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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.

A division of the Amphibia; the Derotremata.

The tribe of aquatic Amphibia which includes Amphiuma, Menopoma, etc. They have permanent gill openings, but no external gills; -- called also Cryptobranchiata. [Written also Derotrema.]

e living genera Ceratodus and Lepidosiren, which present the closest approximation to the Amphibia. The air bladder acts as a lung, and the nostrils open inside the mouth. See Ceratodus, and Illustration in Appendix.

A division of amphibians having suctorial disks on the toes, as the tree frogs.

A cartilage or bone in front of the pubis in some amphibians and other animals.

A group of fossil amphibians allied to the labyrinthodonts, having the head defended by bony, sculptured plates, as in some ganoid fishes.

aquatic salamander (Megalobatrachus maximus), found in Japan. It is the largest of living Amphibia, becoming a yard long. -- Giant squid (Zoöl.), one of several species of very large squids, belonging to Architeuthis and allied genera. Some are over forty feet long.

ning, or Gill slit (Anat.), an opening behind and below the head of most fishes, and some amphibians, by which the water from the gills is discharged. In most fishes there is a single opening on each side, but in the sharks and rays there are five, or more, on each side. -- Gill rakes, or Gill rakers (Anat.), horny fi…

An order of Amphibia, having a long, annulated, snakelike body. See Ophiomorpha.

Somewhat like a fish; having some of the characteristics of fishes; -- said of some amphibians.

A grand division of the Vertebrata, including the Amphibia and Fishes.

d into one in the adult, though separate in the fetus, as also in many adult reptiles and amphibians. -- Innominate contracts (Law), in the Roman law, contracts without a specific name.

A genus of very large fossil amphibians, of the Triassic period, having bony plates on the under side of the body. It is the type of the order Labyrinthodonta. Called also Mastodonsaurus.

An extinct order of Amphibia, including the typical genus Labyrinthodon, and many other allied forms, from the Carboniferous, Permian, and Triassic formations. By recent writers they are divided into two or more orders. See Stegocephala.

most reptiles; an appendage of the sacculus, corresponding to the cochlea, in fishes and amphibians.

Having a single heart, as fishes and amphibians. -- n.

nd mud in the water can settle for removal. -- Mud eel (Zoöl.), a long, slender, aquatic amphibian (Siren lacertina), found in the Southern United States. It has persistent external gills and only the anterior pair of legs. See Siren. -- Mud frog (Zoöl.), a European frog (Pelobates fuscus). -- Mud hen. (Zoöl.) (a) T…

ument, usually supported by bony plates, which protects the gills of most fishes and some amphibians; the gill cover; the gill lid.

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 cæcilians. Called also Gymnophiona and Ophidobatrachia.