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he genus Petromyzon, and allied genera. The lampreys have a round, sucking mouth, without jaws, but set with numerous minute teeth, and one to three larger teeth on the palate (see Illust. of Cyclostomi). There are seven small branchial openings on each side. [Written also lamper eel, lamprel, and lampron.]…

A genus of extinct mammals allied to the cats, and having in the upper jaw canine teeth of remarkable size and strength; -- hence called saber-toothed tigers.

Long-jawed. Huxley.

Having soft jaws without teeth, as certain fishes.

The bone, or principal bone, of the lower jaw; the inferior maxilla; -- also applied to either the upper or the lower jaw in the beak of birds.

cavities, cartilaginous skeletons, absence of limbs, and a suckerlike mouth destitute of jaws. It includes the lampreys and hagfishes. See Cyclostoma, and Lamprey. Called also Marsipobranchiata, and Marsipobranchii.

The large muscle which raises the under jaw, and assists in mastication.

The bone of either the upper or the under jaw.

Pertaining to either the upper or the lower jaw, but now usually applied to the upper jaw only. -- n.

have three pairs, but many of the lower Crustacea have but one pair of them. Called also jawfoot, and foot jaw.

The jaw; the head or skull. [Obs.] Shak.

Of or pertaining to the chin and lower jaw. -- n.

Having the jaws slightly projecting; between prognathous and orthognathous. See Gnathic index, under Gnathic.

el. See Gin block, under 5th Gin. -- Monkey wrench, a wrench or spanner having a movable jaw.

in America. They were serpentlike in form and in having loosely articulated and dilatable jaws, with large recurved tteth, but they had paddlelike feet. Some of them were over fifty feet long. They are, essentially, fossil sea serpents with paddles. Called also Pythonomarpha, and Mosasauria.

The opening through which an animal receives food; the aperture between the jaws or between the lips; also, the cavity, containing the tongue and teeth, between the lips and the pharynx; the buccal cavity.

Having the basal joints of the legs converted into jaws.

Pertaining to, or in the region of, the lower jaw and the hyoid apparatus; as, the mylohyoid nerve.

ly in the plural; as, The Narrows of New York harbor. Near the island lay on one side the jaws of a dangerous narrow. Gladstone.

ly has one long, twisted, pointed canine tooth, or tusk projecting forward from the upper jaw like a horn, whence it is called also sea unicorn, unicorn fish, and unicorn whale. Sometimes two horns are developed, side by side.