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Integropallial :: Integropallial (a.) Having the pallial line entire, or without a sinus, as certain bivalve shells..

Typhlosole :: Typhlosole (n.) A fold of the wall which projects into the cavity of the intestine in bivalve mollusks, certain annelids, starfishes, and some other animals..

Equivalved :: Equivalved (a.) Having the valves equal in size and from, as in most bivalve shells..

Tube :: Tube (n.) One of the siphons of a bivalve mollusk.

Lamellibranchiata :: Lamellibranchiata (n. pl.) A class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc..

Sea Clam :: Sea clam () Any one of the large bivalve mollusks found on the open seacoast, especially those of the family Mactridae, as the common American species. (Mactra, / Spisula, solidissima); -- called also beach clam, and surf clam..

Scallop :: Scallop (n.) Any one of numerous species of marine bivalve mollusks of the genus Pecten and allied genera of the family Pectinidae. The shell is usually radially ribbed, and the edge is therefore often undulated in a characteristic manner. The large adductor muscle of some the species is much used as food. One species (Vola Jacobaeus) occurs on the coast of Palestine, and its shell was formerly worn by pilgrims as a mark that they had been to the Holy Land. Called also fan shell. See Pecten, 2..

Shipworm :: Shipworm (n.) Any long, slender, worm-shaped bivalve mollusk of Teredo and allied genera. The shipworms burrow in wood, and are destructive to wooden ships, piles of wharves, etc. See Teredo..

Borer :: Borer (n.) Any bivalve mollusk (Saxicava, Lithodomus, etc.) which bores into limestone and similar substances..

Mya :: Mya (n.) A genus of bivalve mollusks, including the common long, or soft-shelled, clam..

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

Pearl :: Pearl (n.) A shelly concretion, usually rounded, and having a brilliant luster, with varying tints, found in the mantle, or between the mantle and shell, of certain bivalve mollusks, especially in the pearl oysters and river mussels, and sometimes in certain univalves. It is usually due to a secretion of shelly substance around some irritating foreign particle. Its substance is the same as nacre, or mother-of-pearl. Pearls which are round, or nearly round, and of fine luster, are highly esteemed

Valve :: Valve (n.) One of the pieces or divisions of bivalve or multivalve shells.

Holostraca :: Holostraca (n. pl.) A division of phyllopod Crustacea, including those that are entirely covered by a bivalve shell..

Subumbrella :: Subumbonal (a.) Beneath or forward of the umbos of a bivalve shell.

Escutcheon :: Escutcheon (n.) The depression behind the beak of certain bivalves; the ligamental area.

Nates :: Nates (n. pl.) The umbones of a bivalve shell.

Lithodome :: Lithodome (n.) Any one of several species of bivalves, which form holes in limestone, in which they live; esp., any species of the genus Lithodomus..

Lunule :: Lunule (n.) A special area in front of the beak of many bivalve shells. It sometimes has the shape of a double crescent, but is oftener heart-shaped. See Illust. of Bivalve..

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..

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