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Amphibia   Listen
Amphibia  n. pl.  (Zool.) One of the classes of vertebrates. Note: The Amphibia are distinguished by having usually no scales, by having eggs and embryos similar to those of fishes, and by undergoing a complete metamorphosis, the young having gills. There are three living orders: (1) The tailless, as the frogs (Anura); (2) The tailed (Urodela), as the salamanders, and the siren group (Sirenoidea), which retain the gills of the young state (hence called Perennibranchiata) through the adult state, among which are the siren, proteus, etc.; (3) The Coecilians, or serpentlike Amphibia (Ophiomorpha or Gymnophiona), with minute scales and without limbs. The extinct Labyrinthodonts also belonged to this class. The term is sometimes loosely applied to both reptiles and amphibians collectively.

Collaborative International Dictionary of English 0.48

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"Amphibia" Quotes from Famous Books

... you are half a Gargoyle yourself, Mellor, or you would have known that. You belong to the amphibia at present. When you've grown out of that you will know ...
— The Hero of Garside School • J. Harwood Panting

... higher antiquity than the Permian until the year 1844, when the Apateon pedestris, Meyer, was discovered in the coal-measures of Munster-Appel in Rhenish Bavaria, and three years later, in 1847, Professor von Dechen found three other distinct species of the same family of Amphibia in the Saarbruck coal-field above alluded to. These were described by the late Professor Goldfuss under the generic name of Archegosaurus. The skulls, teeth, and the greater portions of the skeleton, nay, even a large part of the skin, ...
— The Student's Elements of Geology • Sir Charles Lyell

... originally only lived in water, through gradual efforts to go on dry land also, to which, perhaps, they were forced to preserve their species, thereby changed the original fins into legs and later into web-feet by which they were adapted to live in water as well as on land (amphibia). ...
— Buchanan's Journal of Man, August 1887 - Volume 1, Number 7 • Various

... the Species of Reptiles and Amphibia hitherto described as inhabiting Australia, with a description of some New Species from Western Australia, and some remarks on their geographical distribution, by John Edward Gray, F.R.S., etc. etc., in ...
— Journals Of Two Expeditions Of Discovery In North-West And Western Australia, Vol. 2 (of 2) • George Grey

... positively astonishing when we remember that the artist (we cannot refuse him this title) bad no tools at his disposal but a few miserable flints or roughly pointed bones. The hinder limbs, so strangely placed in amphibia, are faithfully rendered; each paw has its five toes, the texture of the skin can be made out, the head is delicately modelled; the muzzle with its whiskers, the eye, the orifice of the ear, all testify to real skill. The existence of the seal in the Quaternary epoch in the ...
— Manners and Monuments of Prehistoric Peoples • The Marquis de Nadaillac

... with an emotional halo, such as "food," "enemy," "home." Long afterwards, words became in man the medium of reasoned discourse. Sentences were made and judgments expressed. But was not the beginning in the croaking of Amphibia? ...
— The Outline of Science, Vol. 1 (of 4) - A Plain Story Simply Told • J. Arthur Thomson

... while the so called "visceral arches" throw out filaments which receive the arterial branches coming from the aortic arches, and so become the organs of respiration, or branchiae. But in all the other vertebrata (i.e. except fish and amphibia) the gill-slits do not develop branchiae, become closed (with the frequent exception of the first), and so never subserve the function of respiration. Or, as Mr. Darwin states it, "At this period the arteries run in arch-like branches, as if to carry the blood to branchiae which ...
— The Scientific Evidences of Organic Evolution • George John Romanes

... Edrioasterida, among the Echinoderms; and two, the Trilobita and Eurypterida, among the Crustacea; making altogether five for the great sub-kingdom of Annulosa. Among Vertebrates there is no ordinally distinct fossil fish: there is only one extinct order of Amphibia—the Labyrinthodonts; but there are at least four distinct orders of Reptilia, viz. the Ichthyosauria, Plesiosauria, Pterosauria, Dinosauria, and perhaps another or two. There is no known extinct order of Birds, and no certainly known ...
— Lay Sermons, Addresses and Reviews • Thomas Henry Huxley

Words linked to "Amphibia" :   Salientia, Gymnophiona, Labyrinthodontia, order Salientia, subphylum Vertebrata, class, amphibian, order Caudata, superorder Labyrinthodontia, order Gymnophiona, Anura, genus Hynerpeton, amphibious, Hynerpeton, Labyrinthodonta, class Amphibia, genus Ichthyostega, superorder Labyrinthodonta, Urodella, pollywog, order Anura, order Urodella, order Stegocephalia, Batrachia, polliwog

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