,u aaros, breast, 6Sous, tooth), a name given by Cuvier to the Pliocene and Miocene forerunners of the elephants, on account of the nipple-like prominences on the molar teeth of some of the species (fig.
The following are some of the forms Cuvier, Lankester's Treatise on of cormidia that occur: Zoology.
Supported by the great authority of Haller, the doctrine of evolution, or development, prevailed throughout the whole of the 18th century, and Cuvier appears to have substantially adopted Bonnet's later views, though probably he would not have gone all lengths in the direction of " emboitement."
Cuvier considerant que tous les titres organises sont derives de parens, et ne voyant dans la nature aucune force capable de produire l'organisation, croyait a la pre-existence des germes; non pas a la pre-existence d'un titre tout forme, puisqu'il est bien evident que ce n'est que par des developpemens successifs que l'etre acquiert sa forme; mais, si l'on peut s'exprimer ainsi, a la pre-existence du radical de l'etre, radical qui existe avant que la serie des evolutions ne commence, et qui remonte certainement, suivant la belle observation de Bonnet, a plusieurs generations."
- Laurillard, Eloge de Cuvier, note 12.
The school of Cuvier was lamentably deficient in embryologists; and it was only in the course of the first thirty years of the igth century that Prevost and Dumas in France, and, later on, Ddllinger, Pander, von Bar, Rathke, and Remak in Germany, founded modern embryology; and, at the same time, proved the utter incompatibility of the hypothesis of evolution as formulated by Bonnet and Haller with easily demonstrable facts.
The vast authority of Cuvier was employed in support of the traditionally respectable hypotheses of special creation and of catastrophism; and the wild speculations of the Discours sur les revolutions de la surface du globe were held to be models of sound scientific thinking, while the really much more sober and philosophical hypotheses of the Hydrogeologie were scouted.
Cuvier on anatomical, and Von Baer on embryological grounds, made the further step of proving that, even in this limited sense, animals cannot be arranged in a single series, but that there are several distinct plans of organization to be observed among them, no one of which, in its highest and most complicated modification, leads to any of the others.
The conclusions enunciated by Cuvier and Von Baer have been confirmed in principle by all subsequent research into the structure of animals and plants.
RADIATA, a term introduced by Cuvier in 1812 to denote the lowest of his four great animal groups or "embranchements."
RUMINANTIA, a term employed by Cuvier to include all the existing artiodactyle ruminating ungulate mammals now classed under the groups Pecora, Tylopoda and Tragulina.
This circlet of gill-lamellae led Cuvier to class the limpets as Cyclobranchiata, and, by erroneous identification of them with the series of metamerically repeated ctenidia of Chiton, to associate the latter mollusc with the former.
This fact led Cuvier erroneously to the belief that a duct existed leading from the gonad to this papilla.
(From Owen, after Cuvier.) Fam.
(After Cuvier.) t, Anterior cephalic tentacles.
Ancient animal), a name applied by Cuvier to the remains of ungulate mammals recalling tapirs in general appearance, from the Lower Oligocene gypsum quarries of Paris.
It was reserved for Georges Cuvier, who in 1798 published at Paris his Tableau elementaire de l'histoire naturelle des ani-.
5 Though he made a perceptible advance on the classification of Linnaeus, at that time predominant, it is now easy to see in how many ways - want of sufficient material being no doubt one of the chief - Cuvier failed to produce a really natural arrangement.
But this view is gained by following the methods which Cuvier taught.
Yet, in order to determine the difference of structure in their organs of voice, Cuvier, as he says in his Legons (iv.
The new doctrine, loudly proclaiming the discovery of a " Natural" System, led away many from the steady practice which should have followed the teaching of Cuvier (though he in ornithology had not been able to act up to the principles he had lain down) and from the extended study of Comparative Anatomy.
Tiedemann's carefully-wrought Anatomic and N aturgeschichte der V gel - which shows a remarkable advance upon the work which Cuvier did in 1805, and in some respects is superior to his later production of 1817.
Yet over and over again his determination of the affinities of several groups even of European birds was disregarded; and his labours, being contained in a bulky and costly work, were hardly known at all outside of his own country, and within it by no means appreciated so much as they deserved '-for even Naumann himself, who gave them publication, and was doubtless in some degree influenced by them, utterly failed to perceive the importance of the characters offered by the song-muscles of certain groups, though their peculiarities were all duly described and recorded by his coadjutor, as some indeed had been long before by Cuvier in his famous dissertation 2 on the organs of voice in birds (Lecons d'anatomie comparee, iv.
Nitzsch's name was subsequently dismissed by Cuvier without a word of praise, and in terms which would have been applicable to many another and inferior author, while Temminck, terming Naumann's work an " ouvrage de luxe "-it being in truth one of the cheapest for its contents ever published-effectually shut it out from the realms of science.
3-93) the " Recherches sur l'appareil sternal des Oiseaux," which the precept and example of his master had prompted him to undertake, and Cuvier had found for him the means of executing.
It would be necessary to enter; but the trenchant way in which he showed that the " Passereaux "-a group of which Cuvier had said, " Son caractere semble d'abord purement negatif," and had then failed to define the limitsdiffered so completely from every other assemblage, while maintaining among its own innumerable members an almost perfect essential homogeneity, is very striking, and shows how admirably he could grasp his subject.
By this time he had visited several of the principal museums on the Continent, among others Leyden (where Temminck resided) and Paris (where he had frequent intercourse with Cuvier), thus becoming acquainted with a considerable number of exotic forms that had hitherto been inaccessible to him.
The latter's name seems not to be even mentioned by him, but Nitzsch was in Paris in the summer of 1827, and it is almost impossible that he should not have heard of L'Herminier's labours, unless the relations between the followers of Cuvier to whom Nitzsch attached himself, and those of De Blainville, whose pupil L'Herminier was, were such as to forbid anv communication between the rival schools.
Yet we have L'Herminier's evidence that Cuvier gave him every assistance.
At the very beginning of the year 1832 Cuvier laid before the Academy of Sciences of Paris a memoir on the progress of ossifi cation in the sternum of birds, of which memoir an cuvier abstract will be found in the Annales des sciences and naturelles (xxv.
Geoffroy here maintained that the five centres of ossification existed in the duck just as in the fowl, and that the real difference of the process lay in the period at which they made their appearance, a circumstance which, though virtually proved by the preparations Cuvier had used, had been by him overlooked or misinterpreted.
Nor, argued Geoffroy, was it true to say, - as Cuvier had said, that the like occurred in the pigeons and true passerines.
Cuvier seems to have acquiesced in the corrections of his views made by Geoffroy, and attempted no rejoinder; but the attentive and impartial student of the discussion will see that a good deal was really wanting to make the latter's reply effective, though, as events have shown, the former was hasty in the conclusions at which he arrived, having trusted too much to the first appearance of centres of ossification, for, had his observations in regard to other birds been carried on with the same attention to detail as in regard to the fowl, he would certainly have reached some very different results.
The points at issue between Cuvier and Etienne Geoffroy St-Hilaire before mentioned naturally attracted the attention of L'Herminier, who in 1836 presented to the French Academy the results of his researches into the mode Isidore of growth of that bone which in the adult bird he had already studied to such good purpose.
As regards the ducks, L'Herminier agreed with Cuvier that there are commonly only two centres of ossification - the side-pieces of the middle series; but as these grow to meet one another a distinct median " noyau," also of the same series, sometimes appears, which soon forms a connexion with each of them.
Indeed it is, as the latter says, that of Linnaeus, improved by Cuvier, with an additional modification of Illiger'sall these three authors having totally ignored any but external characters.
Views - for it was a generation whose leaders, in France at any rate, looked with suspicion upon any one who professed to go beyond the bounds which the genius of Cuvier had been unable to overpass, and regarded the notion of upsetting any of the positions maintained by him as verging almost upon profanity.
Scansores, being the Grimpeurs of Cuvier, the Zygodactyli of several other systematists.
Its basis is the classification of Cuvier, the modifications of which by Des Murs will seldom commend themselves to systematists whose opinion is generally deemed worth having.
Cuvier (Lecons d'anatomie comparee, 1800-1805), and in England by W.
Cuvier gives an interesting account of a young wolf which, having been trained to follow his master, showed affection and submission scarcely inferior to the domesticated dog.
Cuvier expresses the opinion that the dog exhibits the most complete and the most useful conquest that man has made.
Cuvier in 1805, and by A.
In the Tableau Elementaire, published in 1795, Cuvier adopts Linnaeus's term in its earlier sense, but uses the French word "Reptiles," already brought into use by Brisson, as the equivalent of Amphibia.
In addition Cuvier accepts the Linnaean subdivisions of Amphibia-Reptilia for the tortoises, lizards (including crocodiles), salamanders and frogs; and Amphibia-Serpentes for the snakes, apodal lizards and Caeciliae.
Cuvier went no further than Brongniart, and, in the Regne Animal, he dropped the term Amphibia, and substituted Reptilia for it.
The science of geology came into existence, and the whole panorama of successive stages of the earth's history, each with its distinct population of strange animals and plants, unlike those of the present day and simpler in proportion as they recede into the past, was revealed by Cuvier, Agassiz and others.
- The work of the collector and systematist: exemplified by Linnaeus and his predecessors, by Cuvier, Agassiz, Haeckel.
- General conceptions with regard to the relations of living things (especially animals) to the universe, to man, and to the Creator, their origin and significance: exemplified in the writings of the philosophers of classical antiquity, and of Linnaeus, Goethe, Lamarck, Cuvier, Lyell, H.