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Sea Trumpet :: Sea trumpet () Any large marine univalve shell of the genus Triton. See Triton.

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

Discoid :: Discoid (a.) Having the form of a disk, as those univalve shells which have the whorls in one plane, so as to form a disk, as the pearly nautilus..

Tulip-shell :: Tulip-shell (n.) A large, handsomely colored, marine univalve shell (Fasciolaria tulipa) native of the Southern United States. The name is sometimes applied also to other species of Fasciolaria..

Bubble Shell :: Bubble shell () A marine univalve shell of the genus Bulla and allied genera, belonging to the Tectibranchiata..

Mollusca :: Mollusca (n. pl.) One of the grand divisions of the animal kingdom, including the classes Cephalopoda, Gastropoda, PteropodaScaphopoda, and Lamellibranchiata, or Conchifera. These animals have an unsegmented bilateral body, with most of the organs and parts paired, but not repeated longitudinally. Most of them develop a mantle, which incloses either a branchial or a pulmonary cavity. They are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or m

Decollated :: Decollated (a.) Decapitated; worn or cast off in the process of growth, as the apex of certain univalve shells..

Cymbium :: Cymbium (n.) A genus of marine univalve shells; the gondola.

Megastome :: Megastome (n.) One of a group of univalve shells, having a large aperture or mouth..

Gyration :: Gyration (n.) One of the whorls of a spiral univalve shell.

Strombite :: Stromb (n.) Any marine univalve mollusk of the genus Strombus and allied genera. See Conch, and Strombus..

Spindle :: Spindle (n.) Any marine univalve shell of the genus Rostellaria; -- called also spindle stromb.

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

Conch :: Conch (n.) A name applied to various marine univalve shells; esp. to those of the genus Strombus, which are of large size. S. gigas is the large pink West Indian conch. The large king, queen, and cameo conchs are of the genus Cassis. See Cameo..

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..

Columella :: Columella (n.) The upright pillar in the axis of most univalve shells.

Ear-shell :: Ear-shell (n.) A flattened marine univalve shell of the genus Haliotis; -- called also sea-ear. See Abalone.

Univalve :: Univalve (a.) Alt. of Univalve.

Columbella :: Columbella (n.) A genus of univalve shells, abundant in tropical seas. Some species, as Columbella mercatoria, were formerly used as shell money..

Buccinum :: Buccinum (n.) A genus of large univalve mollusks abundant in the arctic seas. It includes the common whelk (B. undatum).

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