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Amphiuma :: Amphiuma (n.) A genus of amphibians, inhabiting the Southern United States, having a serpentlike form, but with four minute limbs and two persistent gill openings; the Congo snake..

Ophiomorpha :: Ophiomorpha (n. pl.) An order of tailless amphibians having a slender, wormlike body with regular annulations, and usually with minute scales imbedded in the skin. The limbs are rudimentary or wanting. It includes the caecilians. Called also Gymnophiona and Ophidobatrachia..

Congo Snake :: Congo snake () An amphibian (Amphiuma means) of the order Urodela, found in the southern United States. See Amphiuma..

Caecilian :: Caecilian (n.) A limbless amphibian belonging to the order Caeciliae or Ophimorpha. See Ophiomorpha.

Operculum :: Operculum (n.) The fold of integument, usually supported by bony plates, which protects the gills of most fishes and some amphibians; the gill cover; the gill lid..

Tadpole :: Tadpole (n.) The young aquatic larva of any amphibian. In this stage it breathes by means of external or internal gills, is at first destitute of legs, and has a finlike tail. Called also polliwig, polliwog, porwiggle, or purwiggy..

Ichthyoidal :: Ichthyoidal (a.) Somewhat like a fish; having some of the characteristics of fishes; -- said of some amphibians.

Anura :: Anura (n. pl.) One of the orders of amphibians characterized by the absence of a tail, as the frogs and toads..

Articulary :: Articulary (n.) A bone in the base of the lower jaw of many birds, reptiles, amphibians, and fishes..

Web :: Web (n.) The membrane which unites the fingers or toes, either at their bases, as in man, or for a greater part of their length, as in many water birds and amphibians..

Trachystomata :: Trachystomata (n. pl.) An order of tailed aquatic amphibians, including Siren and Pseudobranchus. They have anterior legs only, are eel-like in form, and have no teeth except a small patch on the palate. The external gills are persistent through life..

Vent :: Vent (n.) The anal opening of certain invertebrates and fishes; also, the external cloacal opening of reptiles, birds, amphibians, and many fishes..

Cloaca :: Cloaca (n.) The common chamber into which the intestinal, urinary, and generative canals discharge in birds, reptiles, amphibians, and many fishes..

Anallantoidea :: Anallantoidea (n. pl.) The division of Vertebrata in which no allantois is developed. It includes amphibians, fishes, and lower forms..

Septomaxillary :: Septomaxillary (n.) A small bone between the nasal septum and the maxilla in many reptiles and amphibians.

Urostyle :: Urostyle (n.) A styliform process forming the posterior extremity of the vertebral column in some fishes and amphibians.

Stegosauria :: Stegocephala (n. pl.) An extinct order of amphibians found fossil in the Mesozoic rocks; called also Stegocephali, and Labyrinthodonta..

Coracoid :: Coracoid (a.) Pertaining to a bone of the shoulder girdle in most birds, reptiles, and amphibians, which is reduced to a process of the scapula in most mammals..

Synantherous :: Synangium (n.) The divided part beyond the pylangium in the aortic trunk of the amphibian heart.

Siren :: Siren (n.) Any long, slender amphibian of the genus Siren or family Sirenidae, destitute of hind legs and pelvis, and having permanent external gills as well as lungs. They inhabit the swamps, lagoons, and ditches of the Southern United States. The more common species (Siren lacertina) is dull lead-gray in color, and becames two feet long..

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