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Pallet :: Pallet (n.) One of a pair of shelly plates that protect the siphon tubes of certain bivalves, as the Teredo. See Illust. of Teredo..

Ostrea :: Ostrea (n.) A genus of bivalve Mollusca which includes the true oysters.

Lithophagous :: Lithophagous (a.) Eating or destroying stone; -- applied to various animals which make burrows in stone, as many bivalve mollusks, certain sponges, annelids, and sea urchins. See Lithodomus..

Plate-gilled :: Plate-gilled (a.) Having flat, or leaflike, gills, as the bivalve mollusks..

Pandora :: Pandora (n.) A genus of marine bivalves, in which one valve is flat, the other convex..

Whorl :: Whorl (n. & v.) A volution, or turn, of the spire of a univalve shell..

Malacobdella :: Malacobdella (n.) A genus of nemertean worms, parasitic in the gill cavity of clams and other bivalves. They have a large posterior sucker, like that of a leech. See Illust. of Bdellomorpha..

Trigonia :: Trigonia (n.) A genus of pearly bivalve shells, numerous extinct species of which are characteristic of the Mesozoic rocks. A few living species exist on the coast of Australia..

Bucket :: Bucket (n.) The valved piston of a lifting pump.

Supplyant :: Supply (a.) Serving to contain, deliver, or regulate a supply of anything; as, a supply tank or valve..

Lip :: Lip (n.) One of the edges of the aperture of a univalve shell.

Inoceramus :: Inoceramus (n.) An extinct genus of large, fossil, bivalve shells,allied to the mussels. The genus is characteristic of the Cretaceous period..

Tube-shell :: Tube-shell (n.) Any bivalve mollusk which secretes a shelly tube around its siphon, as the watering-shell..

Cover :: Cover (n.) The lap of a slide valve.

Bellows :: Bellows (n. sing. & pl.) An instrument, utensil, or machine, which, by alternate expansion and contraction, or by rise and fall of the top, draws in air through a valve and expels it through a tube for various purposes, as blowing fires, ventilating mines, or filling the pipes of an organ with wind..

Gate :: Gate (n.) A door, valve, or other device, for stopping the passage of water through a dam, lock, pipe, etc..

Cyphonautes :: Cyphonautes (n.) The free-swimming, bivalve larva of certain Bryozoa..

Oyster :: Oyster (n.) Any marine bivalve mollusk of the genus Ostrea. They are usually found adhering to rocks or other fixed objects in shallow water along the seacoasts, or in brackish water in the mouth of rivers. The common European oyster (Ostrea edulis), and the American oyster (Ostrea Virginiana), are the most important species..

Tridacna :: Tridacna (n.) A genus of very large marine bivalve shells found on the coral reefs of the Indian and Pacific Oceans. One species (T. gigas) often weighs four or five hundred pounds, and is sometimes used for baptismal fonts. Called also paw shell, and fountain shell..

Helicoid :: Helicoid (a.) Spiral; curved, like the spire of a univalve shell..

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