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Univalve :: Univalve (n.) A shell consisting of one valve only; a mollusk whose shell is composed of a single piece, as the snails and conchs..

Terebrating :: Terebrating (a.) Boring; perforating; -- applied to molluskas which form holes in rocks, wood, etc..

Paludina :: Paludina (n.) Any one of numerous species of freshwater pectinibranchiate mollusks, belonging to Paludina, Melantho, and allied genera. They have an operculated shell which is usually green, often with brown bands. See Illust. of Pond snail, under Pond..

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..

Mantle :: Mantle (n.) The external fold, or folds, of the soft, exterior membrane of the body of a mollusk. It usually forms a cavity inclosing the gills. See Illusts. of Buccinum, and Byssus..

Multivalve :: Multivalve (n.) Any mollusk which has a shell composed of more than two pieces.

Dioecia :: Dioecia (n. pl.) A subclass of gastropod mollusks in which the sexes are separate. It includes most of the large marine species, like the conchs, cones, and cowries..

Whilk :: Whilk (n.) A kind of mollusk, a whelk..

Rhipidoglossa :: Rhipidoglossa (n. pl.) A division of gastropod mollusks having a large number of long, divergent, hooklike, lingual teeth in each transverse row. It includes the scutibranchs. See Illustration in Appendix..

Atlanta :: Atlanta (n.) A genus of small glassy heteropod mollusks found swimming at the surface in mid ocean. See Heteropod.

Midas''s Ear :: Midas's ear () A pulmonate mollusk (Auricula, / Ellobium, aurismidae); -- so called from resemblance to a human ear..

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..

Slug :: Slug (n.) Any smooth, soft larva of a sawfly or moth which creeps like a mollusk; as, the pear slug; rose slug..

Slug :: Slug (n.) Any one of numerous species of terrestrial pulmonate mollusks belonging to Limax and several related genera, in which the shell is either small and concealed in the mantle, or altogether wanting. They are closely allied to the land snails..

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..

Glaucus :: Glaucus (n.) A genus of nudibranchiate mollusks, found in the warmer latitudes, swimming in the open sea. These mollusks are beautifully colored with blue and silvery white..

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..

Foot :: Foot (n.) The muscular locomotive organ of a mollusk. It is a median organ arising from the ventral region of body, often in the form of a flat disk, as in snails. See Illust. of Buccinum..

Ootheca :: Ootheca (n.) An egg case, especially those of many kinds of mollusks, and of some insects, as the cockroach. Cf. Ooecium..

Turritella :: Turritella (n.) Any spiral marine gastropod belonging to Turritella and allied genera. These mollusks have an elongated, turreted shell, composed of many whorls. They have a rounded aperture, and a horny multispiral operculum..

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