Lam. A very long filament serving for gills, and two little bundles of bristles at each articulation of the body, which are very numerous and much serrated, together with a collar of long filaments around the neck. Head ill-defined, with neither tentacles nor jaws. Lumbricus cirrhatus, Otto, from which the Terebella tenticulata, Montagu, and the Cirrhinereis filiger, Blainville, do not appear to me to differ generically. PALMYRE, Sav. Distinguished by their upper bundle composed of large flattened bristles disposed like a fan, and brilliant as the most polished gold ; the inferior bundles small ; their cirrhi and gills not very distinct. They have a lengthened body, and two long and three very small tentacles. One only is known, from the Isle of France, two inches in length, the P. aurifera, Savigny. Apuropita, Linn. Easily known from the rest of this order by two longitudinal ranges of broad membranous scales, covering the back, to which the name elytra has been given without much reason, and under which the gills lie concealed in form of little fleshy crests. The body is generally flattened, and shorter and broader than in other Annelides. A very thick and muscular cesophagus is observable on dissection, which is capable of being reversed into a trunk externally ; the intestine is unequal, and furnished on each side with a great number of branched cceca, the extremities of which are fixed between the bases of the packets of silky bristles which serve for feet. M. Savigny distinguishes among them the HALIrTHEA,— Wherein are three leaflets, between two of which is a very small crest, and which also has no jaws. There is one upon our coasts, which is among the most beautifully coloured of animals (Aphrodita aculeata, Linn.) Its form is oval, six or eight inches long, and two or three broad. The scales of its back are covered and concealed by a substance resembling tow, which originates at its sides: the latter have also groups of stout spines, which partly pierce the tongue, together with bundles of flexible bristles, as brilliant as gold, and change- able to every hue of the rainbow. The colours they present are surpassed in beauty neither by the scale-like feathers of the Humming-bird, nor by the most brilliant gems. Below them is a tubercle bearing three groups of spines, of three different thicknesses; and finally, a fleshy cover. There are forty of these tubercles on each side, and between the two first are two little fleshy tentacles ; besides which there are fifteen pairs of broad scales, which are sometimes bulged upon the back; and fifteen small branchial crests on each side. (The animals of this group, which greatly resemble, in form, the Euphrosine laureata, figured in a preceding page, are well known under the name of Sea Mice, and are often thrown upon the beach after a gale of wind. In some species the lateral sete exhibit a beautiful structure, admirably fitting them for weapons of defence, being barbed on each side at the tip; but, in order to prevent the injury which might occur to the animals, in consequence of the power it possesses of retracting these sete, each is inclosed in a smooth, horny sheath, composed of two blades.} Some species have no tow-like substance on the back, which are the Halithus hermiones of M. Savigny, and form the genus Hermione of M. de Blainville. There is one in our seas, the Aphr. hystrix, Savigny. Another division of Aphrodita is the Potynog, Sav. (Humolpe, Oken),— Having no scales on the back, and five tentacles, together with strong corneous jaws, within the pro- boscis. Several small species inhabit our coasts. S1GALion, Aud. and Edw.,— Presents a more elongated form than other Aphrodites, with cirrhi upon all the feet. AcorEtss, Id.,— Have cirrhi which alternate with the elytra for a considerable space, and stronger and better dentelated jaws. ABRANCHIA. 397 The Antilles possess a large one, which inhabits a tube of the consistence of leather. The Phyllodoce mavillosa, Ranzani, named Polyodante by Reinieri, and Eumolpe maxima, Oken, appear to be nearly allied, having the same trunk and jaws, and neither genus having perhaps been described from perfect specimens. Many species of Annelides remain, which have been too imperfectly described to admit of their being characterized ; and the Myriane, and two or three other genera of M. Savigny, must remain to be examined anew. Finally, we place here a new and very singular genus, which I name CH2TOPTERUS. Mouth with neither jaws nor trunk, but furnished above with a lip, to which three small tentacles are attached. A disk then follows with nine pairs of feet, after which is a pair of long silky bundles like two wings. The lamina-formed gills are attached more towards the upper surface than the lower, and range along the middle of the body. {Here also ought probably to be placed the genus Peripatus of Guilding, founded upon a West Indian species, which burrows in the sand, and which has much perplexed naturalists as to its relations. By Guilding it was considered as molluscous; by Mac Leay as forming the passage between the Iulide and the annulose annelidous worms; whilst Gray (Zool. Misc. p. 6) asserts that it is annelidous, and connects Fig. 205.—Peripatus LIuliformis. Nereis with Lumbricus.] | iii 4 Pann uh Tn ‘as y AY; a cm Mie RX TN I I QQ p THE THIRD ORDER OF THE ANNELIDES,— ABRANCHIA,— Have no respiratory organ appearing externally, and seem to respire either, as in the Earthworms, over the whole surface of the skin, or, as in the Leeches, by internal cavities. Some of them have yet bristles to serve for locomotion, of which others are deprived, and they accordingly fall into two families. THE FIRST FAMILY OF THE ABRANCHIA,— THE ABRANCHIA SETIGERA,— Which are provided with silky bristles, comprise the Earthworms and Naides of Lianzeus. $ . . Tue Eartuworms (Lumbricus, Linn.)— Are characterized by a long, cylindrical body, divided by transverse furrows into a great number of rings, and by a mouth without teeth: they require to be thus subdivided: Tae True Eartaworms (Lumbricus, Cuv.)— Have neither eyes, tentacles, gills, nor cirrhi: a distinct enlargement, particularly during the breeding season, indicates where they attach themselves to one another in the act of copulating. Internally they have a straight, wrinkled intestine, and some whitish glands towards the fore part of the body, which appear to serve for generation. It is certain that they are hermaphrodite, and it seems that their contact only serves to excite each other to self-fecundation. According to M. Montégne, the eggs descend between the intestine and external envelope, as far as around the rectum, where they hatch, the young crawling out alive by the anus. M. Dufour states, on the contrary, that they deposit eggs analogous to those of the Leeches. Their nervous chord consists of a series of an infinitude of little ganglia, serrated one against another.* M. Savigny subdivides them further into Hnterion, having on each ring four pairs of little bristles, eight throughout, to which belongs The Common Earthworm (JL. terrestris, Linn.).—This well-known species attains to nearly a foot in length, with * T is is common to very many species, as M. Savigny first observed. As many as twenty have been been characterized. M. Duges only distinguishes six 398 ANNELIDES. 120 or more rings; the bulge is towards its anterior third. Under the sixteenth ring are two pores, of which the use is unknown. It pierces the ground in all directions, perforating it remarkably well, and subsists on roots, woody fibres, animal matter, &c. In the month of June it searches at night above ground for a mate. [It is especially in rich and well-manured soils that the Earthworm delights, particularly in gardens and meadows; they are extremely sensitive to movements of the earth; and anglers, knowing well their temerity in this respect, take advantage of it, in order to obtain a supply of these animals for baits, by introducing a spade or fork into the ground, and stirring the soil, when they soon appear on the surface. We are indebted to Charles Darwin, Esq., for a remarkable and interesting memoir on the utility of this animal, read before the Geological Society. The worm casts, which so much annoy the gardener by deforming his smooth-shaven lawns, are of no small importance to the agriculturist; and this despised creature is not only of great service in loosening the earth, and rendering it permeable by air and water, but is also a most active and powerful agent in adding to the depth of the soil, and in covering comparatively barren tracts with a superficial layer of wholesome mould. The author’s attention was directed by Mr. Wedgwood, of Maer Hall, Staffordshire, to several fields, some of which had a few years before been covered with lime, and others with burnt marl and cinders, which substances in every case are now buried to the depth of some inches below the turf, just as if, as the farmers believe, the particles had worked themselves down. After shewing the impossibility of this supposed operation, the author affirms that the whole is due to the digestive process by which the common Earthworm is supported, since, on carefully examining between the blades of grass in the fields above-mentioned, he found that there was scarcely a space of two inches square without a little heap of the cylindrical castings of worms; it being well known that worms swallow earthy matter, and that having separated the serviceable portion, they eject at the mouth of their burrows the remainder in little intestine-shaped heaps. Still more recently Mr. Darwin has noticed a more remarkable instance of this kind, in which, in the course of eighty years, the Earthworms had covered a field then manured with marl, with a bed of earth, averaging thirteer inches in thickness. ] [Fig. 206, b, represents the anterior extremity of the Earthworm, to show the mouth, as well as the sete directed backwards upon the segments of the body, by means of which it is admirably enabled to work its way through the earth, their backward direction enabling it to retain its station as it protrudes its head further into the earth. Fig. c, represents one of its eggs, inclosing, as is sometimes the case, two young; and fig. d represents the escape of the young worm from the egg, the anterior extremity of which is furnished with a peculiar valve-like structure; these two figures are highly magnified. ] Hypogeon, Sav., have an additional single, or uneven, bristle upon the back of each ring. They are only known in America. MM. Audouin and M. Edwards likewise distinguish the Trophonius, which has four bundles of short silky bristles on each ring, and at the anterior extremity a great number of long and brilliant bristles, encircling the mouth. Tue Naipes (Nais, Linn.),— Have the elongated body and the rings less marked than in the Earthworms. They live in holes which they perforate in mud at the bottom of water, and from which they protrude the anterior portion of the body, incessantly moving it. Some have black points upon the head, which have been regarded as eyes. They are small worms, the reproductive power of which is as astonishing as that of the Hydra or Polypus. Many gpecies exist in our fresh waters. Some have very long bristles; others (the Sty/aria, Lamarck) a long protrusile trunk; several (Proto, Oken) have small tentacles at the hind extremity, and there are others with very short bristles. To this genus may be approximated certain Amnelides allied to the Earth- worms, which fabricate the tubes of clay, or debris, into which they retire. Such are the Tubifex of Lamarck, which, however, requires further examination. CLIMEN#, Sav.,— Appears likewise to belong to this family. Their body is rather thick, aM i. coke with few rings, and bears, for the greater portion of its length, a range of strong bristles, and, a little higher up, a bundle of finer bristles on the dorsal aspect. The head has neither tentacles nor appendages ; posterior extremity truncated and rayed, and they also inhabit tubes. THE SECOND FAMILY OF THE ABRANCHIOUS ANNELIDES,—or, Tue ABRANCHIA WITHOUT BRISTLES,— Comprise two great genera, both of which are aquatic. ABRANCHIA. 3$9 Tue Lerecues (Hirudo, Linn.)\— : Mave an oblong body, sometimes depressed, and wrinkled transversely ; the mouth encircled by a lip, and the posterior extremity furnished with a flattened disk, both ends being adapted to fix upon bodies by a kind of suction, by means of which these animals move, for, having fixed their anterior extremity, they draw the other up to it and fix that, and then readvance the first, [besides which, they swim with facility]. Several have a double series of Fig. 207.—Hirudo officinalis ; a, its anterior extremity, shewing the sucker. pores underneath the body, which are the orifices of little internal pouches, considered by some natu- ralists as organs of respiration, although they are generally filled with a mucous fluid. The intestinal canal is straight and swoln at intervals, extending for two thirds the length of the body, where there are true cceca. The blood they swallow continues red, and without alteration, for several weeks. The ganglia of their nervous system are much more separated than those of the Earthworms. They are hermaphrodite, and have a large penis about the anterior third of the body, and a vulva a little behind it. Several accumulate their eggs into cocoons enveloped by a fibrous excretion. [On opening the Leech shortly after it has gorged itself with the blood of its prey, it will be found that none of the blood has passed into the intestines. The operation of digestion is extremely slow, notwithstanding the rapid and excessive manner in which the Leech fills its stomach: a single meal of blood will suffice for many months, nay, more than a year will sometimes elapse before the blood has passed through the intestines in the ordinary manner, during all which period so much of the blood as remains undigested in the stomach continues in a fluid state, and as if just taken in, notwith- standing the vast difference in the heat of the body of a mammiferous animal and that of a Leech. ] — Griffith, An. King., part 35, p. 129. They are subdivided upon characters derived principally from the organs of the mouth. In Ture Lercues, properly so called (San- guisuga, Sav.),— The anterior sucker has the lip divided into several segments; its aperture is trans- versal, and contains three jaws, each armed with a double range of very fine trenchant teeth, which enable them to pierce the skin without inflicting a dangerous wound: Fig. 208.—Developement of Hirudo medicinalis. they have ten minute points, which have been considered as eyes. Every one is acquainted with the medicinal Leech (H. medicinalis, Linn.), so useful an instrument for local blood-letting. Hamopis, Sav.,— Differs by having the teeth less numerous and comparatively obtuse. Such is the common Horse Leach, (H. sanguisorba, Sav.). BDELLIA, Sav.,— Has only eight eyes, and no teeth whatever. There is one in the Nile (Bd. nilotica, Egypt. Ann.) NEPHELIS, Sav.,— Has also but eight eyes, and the mouth with only three folds of the skin interiorly. M. de Blainville terms them Erpoddellis, and M. Oken Helluo. Numerous small species inhabit our fresh waters, among which should be distinguished TrocHetTIa, Dutrochet,— Which differ by having a bulge at the genitals. A species (Geobdella trochetii, Blainy.), is often seen upon the ground, pursuing the Earthworms. 400 ANNELIDES. M. Moquin Tandon has described a subgenus oy the name of dulastoma, the mouth of which has merely longitudinal folds, several in number. In the suite of Nephelis, should be placed the Branchiobdellia of M. Odier, remarkable for having two jaws and no eyes. One species only is known, which lives upon the gills of the Crab. All these subdivisions have the anterior sucker a little separated from the body: the two next are distinguished by a further separation, composing almost a segment, having a transverse aperture. HaMocuHaris, Sav.,— In addition to this conformation, have eight eyes, a slender body, and rings not very distinct. Their jaws do not project, and are scarcely visible: they do not swim, but advance in the manner of the caterpillars termed geometrical, and attach themselves particularly to fishes. They are the Piscicola of Blainville, and the Jethiobdella of Lamarck. Une species is common upon the Carp, (H. pisciwm, Linn.). ALBIONES, Sav. (Pontobdella, Leach and Blainyille),— iffer from the preceding by having the body bristled with tubercles, and eyes only six in number. They live in the sea. There is a parasite on the Torpedo, named Branchellion, very similar to a Leech, but which appears to have a little mouth at the hind border of its anterior disk, which last is borne on a slender neck, and at the base of it is a small hole for the generative organs. The lateral edges of its folds, which are compressed and salient, have been regarded as branchiz, but I cannot perceive vessels ramifying upon them ; the epidermis is ample, and envelopes the creature like a very loose sac. Cuepsines, Sav. (Glossoporis, Johnson) ,— Ranks commonly also among the Leeches. The body is widened, with a disk only behind, and the mouth is formed into a trunk, and not suctorial ; but it is not impossible that some of these belong to the family of Planarie. Phillines, Oken, and Malacobdellis, Blainv., have also a widened body, and want the anterior sucker. Their habits are parasitic. Tue Gorpians (Gordius, Linn.).— Have the body in form of a filament; slight transverse folds, which mark the articulations only; and no feet, branchiz, or tentacles have yet been discerned ; nevertheless, they are internally distinguished by a knotted nervous chord. They should perhaps be placed, however, with the intestinal worms, such as the Nemertes. The various species inhabit fresh water, mud, and inundated grounds, which they perforate in all directions, &c. [We have not unfrequently met with them upon garden-cabbages, and their name is derived from the com- plex knots into which they seemingly entangle their ex- tremely elongated bodies.] The commonest (G. aquaticus, Linn.), is several inches long, and scarcely thicker than } ahair. See the memoir of Dr. George Johnston on this spe- cies in the Magazine of Natural History, vol. ix. p. 359.] [This animal, which is found in slowly-running and stagnant waters in the summer, is commonly mistaken for the species of Filaria, the proper habitat of which is the intestines of Beetles and other insects. ‘The head of Gordius is obtusely conical, with a simple circular terminal pore for a mouth, from which a sort of membrane can be forced by pressure. The tail is bifid ; the processes short, equal, and obtuse; the latter has often been mistaken for the mouth. Thus Dr. Turton describes the mouth as “small, horizontal, with equal obtuse jaws.” Dr. Johnston states, that having cut off portions of the anterior extremity and tail, the detached parts soon lost every sign of life ; it has, however, been asserted, that each part would grow into a perfect animal. } Fig. 209.—Gordius aquaticus. AO] INTRODUCTION TO THRE ARTICULATED ANIMALS WITH ARTICULATED LEGS.* BY Mie Peg Ac MACE BS tobi Br OvERWHELMED by the variety of his occupations, and yielding too easily to the im- pulse of friendship, M. Cuvier has confided to me the portion of this work which treats upon insects. These animals were the objects of his earliest studies in zoology, and hence origin- ated his friendship with Fabricius, one of the most celebrated disciples of Linnzeus, who has repeatedly, in his works, shown evidences of his particular esteem. Various inte- resting observations upon some of these animals, published in the Journal d’ Histoire Naturelle, formed the prelude to his works upon natural history. Entomology, like the other branches of zoology, has derived the greatest advantages from his anatomical re- searches, and the happy modifications which he has thence made in the groundwork of our classification. The external structure of insects has been better understood; and this branch of the science has no longer been neglected, as it had previously been. His Tableau Elémentaire de 0 Histoire Naturelle, and Legons d’ Anatomie Comparée, have pointed out the path to the natural method. The public will therefore have cause to regret that his numerous pursuits would not permit him to undertake this portion of his treatise upon animals. In undertaking this work, my object has been to unite, in as narrow limits as possible, the most striking facts in the history of insects ; to arrange these animals with precision and clearness, in a natural series; to sketch their physiognomy ; to trace, in as few words as possible, their distinguishing features, adopting a plan which shall be in rela- tion to the progressive advance of the science and of the student; to notice the bene- ficial and obnoxious species,—indicating, at the same time, the best sources where he may attain a knowledge of the other species; to reduce the science to the engaging simplicity which it exhibited in the days of Linneus, Geoffroy, and the earlier works of Fabricius, and yet to present it as it now appears, enriched but not overcharged with recent observations and researches ;—in a word, to make it conformable to the work of Cuvier, This author, in his Tableau Elémentaire de l Histoire Naturelle des Animaux, did not limit the extent of the class of insects, as restricted by Linnzeus, but introduced neces- * (These introductory observations appeared in both editions of the _ lished in the intervening period. In like manner, the internal anatomy Regne Animal, the object of Latreille being herein tu set forth the | of these animals had been greatly studied,—thereby, in many instances, general principles upon which his arrangement of the Linnean insects | affording more certain proofs of the solidity of many of the groups pre- was founded. Inthe second edition, the same general classification | viously proposed, and of whose internal structure it therefore becaine was adopted, but considerable alterations were made in the arrange- | necessary to add the details to the generally external character pre- ment of the secondary and tertiary groups, such as families, genera, | viously given; so thut this second edition ought more strictly to be &c., it having been impossible to bring the work down to the then | regarded as an entirely new work.] present state of the science, without modifying the former arrange- *,* Throughout the Articulated portion of the present edition, the ment, and making great additions; so that two volumes were requisite | original passages are enclosed in editorial parentheses, thus [ if instead of one, to give a summary of the multitudinous genera pub- DD 402 INTRODUCTION TO THE sary modifications, which have served as the basis of other subsequent classifications. He at first characterized insects from other invertebrated animals, by more rigorous characters than had been before employed,—namely, a knotted or ganglionated nervous chord, extending down the body, and articulated limbs. Linnzus terminated his class of insects with those which are destitute of wings, although some of them—as the crabs and spiders—are, in respect to their organic systems, the most perfectly organized (les plus parfaits) of the class, and consequently the nearest to the molluscous animals. This arrangement is therefore opposed to the natural system; and M. Cuvier, by placing the Crustacea at the head of the class, succeeded by the other apterous insects, has rectified the method in a point where the series was in opposition to the scale formed by nature. In his Lecons d’ Anatomie Comparée, the class of insects, after the removal of the Crustacea, was divided into nine orders, founded upon nature, or the functions of their mouth-organs, and the variations in their wings, thus uniting the principles of the Linnean and Fabrician arrangements. [lst. Those with maxille, five orders: Gnath- aptera (including the majority of the Linnzan Aptera, after the removal of the Crustacea), Neuroptera, Hymenoptera, Coleoptera, and Orthoptera; and, 2nd, those without max- ille, four orders: Hemiptera, Lepidoptera, Diptera, and Aptera.] The groups esta- blished by Cuvier in his Gnathapterous order are nearly identical with those which I proposed in a Memoir presented to the Société Philomatique, in April, 1795, and in my Précis des Caracteres Génériques des Insectes, in which I divided the Linnzan Aptera into seven orders :—1. Suctoria; 2. Thysanura; 3. Parasita; 4. Acephala (the Arach- nides palpistes of Lamarck); 5. Entomostraca; 6. Crustacea; 7. Myriapoda. Lamarck’s arrangement of the Linnzan Aptera appears, however, to make the nearest approach to a natural system; and we have adopted it, with certain modifications, which we will now explain. With him, I divide the Linnean insects into three classes :— Crustacea, ARACHNIDA, and Insecta; but I do not employ the characters derived from metamorphosis ;—these, although natural, and already employed by De Geer, not being classical (classique), presupposing the observation of the animal in its different states, which has been so much neglected. I have not, however, entirely neglected these characters; and, indeed, a Memoir which I have prepared upon the metamor- phoses of insects, not yet published, has been resorted to in the general observations upon the different groups. In the class Crustacea, I have established five apparently natural orders, founded upon the situation and form of the branchie, the manner in which the head is articu- lated with the thorax, and the mouth-organs; and I have terminated this class, like Lamarck, with the Branchiopoda, which are a kind of Crustaceous Arachnida. In the class AracunipA, I only comprehend the Arachnides palpistes of Lamarck, and which thus constitute a group well characterized, both internally [from the struc- ture of their respiratory apparatus] and externally, from their being destitute of antenne, and have ordinarily four pairs of feet. I divide this class into two orders: namely, the Pulmonaria and Trachearia. The class of Insxcra is characterized in a very simple manner by the system of res- piration consisting of two air tubes running along the sides of the body, furnished at intervals with centres of ramifications, corresponding with the [external] spiracles, and by the possession of swo antenne. The primary groups of insects are founded upon ARTICULATED ANIMALS. 403 the following considerations :—1st, Wingless insects, with incomplete metamorphoses, or which do not undergo any change, comprising the first three orders; 2ndly, Wingless insects, undergoing complete metamorphoses, comprising the fourth order; and, 8rdly, Insects with wings, which they acquire by metamorphosis, either of an incomplete or perfect kind, containing the last eight orders. The first of these primary groups cor- responds with Lamarck’s Arachnides antennistes ; the second, consisting of the single genus Pulex [or the flea], appears, in some respects, to be related by means of the genus Hippobosca [or forest flies], with the order Diptera, although, in other respects, and in its metamorphoses, it is removed from the genus last named. It is, moreover, often difficult to distinguish these natural enchainments; and often, even when discovered, we are compelled to sacrifice these relations to the precision and facility of our [arti- ficial] methods. To the before known orders of insects I have added that of Strepsiptera (Kirby), but under the name of Rhipiptera,—the former appearing [but erroneously] to me to be founded upon an incorrect supposition. Perhaps, indeed, this order might be sup- pressed, and united with the Diptera, as Lamarck had suggested. For the reasons assigned in my Considérations Générales, &c., p. 46, and which I might support by other proofs, I have attached more weight to the characters derived from the organs of locomotion, and the general construction of the body, than to the modifications of the mouth-organs, at least when their structure is referable to the same type. Hence I do not divide the class first into gnawing and sucking insects, but into those with wings, or wing-cases, &c., nearly similar to the series of the Linnzan orders, using, in a secondary sense, the characters derived from the mouth-organs, which had been placed in the foremost rank by Fabricius, Cuvier, Lamarck, Clairville, and Dumeril, whose arrangements consequently differ from mine. I have followed Cuvier in reducing the number of families proposed in my former works, and in converting into subgenera the groups separated from the Linnean genera, although their characters appear to be sufficiently distinct. Such was also the plan of Gmelin, which is simple and advantageous, by bringing the subject more within the capacity of the student. All my groups are founded upon the comparative investigation of all the parts of the animals which I desire to make known, and upon the observation of their habits. It is from being too exclusive in their considerations, that the majority of naturalists entirely lose sight of the natural system (/’ordre naturel). To the facts recorded by Réaumur, Roesel, De Geer, Bonnet, the Hubers, &c., upon the instincts of insects, I have added many collected by myself; while the works of Cuvier, L. Dufour, M. Serres, Strauss, Audouin, and Milne Edwards, have furnished me with anatomical observations. As I have been able to describe but a very small number of insects, I have selected the commonest and most interesting species. [Such is a condensed abstract of the introductory observations of Latreille, from which it will be seen that the period of ten years, which had elapsed between the pub- lication of the first and second editions of this work, had rendered it necessary to double the space assigned to the Linnean Insecta, which, in the second edition, occupied up- wards of 1100 pages. The latter was published in 1829; and if we contrast the ten years which have elapsed since that period with the ten preceding, we shall be com- DD2 404 INTRODUCTION TO THE pelled to admit that Entomology has made far more rapid strides in these days than heretofore. The establishment of Entomological Sccieties in France and England has called forth the exertions of many students, who, in every branch of the science, have added greatly to our knowledge of these tribes of animals; but it has been especially with reference to the description of new genera and species that the greatest strides have been made. ‘To attempt, within the very limited space devoted in this edition to the Invertebrated Animals, to give even a list of all the new genera established since 1829, would be useless; and this portion of the work must therefore necessarily be treated in a plan somewhat at variance with that of the vertebrated portion. As we cannot, therefore, give the genera, subgenera, sections, subsections, and other inferior groups, which, in the majority of instances, rest upon isolated structural characters, often of trivial nature (such as the number of joints in the antenne, the number of cells or spaces formed by the veins of the wings, &c.), I shall confine myself more espe- cially to those natural groups which Latreille, in his other works, regarded as “ natural families,’—groups equivalent in general with the Linnean genera, to which but few additions of importance have been made, and of which the knowledge will afford a good and sufficiently general view of Entomology,—noticing, however, their sectional distri- bution, and the more remarkable of the groups now termed genera. It is in the first place, however, necessary to observe, that the limits of the sub-kingdom Articulata, and its primary divisions, have recently formed the subjects of much discus- sion. The researches of Drs. Nordmann, V. Thompson, and Burmeister have clearly proved, not only that the Cirrhipedes, placed by Cuvier amongst the Mollusca, are, in their earlier stages, active Entomostraca; but also that the Lernzze, placed by Cuvier amongst the intestinal worms, are similarly active, and furnished with articulated legs in their early state. The relation of the Annelides with some of the wingless insects has also been strenuously maintained by some writers, who have deemed the internal organisms of higher importance than the circumstance of the limbs being articulated. With respect to the primary divisions, or classes, into which the jointed-legged Articulata (or the Condylopa of Latreille) are formed, it is to be observed that Latreille himself, in his Cours d’ Entomologie, published subsequently to the second edition of this work, has modified his views herein set forth, in the following manner :— ConpyLopa—C(lnsecta, Linn.) 1. Aprropopa.—With more than six feet; destitute of wings. Class 1. Crustacea. 2. Arachnides. 3. Myriapoda. 2. Hexaropa.—Including the single Class 4. Insecta.* Here we find the Myriapoda, which Latreille had in this work united with the true insects, raised to the rank of a class, whilst the orders Thysanura and Anoplura (Para- sita, Latr.) still remained with the fourth class. Mr. M‘Leay, however, has united these two orders with the Myriapoda, forming thus indicate the Mammalia. That the Myriapoda are analogous to the reptiles is sufficiently evident by comparing a Scolopendra with nature, as some of our recent English naturalists (M‘Leay, Swainson), | the skeleton of a Snake, or an Iulus with a perfect one (whence we may notice that these four groups seem to represent the four pri- | Latreille named the latter Anguiformes) ; whilst the true insects, fur- mary groups of vertebrated animals. The Crustacea are aquatic, and, | nished with wings, at once represent the only other winged ciass— as such, are analogous to fishes. Yhe Arachnida are terrestrial, and | tiat of birds.] * (Without attaching so much weight to considerations resting solely upon analogical resemblances, too often of a very fanciful ARTICULATED ANIMALS. 405 them, with certain worms, into a class, for which he adopted Leach’s name, Ameta- bola (changeless), in order to distinguish them from the true insects, which undergo transformations. This author retained the classes Crustacea and Arachnida, but di- vided the insects, from the structure of their mouth-organs, into those with mandibles and those with a suctorial mouth,—characters which we have seen had been employed in the arrangement of the orders of insects inter se. Other arrangements have been proposed by Kirby and Spence, Burmeister, &c., to which I can but refer.—I shall, therefore, only add that it appears to me most natural to confine the Ametabola to the Myriapoda, Thysanura, and Anoplura; to unite the winged insects into one class, named Ptilota, after Aristotle ; and to retain the Crustacea and Arachnida in the limits here detailed —Hntomol. Text-Book, p. 79; and Introd. to Modern Classific. of Insects, vol. i. p. 4.] ARTICULATED ANIMALS, FURNISHED WITH ARTICULATED FEET,* IN GENERAL. CRUSTACEA, ARACHNIDA, AND INSECTA. These three} classes, united together by Linnzus under the common name of Insects, but which I name Condylopa, are distinguished by their articulated feet, of which they have at least six. Each joint [of the legs] is tubular, and contains the muscles of the following articulation, which always moves by ginglymus,—that is, in but one direc- tion. The first joint which attaches the limb to the body, and which is generally com- posed of two§ pieces, is named the coxa, or hip, [the second of these pieces, when present, is termed the trochanter]; the next piece, which is ordinarily in a position nearly horizontal, is the femur, or thigh; the third is generally vertical, and is named the tibia, or shank; and the terminal part of the leg, or properly the foot, is composed of a series of small joints, which touch the ground, and which are collectively named the tarsus. The hardness of the calcareous or horny || envelope of the majority of these animals is owing to that of the excretion which is interposed between the dermis and epidermis, or what is termed in Man the mucous tissue. It is also in this excretion that are lodged the often brilliant and varying colours with which these animals are sometimes adorned. These creatures are always furnished with eyes. ‘These are of two kinds :—Ist, The simple eyes, named ocelli, or stemmata, ordinarily resembling a minute lens, and of which there are generally three, arranged in a triangle on the crown of the head; and, 2ndly, the facetted or composite eyes, of which the surface is divided into an infinite number of * The series of [external] articulations of which the body is com- posed has been compared to a skeleton, or vertebral column ; but this is erroneous, because the supposed vertebrx are ouly hardened por- tions of the skin, connected by more slender membranous intervening portions. The researches of Strauss especially prove this, in vpposi- tion to Robineau Desvoidy, and others. The power of exuviation especially distinguishes these from other Invertebrata. + Dr. Leach formed the Myriapoda into a distinct class. The tra- chean Arachnida might also, froin their anatomical characters, consti- tute another, but they are too nearly allied to the pulmonary Arach- nida to allow this separation. | t Hexapods. Those with more than six feet are the Apiropoda of Savigny, or my Hyperhexapods. § In many Crastacea, the second piece of the coxa appears to form part of the femur, and the tibiw (as also in the Arachnida) are two- jointed. || According to M. Odier, the chief substance of which this integu- | ment is composed is of a peculiar nature, which he names chitine. Phosphate of lime forms the chief port of the salts of the teguments of insects, whilst the carapax of the erals abounds in carbonate of | lime. 406 ARTICULATED ANIMALS. minute [hexagonal] lenses or facets, to each of which there is a corresponding filament of the optic nerve. These two kinds of eyes may exist in conjunction or separately, vary- ing in the genera; and we know not whether their action, when united in the same individual, be essentially different. The sense of sight, however, must in all instances be effected in a manner quite unlike that of the Vertebrata. (Consult the Memoir of Serres on the Eyes of Insects, Montpelier, 1815, 1 vol. 8vo; and the Observations of Blainville on the Eyes of Crustacea, in Bull. Soc. Philomat.) [also the memoir of J. Miiller, conscisely abstracted in the “‘ Insect Miscellanies.”’] Other organs, which we here find, for the first time, amongst the Crustacea and Insecta*, and which are named antenne, are articulated filaments, varied in the greatest degree as to their form, even in the sexes of the same species, arising from the head, and appearing eminently endued with a delicate sense of touch, and perhaps, also, with some other kind of sensation of which we have no idea, but which has reference to the state of the atmosphere. These animals also enjoy the senses of smell and hearing. Some authors place the seat of the first of these senses in the antennzet; others, as M. Dumeril, in the These opinions, however, are not founded upon positive and conclusive facts. As to the sense of hearing, the Decapod Crustacea, and certain Orthoptera, alone possess a visible ear. The mouth of these animals presents a great analogy [or general uniformity], which orifices of the breathing pores; and others, as M. de Serres, in the palpi. also extends, according to Savignyt, in a relative manner, even to those species which subsist by suction. Those which gnaw their food [Mandibulata, Clairville] by means of jaws fit for trituration, have the parts of the mouth arranged in pairs laterally, and placed one before [or over] the other. The anterior pair are specially named mandibles, [the succeeding pair or pairs being termed maxille, or hind jaws]; the pieces which cover the jaws before and behind are the lips§, that in front being called the labrum, [and that behind being the labium]. The palpi are articulated filaments attached to the hind jaws and the hind or lower lip, and appear to assist the animal in recognizing its food. The form of these different organs determine [or, more properly speaking, indicate] the kind of nourishment with as much precision as the dental system of Mammalia. Within the lower lip||, the tongue (ligula) [or rather lingua] is ordinarily attached. Sometimes, as in the bees, and many other Hymenoptera, it is prolonged considerably, as well as the maxille, forming a kind of proboscis (promuscis), with the pharynx at its base often covered by a kind of secondary lip (sous-labre ; epipharynz, Savigny), and which appears to me to exist, in many beetles, in the form * And even in the Arachnida, but under modified forms, and with | galea by Fabricius, in Orthopterous insects. In these insects, and in modified functions. + With reference, at least, to Insecta, and when they terminate in a more or less complicated mass, or are clothed with a great quantity of hairs. According to M. Desvoidy, the internal antenne of the Decapod Crustacea are organs of smell (Bull. Sci. Nat. 1827), but he cites no direet proof; and, indeed, in the most carnivorous crabs (Gecarcinus, &c.), where the organ of smell ought to be most fully developed, the very reverse takes place, [the inner antenne being very small,} t Mémoires sur les Animaur sans Vertebres. The original idea [of this uniformity] was first announced by me (but without develope- ment) in my Histoire Générale des Insectes. § I here more particularly allude tu the Hexapod insects. | The labium is protected in front by a corneous piece, formed by a cutaneous elongation, and articulated at its base with a part of the under side of the head, named the mentum. Its two palpi are termed labial palpi. The maxillary palpi are two or four in number, in the lat- ter case being named external and internal, the internal palpi being a modification of the outer lobe of the maxilla, and which is named the Libellule, there is a soft vesiculose body in the middle of the mouth, distinct from the lower lip, and which, compared with the Crustacea, appears to be the true tongue (Labium, Fabr.) This organ is probably represented in many Coleoptera by the lateral divi- sions of the labium, which are termed paraglosse. The membranous terminal part of the lower lip, extending between the palpi in the Orthoptera and Libellulz, is quite distinct from this central tongue, although nearly all entomologists have termed this terminal extremity of the lip by the name of languette. It is, nevertheless, true, that this central tongue is often closely soldered to the [inner surfece of] the lower lip. [The composition of the lower lip is very complicated, and variable in different groups. As a whole, it is best to retain for it the name of lubium. Its corneous basal piece is the mentum. The following piece is generally called the labium, having the labial palpi arising at its base; but the German authors term this terminal piece ligula. The internal piece is the lingua. Latreille refers to the larve of the Dyticida, as affording a clear notion of the typical struc ture of the labium; but in these larve, the labium is almost obsolete. The perfect Silphe, or Staphylini, afford much better instances. ]} ARTICULATED ANIMALS. 407 of a membranous piece beneath the labrum, which has the same reference to it as the mentum has to the labium. In Hemiptera and Diptera the mandibles and maxille are represented by scaly pieces, in the form of sete or lancets, received in a tubular elongated sheath, which is either cylindrical and articulated, or elbowed, and terminated by fleshy lip-like pieces. In these insects the mouth becomes a real sucker. In other suctorial insects (Lepidoptera) the maxillz alone are elongated, conjointly forming a tubular and very slender instru- ment like a long tongue, spirally folded up at rest, the other parts of the mouth being but very slightly developed, [except the labial palpi]. Sometimes, as in many Crustacea, the fore-legs approach the maxille, taking their form and exercising their functions, so that the maxille may in such cases be said to be multiplied, and some- times it may even occur that the real maxille are so much reduced in size that the maxillary feet or foot-jaws (pieds-machoires) entirely replace them. But, whatever may be the modifications of these parts, they may always be recognized, and these variations reduced to a primitive or general type. [This kind of reasoning may appear fanciful to persons who have not studied the comparative anatomy of these lower animals, but there are so many instances in which feet are transformed into jaws, and jaws into feet, that it is impossible not to arrive at the conclusion that these organs are but modifications of each other. For instance, in the crabs there are three pairs of foot-jaws and five pairs of legs, whilst in the jumping shrimps (Amphipoda) there is only one pair of foot-jaws, the number of legs being increased to seven pairs by the addition of the two outer pair of foot-jaws. The genera Sergestes, Sicyonia, and Acetes amongst the Shrimps still more clearly prove this, for here the typical number of legs is five pairs, but the same kind of modifications occur. In the winged insects it is quite sufficient to examine the lower lip of a grasshopper, cockroach, or white ant, to perceive at once that it consists of a pair of small maxille soldered together, the ligula (or labium, as it is restrictedly called by some authors) consisting of two inner lobes, and two galez, with two labial palpi: if, therefore, we consider the internal lobe of the maxillz as a palpus, the labium in these insects will possess four palpi and two inner lobes. If we adopt this principle, we must suppose that as each leg-bearing segment is furnished with a pair of limbs, the head is a compound segment, furnished with several pairs of limbs, being the analogues of legs, and such is the view entertained by some of the most celebrated of modern entomologists. The same principle Latreille considers to be equally applicable to the antenne, or at least to the inner pair of these organs in the Crustacea, and ‘hence the Arachnida and Myriapoda are not, in this respect, anomalous exceptions to the principle. | THE FIRST CLASS OF ARTICULATED ANIMALS WITH * ARTICULATED LEGS. CRUSTACEA. The Crustacea are articulated animals, provided with articulated legs, respiring by branchiz (a kind of gills), covered in some species by the sides of the carapax or shell, and external in others ; but which are not inclosed in particular cavities of the body, recelving the air by means of orifices in the surface of the skin. Their circulation is 408 ARTICULATED ANIMALS. double, and analogous to that of the Mollusca. The blood is transmitted from the heart, situated near the back, to the different parts of the body, where it is conveyed to the branchiz, and thence back to the heart. These branchie are situated either at the base of the legs or upon the legs themselves, or upon the subabdominal ap- pendages, forming either pyramidal masses, composed of layers of fine plates or clothed with sete, or consisting of simple plates in tufts, even in some appearing to consist only of hairs. The nervous system of the Crustacea (especially investigated by Cuvier, Audouin, and Milne Edwards), exhibits two very different appearances, constituting the two extremes of the modifications it presents in this class. Sometimes, as in the leaping shrimps (Yalitrus), it is composed of two nervous chords, with knots or ganglions at equal distances along the whole length of the body, and sometimes, as in the Crab (Maia Squinado), it consists of only two nervous masses, of unequal size, one placed in the head and the other in the thorax. Other Crustacea (Cymothoa, Phyllosoma, Palinvrus, Palemon, and Astacus), exhibit intermediate formations, showing the gradual modifications.* The Crustacea are destitute of wings, provided with two facetted eyes, but rarely with simple eyes, and generally with four antenne. They have in general (the Peecilopoda excepted) three pairs of maxille (the upper pair or true mandibles included), the same number of foot-jaws, the outer pairs of which become, in many species, real feet; and ten legs, all of which are terminated by a single hook. When the two outer pairs of foot-jaws perform the office of feet, the number of legs is [increased to} fourteen. The mouth consists, as in insects, of an upper lip, a tongue, but no true lower lip comparable with that of insects, the external pair of foot-jaws [the third pair, or, where the two outer pairs become legs, the first pair] closing the mouth and acting instead of a lip, [thus proving what has been suggested above relative to the nature of the labium in insects]. Their envelope is generally solid, and more or less calcareous. coats several times, generally retaining their primitive form} and their natural activity. They are in general carnivorous, aquatic, and their life extends through several years. They do not become adults until after a series of moultings. With the exception of a small number in which these moultings somewhat modify the primitive form, and augment the number of locomotive organs, these animals are at their birth (size. excepted) such as they will remain throughout their life. The situation and the form of the branchiz, the manner in which the head is articulated with the trunk or thorax, the moveable or fixed structure of the eyes}, the organs of mastication, and the tegumentary system, form the bases of our distribution, and give rise to the following orders in the class, and which are confirmed by the observations hitherto made upon the nervous system. They change their * (The modifications in the structure of the nervous system of the larva, pupa, and imag of the same insect, fully confirm this, that of the larva resembling that of the Talitrus, whilst that of the imago is nore analogous to that of the Crab. If we regard the larva as in a state of immaturity or imperfection, we should be led to consider the Crab as far higher in the chain of nature than the Talitrus, and such is the station generally assigned to it, without reference to its nervous system. ] + [This statement has been opposed by Dr. J. V. Thompson, in his Zoological Researches and other more recent articles, this writer asserting that the Crustacea undergo a series of transformations as striking as those of the true insects; the anomalous animals long known under the generic name of Zoea, and which have long perplexed Crustaceologists (for want of a perfect investigation of their struc- ture), being affirmed by him to be the young of the Crabs and other Decapoda. In some cases, however, where. a minute analysis of the eggs of different species has been made, a contrary result has been obtained, Rathke having dissected the egys and watched the gradual developement of the embryo of the crayfish, and I having dissected the eggs of the land crab of the West Indies, the young in both in- stances (and in others subsequently observed by Rathke) resembling the parents in general appearance. ] t Whence Lamarck divided the Crustacea into the Pediocles (or eyes on footstalks) and Sessiliocles (or sessile eyes). Leach changed these names (applying them only to the Malacostraca) into Podopthalma and Edriopthalma. Gronovius first employed this character. CRUSTACEA. 409 We divide the class into two sections, Malacostraca and Entomostraca.* The Matacosrraca have the envelope ordinarily very solid, of a calcareous nature, and ten or fourteen} legs, hooked at the tip; the mouth placed in the ordinary situation, and composed of a labrum, a lingua, a tongue, two mandibles, often palpi- gerous{, two pairs of maxillz covered by the foot-jaws. Ina great number each of the eyes is supported upon a moveable footstalk, articulated [at its base], and the branchiz are hidden beneath the lateral margins of the carapax or shell; in others, how- ever, they are attached beneath the post-abdomen. The Malacostraca consist of five orders :—1. Decapoda ; 2. Stomapoda ; 3. Lemodipoda; 4. Amphipoda; 5. Isopoda. The first four of these orders were included in the Linnean genus Cancer, and the last in his genus Oniscus. The Enromosrraca, or shell insects (énsectes & coquille) of Muller, are composed of the genus Monoculus of Linnzus. ‘The envelope is corneous, very slender, and the body in the majority is covered by a shell, composed of two pieces, not unlike that of the bivalve Mollusca. The eyes are ordinarily sessile, and often there is but one The legs, of which the number varies, are, in the majority, Some of them are most of. these organs. fitted only for swimming, without any terminal hook. nearly allied to the preceding groups by having the mouth anteriorly situated, and composed of a labrum, two mandibles (rarely palpigerous), a tongue, and at most two pair of maxillz, the outer ones not being covered by foot-jaws. In the others, which appear to approach the Arachnida in many respects, the organs of mastication some- times merely consist of the cox of the legs advanced and lobe-like, armed with numerous small spines, and surrounding a large central pharynx: whilst in others they form a small siphon or beak, used as a sucker, as in many Arachnida and Insects ; and even sometimes they are not, or scarcely, visible on the exterior of the body, the siphon itself being either internal, or the action of suction being performed by a kind of sucking cup (ventouse). Hence the Entomostraca are either dentate or edentate. The dentate species com- pose one order, Branchiopoda, and the edentate that of Pcecilopoda§, which, in the first edition of this book, I had considered as a section of the preceding order. favour of sections characterizea by the mouth organs) into five orders, Lophyropoda, Ostrapoda, Phyllopoda, Xiphosura, and Siphonostoma, and had characterized several sub-orders which Edwards subsequently * Jurine divided the class into two sections, founded upon the pre- sence or want of jaws,in his Memoir on Argulus. [Latreille also adopted this as a primary character in his Cours d’Entomologic.} + The four anterior, when there are fourteen, are formed of the four posterior foot-jaws. In the Decapoda the six foot-jaws are ap- plied to the mouth, and serve as under jaws. t [This peculiarity never occurs in the true insects, and serves to prove that the mandibles are but modified maxillw, or rather, to speak more theoretically, the inferior appendages of one of the articulations of the body.] §In my Familles Nuturelles du Regne Animal, the Entomostraca were divided into four orders, namely, Lophyropoda, Phyllopoda, Xiphosura, and Siphonostoma. [The Entomostracous Crustacea, like the Invertebrata, having been proved by recent investigators to con- sist of several tribes of animals much more strongly modified in their Structure than the Malacostraca, it has become necessary to establish a greater number of orders and primary groups for their reception than were proposed in this work, and Latreille himself became aware of the necessity for such a step, having considerably altered the arrangement of the class in his Cours d’Entomologie subsequently published. Milne Edwards, Burmeister, and De Haan have especially investigated these animals during the last ten years, and it will be serviceable to give a short abstract of the arrangements which they have proposed, especially as the works of the two last-named authors are in the hands of so few naturalists, that even Milne Edwards has not mentioned them in his Review of Crustaceology (Suites de Bujfon). Latreille himself, in his Cours d’Entomologie, had cut up the Ento- mostraca (which he had sunk as a primary section of the class in adopted in the following sketch (Suites de Buffon, Crust. I. p. 236, modified from that published in the dnnales des Sci. Nat., March, 1830). Subclass J.—Crustacea with maxille. Legion 1. Podopthalma, Order 1. Decapoda. 2. Stomapoda. Legion 2. Edriopthalma. Order 3. Amphipoda. Order 5. Leemipoda. Legion 3. Entomustraca. Order 8. Copepoda (Cyclops) 9. Cladocera(Daphnia,&c.) Order 4. Isopoda Legion 2. Branchiopoda. Order 6. Ostrapoda(Cythere). 7. Phyllopoda. Legion 4, Trilobita, Subclass [1].—Crustacea with a sucker. Legion 1. Ambulatory Parasites. Order 10, Araneiformes (Pycnogonum). Legion 2. Swimniing Parasites, Order 11. Siphonostoma. 12. Lerner. Subclass I11.—Crustacea Xiphosura. Order 13. Xiphosura. Burmeister, in his Grundriss fur Naturgeschichte, Zoologischer Handatlas, and Memoir on the Cirripedes, has divided the class into three orders only :— 410 CRUSTACEA. The singular fossils called Trilobites, of which M. Brongniart has furnished an excellent monograph, being considered by him and many other naturalists as crus- taceous animals allied to the Entomostraca, we have introduced them concisely at the end of that section. FIRST GENERAL DIVISION. CRUSTACEA MALACOSTRACA,— Which are divisible into those which have the eyes placed on a moveable foot-stalk, and those which have them sessile and fixed. Those Matacosrraca with the eyes placed on a moveable foot-stalk, articulated [at the base, Poporruatma, Leach], composing the orders Decapoda and Stomapoda, have many characters in common. A large shield, sometimes divided into two parts, and termed the shell or carapax, covers a large portion of the front of the body. They have four antennz, the exterior pair being longest and simple, whilst the intermediate pair is shorter, and divided at the tip into two branches in the crabs, and into three in many of the Macrura; two mandibles, each with a three-jointed palpus near the base, a bilobed tongue, two pairs of maxille, three pairs of foot-jaws, the two outer pairs being in some [Squilla] transformed into claws, and ten or fourteen (in those species which have the four outer foot-jaws leg-shaped) legs. In the majority the branchiz, of which there are seven pairs, are hidden beneath the lateral margins of the carapax, the two anterior pairs being fixed at the base of the two exterior pairs of foot-jaws, and the others at the base of the true legs. In the other species [Squilla, &c.] they form brushes attached to the five pairs of sub-abdominal swimming legs. The under side of this post-abdomen is likewise furnished in the others with four or five pairs of bifid appendages. THE FIRST ORDER OF CRUSTACEA. DECAPODA (TEN-FOOTED). The head is compactly soldered to the thorax, and covered, as well as that part of the body, by a large and continuous shell or carapax, generally exhibiting on its surface various impressed Ines, dividing it into regions corresponding with the imternal organs, and which have been ingeniously named by M. Desmarest. The circulatory system differs in some respects from that of the other Crustacea; the blood before reaching the branchix to be oxygenated passing through two great reservoirs, one on each side, above the legs, analogous to the lateral hearts of the Cephalopods, according to Milne Edwards, Audouin, and Cuvier. divisions, Gammarina, Typhina, Loemodipoda, Epicarida, Cymo- thoade, Spheromatoda, Asellina, Idotoda, and Oniscoda. 1. Aspidostraca, divided into five sub-orders. 1. Parasita, including the Penellina, Lernwoda, Ergasilina, Caligina, and Argulina. 2. Lophyropoda, including the Ostracoda, Cladocera, and Cyclopida. 3. Phyllopoda, including the Gymnota (Branchipus), and As- pidophora (Apus). 4. Cirripedia, including the Lepadea and Balauoda. 5. Peecilopoda, including only Xiphosura. 2. Thoracostraca (Podopthalma, Leach), divided into two suborders, Decapoda and Stomapoda. 3. Arthrostraca (Edriopthulma, Leach), divided into nine minor De Haan, in his magnificent work npon the Crustacea of Japan, adopting the quinarian circular system of M’'Leay, divides the class into five orders,—Decapoda, Stomapoda, Tetradecapoda(Edriopthalma, Leach), Lophyropoda, and Phyllopoda, M. Duverney has, within the last few months, submitted a Memoir to the Académie des Sciences at Paris, proposing a new classification of the Crustacea according to the organs of respiration, dividing the class into three principal groups, Nudibranchie, Cryptobranchiz, and Lamellibranchie ; but the adop- tion of this, like any other single character, has had the effect of | breaking the most natural relations.) mh, | ae iy uh Bek) oe ja ‘ if \ BEETLES » ———— — v~ a Awacephala Cnrvicornis - Drnastes Hardwiclai. Circeelhwin Lyeeus . ~ } Whoo qe Gilding DECAPODA. 411 The lateral edges of the carapax are bent downwards in order to cover and defend the branchiz, an aperture being left in front of the shell for the passage of the water.* The branchiz are situated at the base of the four exterior foot-jaws and of the legs, the four anterior being smallest. The six foot-jaws are of a different form, applied to the mouth and divided into two branches, the exterior resembling a small antenna, furnished at the tip with a short multiarticulate piece [and the interior composed of several joints, the two basal being greatly dilated in the crabs], the base being also furnished with a long pilose tendinous branch. The anterior pair of legs, and sometimes the two or four following, form large claws, the penultimate joint being dilated, with its lower extremity prolonged into a finger opposed to the terminal joints or true tragus, which is moveable, and is named the pollex, whilst the other is fixed, and is named the index. In Squilla the last joint is very short, and then the penultimate jomt folds back upon the preceding. The antepenultimate joint is the carpus. The respective proportions and situation of their limbs is such that these creatures are able to walk sideways or backwards [crab-like]. The majority of the viscera are inclosed in the thorax, which thus represents the thorax and greater part of the abdomen of the imsects; the terminal articulated parts of the body immediately following those segments to which the five pairs of true legs are attached, con- stitute the part which I name the post-abdomen. The stomach is armed within with five bony and dentated pieces which serve to triturate the food. At the time of moulting, two calcareous bodies, round on one side and flat on the other, are found in the stomach, which are ordinarily called crabs-eyes, and which, as they disappear after moulting, have been considered to furnish the material for the renewal of the carapax. The growth of these animals is slow, and they live for a long time. It is amongst these animals that we find the largest species of annulosa, as well as the most useful as articles of food ; their flesh is, however, hard of digestion. The body of some species of Palinurus is more than a foot in length. Their claws, as is well known, are extremely powerful. They ordinarily reside in the water, but are not immediately killed by being removed into the air : indeed, some species pass a considerable part of their existence out of the water, which they only seek in order to deposit their eggs init. They are, nevertheless, compelled to reside in damp situations and burrows. They are naturally voracious and. carnivorous : some species, indeed, are said to frequent the cemeteries in order to feed upon dead bodies. Their limbs are renewed [when injured] with great quickness, but it is necessary that the fracture should have been made at the junction of the joints: they, however, have the instinct to effect this if the wound has been of a different nature. When desirous to change their skins, they seek for some retired spot, where they may be at rest and secure from their enemies. The moult- ing then takes place, the body being at first soft and of a delicate flavour, [as in the case of the black crab of the West Indies, which is kept in cages expressly for the table]. The chemical analysis of the old shell proves that it is formed of carbonate of lime and phosphate of lime in different proporticns. By the action of the heat the epidermis assumes a bright red colour, the colouring principle being decomposed by the action of boiling water. The greater number of fossil Crustacea hitherto discovered belong to the order of Decapoda. Amongst the European fossil species, the most ancient approach nearest to the existing species found in tropical seas, while the more modern ones have a greater resemblance to the species now existing in our own climates. The fossil Crustacea of tropical regidns bear a greater re- lation to the existing species found in the same situations —a fact of considerable geological interest. [The order contains two families, or rather sub-orders, named, from the comparative size of the tail, Brachyura (short tailed) and Macroura or Macrura (long tailed.)+] * MM. Audouin and Milne Edwards have communicated to the | the blood during a considerable period]. It is on this account that Académie des Sciences some interesting observations upona peculiar | these crabs have the sides of the thorax more gibbose than ordinary. organ which exists in the Land Crabs, forming a kind of reservoir, + (M. Edwards proposed the establishment of a third sub-order under placed immediately above the branchiz, and capable of containing a | the name of Anomoura, forming a passage between the two other certain quantity of water [serving of course for the oxygenation of | groups, and composed of species belonging strictly to neither, which 4] CRUSTACEA. THE FIRST FAMILY* OF DECAPODA,— Decaropa Bracuyura (Kleistagnatha, Fabricius),— Has the tail (or post-abdomen) shorter than the thorax, without appendages or swimmerets at its extremity, and. in a state of rest folded beneath the breast, and lodged in a sternal cavity. Fig. 1.—Carcinus Menas (Common small Edible Crab), upper side and under side of the body, with the limbs truucated.—a, lateral antenna; 6, inter- mediate antenna; c, eye; d, outer foot jaw; e, f, &, , base of the five pairs of legs; A, tail; /, sternum. It is triangular in the males, but rounded and swollen in the females, and is furnished in the former with four or two appendages at the base [on the inside], whilst in the female it has four pair of double filaments employed in carrying the eggs, and which are analogous to the swimming sub-abdominal appendages of the Macrura. The antenne are small; the intermediate pair, generally lodged in a cavity beneath the fore-margin of the carapax, are terminated by two very short [articulated] filaments. The peduncles of the eyes are larger thanin the Macrura. The first pair of legs is terminated by a claw. The branchize are arranged ina single row in the form of pyramidal plates, composed of a great num- ber of minute leaflets spread one upon the other: the foot-jaws are ordinarily shorter and broader than in the Decapods, the outer pair forming a kind of labium. This family may be regarded as constituting the single genus CanceR,— Comprising the numerous species of crabs [and consisting of a portion only of the Linnean genus Cancer, divisible into seven. sections and a great number of minor divisions, regarded by recent authors as genera]. Of these the majority have the legs attached at the sides of the breast, and always ex- posed. The species thus characterized constitute the first five sections, Pinnipedes, Arcuata, Quadri- latera, Orbiculata, and Trigona.{ had long perplexed Crustaceologists ; and M‘Leay, in order to adopt | his quinarian system to these animals, has divided the Decapoda into five tribes, Tetragonostoma and Trigonostoma (composing the Brachyura), and Anomura, Sarobranchia, and Caridea (composing the Macroura).—ZJllustr. Annulos. of South Africa, No. 3.) * The groups thus indicated are founded upon a general survey of important anatomical characters, and generally correspond with the Linnean genera, and sometimes also to those of the earlier works of Fabricius. These families are here of greater extent than in my other writings ; but if we regard these as primary ordinal divisions, and the groups here called tribes as families, the arrangement will be found essertially identical. In the same manner the subgenera here indicated ought, ina more detailed arrangement, to be regarded as genera, and thus, although the Decapoda are here only divided into two genera, it wuuld be correct, in order to bring the system tu the level of our present knowledge, and in order to diminish the vast number of sub-genera, to convert the sections into tribes or genera, which might then be divided into subgenera, + The apparent number of segments is generally seven, varying occasionally in the sexes of the same species, in which case the females have the least number. Dr. Leach made great use of this character, but it appears to me to be too unimportant. t [Latreille regarded this arrangement of the Crabs here given as artificial in many respects, and he had modified it not only in his Familles Naturelles, in which the tribes here given were introduced but their relative position altered, but in his subsequent Cowrs @Entomologie he proposed ano her arrangement of the order, as follows :— Section 1. Homocheles, claws of equal size in both sexes. Division 1. All the feet attached to the body in the same line. Tribes.—1. Quadrilatera, 2. Arcuata, 3. Pinnipedes, 4. Christi- mani, 5. Cryptopoda, Division 2. With the two or four posterior legs dorsal. Tribe.—6. Notopoda, Section 2. Heterocheles, claws of the males larger than those of the females, Division 1, All the legs in the same line. Tribes.—7. Orbiculata, 8. Trigona. Division 2, Hind pairs of legs very small, and either dorsal or abortive. Tribe.—9. Hypopthalma. Pr. Leach, as above mentioned, adopted the number of abdominal segments, and was consequently led to distribute this order into still more numerous families. Milne Edwards, however, in his Hist. Nat. des Crustacés, now in course of publication, has, from anatomical considerations, considered it more natural to separate the Brachyura into only four great families. 1. The Oxyrhycha (Trigona, Latr. or the families Maiade, Lithodiadee, and Macropodiade of Leach), consisting of the sea spiders or thorn- backed crabs, the legs being long, the carapax narrowed into a point infront, the epistoma very large and nearly square. (Three tribes, Macropodiens, Maiens, and Parthenopiens). The Cyclometopa (or the Cancerida, Portunida, and Pilumnide of Leach): carapax very large, arched in front, narrowed behind, legs moderately long, epistoma very short, transverse. (Two tribes, 1. Canceriens, composed of three sub-tribes, Cryptopoda, Arcuata, and Quadrilatera; and, 2. Portuniens or Pinnipedes). The Catametopa (Ocypodiade, Leach), having the carapax quad- rilateral or ovoid, the front trausverse aud knotted, epistoma very Ge oS short. 4, The Oxystoma (Corystide and Leucosiade, Leach), with the shell orbicular and arched in front, which is not poin'ed, epistoma ob- solete. DECAPODA. 413 The first section, PINNIPEDES, have the hind pair of legs terminated by a flattened plate for swimming, and these species are accordingly met with at a distance from the coasts. Amongst these swimming or shuttle-crabs, as they are termed, are especially to be noticed the exotic species, composing the genus Matuta, Fab., having the carapax nearly circular, and armed on each side with a strong spine, and with the four posterior pairs of legs terminated by a dilated plate for swimming. The same is also thecase, but less strongly, in Leach’s genus Polybius, consisting of the single species, P. Henslowii, found on the Devon- shire coast. Amongst the species with only the last pair of legs dilated at the extremity into a plate for swim- ming, the genus Ovithyia, Fabr., consisting of a single Chinese species, is distinguished by the tail of the males being distinctly seven-jointed, whereas there are only five joints in the males of all the other Pinnipedes, the females alone having seven joints. Amongst these the genus Podopthalmus, Lamarck, has the carapax transverse, and armed at each side with a very long spine; the ocular peduncles are very long (P. spinosus, Latr., Isle of France) ; others which have the ocular peduncles short, and which are of the ordinary crab-like form, compose the genus Portunus, Fab., amongst which may be mentioned Cancer puter, Linn., and Cancer Meenas, Linn. (Carcinus Menas, Leach), two small species, commonly used as articles of food by the lower orders in London. The last- named species is exceedingly abundant; the terminal joint of the hind legs is much narrower than in the preced- ing groups, and thus this species forms a passage to— The second section, ARcuatTa, in which the tarsus, or last joint of all the legs, is conical, and some- times compressed, but never forming a swimming plate, and the carapax arched in front and narrowed behind, with the claws of equal size in both sexes, and the tail is composed of the same number of segments as in the Portuni. The true Crabs, composing the restricted genus Cancer, Fabr., are the types of this section, and are distinguished by having the third joint of the outer foot-jaws emarginate or sinuated near the inner extremity, and nearly square. The antenne scarcely extend beyond the front, with but few joints, and are folded backwards. Cancer pagurus, Linn., the common large edible crab, has the carapax very broad, and arched for a great dis- tance along the sides, each side having nine festoons, and the middle in front with three short teeth: the claws are large, and the fingers black and armed with obtuse points. It sometimes reaches nearly a foot in breadth, and is of common occurrence on the coasts of England and France. [It is captured by sinking pots, baskets, or nets, baited with decaying animal matter, to a con- siderable depth in the ocean, along the rocky coast. During the summer months it is very abundant, especi- ally where the water is deep; and at low tide they are found in holes of rocks in pairs, male and female, and if the male be taken away another will be found in the hole at the next recess of the tide. By knowing this fact, an experienced fisherman may twice a day take with little work a vast number of specimens, after hay- ing discovered their haunts. In the winter they are supposed to burrow in the sand, or to retire to the deeper parts of the ocean. (Ent. Compend. p. 86.) Mr. Bell has described some beautiful exotic species of this genus in the Transactions of the Zoological Society, i Xantho, Leach, is nearly allied to the Fig. 2.—Cancer Pagurus, Linn., with the tail of the male, a; and ot vol. i.] The onus 3 ¢ U 7 y . the female, b. preceding, but having the external antenne short, and inserted in the external canthus of the eye. The typical species, X. florida, Leach, inhabits our coasts. The genus Perimela, Leach, has a longer carapax, with the edges strongly toothed, the eight hind legs equally compressed, and longer antenne. P. denticulata, Leach, occurs in various parts of our coast, and in the Medi- terranean. ; i ‘ The genus Afelecyclus, Leach, has the carapax nearly rounded, and dentated at the sides, the tail narrower than in the preceding; the lateral antenna elongated, the claws very strong, and rather short. The type of this genus is the Cancer 7-dentatus of Montague, by whom it was discovered on the coast of Devonshire. Other genera, which it would occupy too much space to notice, have been separated by Leach, Latreille, and others. Amongst them, however, the two exotic genera, Mursea, Leach, and Hepatus, Lat., are distinguished by their claws being greatly compressed, so that they have subsequently been separated by Latreille, as a section thence named Cristimani, or crested-handed Crabs. Shell arcuated, with the ) Coyatrina Mr. M‘Leay’s arrangement of the Brachyura, as givenin the 3rd hod ae ; ge y B { Caucrina (Arched Crabs) 4 factoflen untetory inl] part of the Illustrations of the Zuology of Southern Africa, just pub- F ; : s yen, with lished, is as follows -— ! Parthenopina (Rocky Crabs) { pees } Calappina. Tribe Tetragonostoma, Analogies. Tribe Trigonostoma. 5 Pi therina(Parasit. Crabs) Shell orbicular Dromiina. Inachina (Triangular Crabs) Hales Poets aera Lencosina.)} 178 tal nachina (Triang generally spined G Grapsina (Square Crabs) Shell quadrilateral Dorippina. 414 CRUSTACEA. The third section, QUADRILATERA, have the carapax nearly square, or heart-shaped, with the front generally elongated and deflexed, forming a kind of hood. The tail is composed of seven segments in both sexes, the joints being distinct throughout the entire breadth of the tail. The antenne are generally very short. The eyes are generally placed upon long peduncles. Many species reside in the ground, forming burrows for their retreats, and some frequent fresh water. They are able to run very fast. Some of these species have the carapax somewhat heart-shaped [thus nearly resembling some of the 4rcuatal, with the front margin strongly toothed, including the genera Eriphia, Lat., Trapezia, Lat., and Pilumnus, Leach, in which last the claws are of unequal size. The Thelphuse, Lat., have the lateral antenne shorter than the ocular peduncles, and few-jointed. The carapax is nearly of a cordate truncate form, (but broader behind than in the preceding]. There are several species of this genus, which reside in fresh water, but being able to exist for a considerable time out of their native element ; one noticed by the ancients occurs in the south of Europe; it is the Cancer fluviatilis, Belon. It is often repre- sented upon the ancient Greek medals. The Greek monks eat it uncooked, and it forms a common article of food in Italy during Lent. Delalande and De Latour discovered two other species, one in the south of Africa and the other in the mountains of Ceylon. [I have described and figured another species, under the name of Thelphusa cunicularis, discovered by Col. Sykes, in the ghauts of the Deccan, where it occurs in great abundance, and of which Bishop Heber thus speaks in his Journal:—‘“‘ All the grass through the Deccan generally swarms with a small land-crab, which burrows in the ground, and runs with considerable swiftness, even when encumbered with a bundle of food as big as itself; this food is grass, or the green stalks of rice, and it is amusing to see the crab sitting, as it were, upright to cut their hay with their sharp pincers, and then waddling off with their sheaf to their holes, as quickly as their side-long pace will carry them.” Col. Sykes found them on the table lands at an eleva- tion of nearly 4000 feet above the sea, and as they are met with of all sizes, he believes that there productive pro- cess is completed without the Crab having to undertake any annual journey to the sea, their migrations having never been noticed.— Trans. Ent. Soc., vol. i.] To this section also belong other species of Land Crabs, composing the genera Gelasimus, Ocypoda, and Mictyris. The first of these genera has the carapax solid, and nearly quadri- lateral, but rather broader in front; one of the claws is generally much longer than the other, the fingers of the smaller claws being spoon-shaped. The animal closes the mouth of its burrow, which it makes near the shore, with its largerclaw. These burrows are cylindrical, oblique, and very deep, each having a single inhabitant. It is the habit of this Crab to hold up the large claw in the front of the body, as though beckoning to some one, whence they have obtained the name of Calling Crabs. The species of Ocypoda has the eyes extended along the greater length of the foot-stalks. Their claws are also unequal, but not to the same extent as in the Gelasimi. During the day they sit in their burrows, venturing forth only after sun-set. The type Cancer cursor, Linn., inha- bits Syria and Northern Africa. Other species of Land Crabs are of a truncate cordate form, with the shell rounded and dilated at the sides. They inhabit tropical climates, and are called by the inhabitants tourlouroux, painted Crabs, land Crabs, violet Crabs, &c., which names seem to be applied indiscriminately. There are few travellers who have not mentioned their habits, often mixing up much fiction in their accounts. They pass the greater part of their lives in the earth, hiding themselves by day and coming abroad only at night. Sometimes they frequent cemeteries. Once a year, as the period for depositing their eggs draws near, they assemble in numerous com- panies, and following the most direct line, seek the coast without permitting any obstacle to intercept them in their way; after laying their eggs [in the water] they return, greatly enfeebled. It is said that they close the mouth of their burrows at the period of moulting, after which operation, and whilst still soft, they are reckoned a great delicacy. These species compose the genera Uca, Latreille, (type Cancer uca, Linn., South America), and Gecarcinus, Leach, (Cancer ruricola, Cuy., &c.) Another interesting group constitutes the genus Pinnotheres, Latr. These are of very small size [of which there are several native species, named pea-crabs], and which reside, during a portion of the year at least, inside various bivalve shells, such as muscles, &c. The carapax of the females is suborbicular, very thin and soft; whilst that of the males is firmer and nearly globular, and rather pointed in front; the legs are of moderate length, and the claws of the ordinary form; the tail of the female is very ample, and covers the whole of the underside of the body. The ancients believed that the Pea-crab lived upon the best terms with the inhabitant of the shell in which it was found; and that they not only warned them of danger, but went abroad to cater for them. The type is the Cancer Pisum, Lin., and Leach has investigated the species in his Malacostraca Podo- pthalma Britannica; [but this author has given the males and young as distinct species. See further J. V. Thomp- son’s Memoir on this genus in the Entomol. Mag., vol. iii.] The section consists of several other well-marked genera, such as Grapsus, Lamarck, Plagusia, Latr., &c. The fourth section, OrBrcuLaTa, have the carapax either somewhat globular, or rhomboidal, or ovoid, and always very solid; the ocular peduncles are always short, or but slightly elongated; the claws of unequal size, according to the sexes, those of the males being the largest; the tail never consists of seven entire segments; the oral cavity is gradually narrowed towards its superior extremity; and the third joint of the outer foot-jaws is always in the form of along triangle; the posterior legs resemble the preceding, and none of them are very long. Corystes, Latr., has the carapax of an ovoid-oblong form, with the lateral antenne [nearly as long as the body], DECAPODA. 415 and ciliated. The tail is composed of seven segments, but three of them are confluent in the males. The type is Cancer personatus, Herbst., found upon the coast of England. [This genus is of very difficult location, and has little real relation with Leucosia: it is more nearly allied to some of the arcuated species. ] Leucosia, Fab., has the carapax of variable form, but generally globular or ovoid, and as hard as stone; the lateral antennz and eyes are very small; the tail, large and suborbicular in the females, is generally composed of four or five, but never of seven segments. Dr. Leach cut up this genus into many others.