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Siphon :: Siphon (n.) The siphuncle of a cephalopod shell.

Tectibranchiata :: Tectibranchiata (n. pl.) An order, or suborder, of gastropod Mollusca in which the gills are usually situated on one side of the back, and protected by a fold of the mantle. When there is a shell, it is usually thin and delicate and often rudimentary. The aplysias and the bubble shells are examples..

Coronated :: Coronated (a.) Girt about the spire with a row of tubercles or spines; -- said of spiral shells.

Miliolite :: Miliolite (n.) A fossil shell of, or similar to, the genus Miliola..

Yet :: Yet (n.) Any one of several species of large marine gastropods belonging to the genus Yetus, or Cymba; a boat shell..

Seawant :: Seawant (n.) The name used by the Algonquin Indians for the shell beads which passed among the Indians as money.

Imperforata :: Imperforata (n. pl.) A division of Foraminifera, including those in which the shell is not porous..

Tubivalve :: Tubivalve (n.) A shell or tube formed by an annelid, as a serpula..

Crustaceous :: Crustaceous (a.) Pertaining to, or of the nature of, crust or shell; having a crustlike shell..

Sheal :: Sheal (v. t.) To take the husks or pods off from; to shell; to empty of its contents, as a husk or a pod..

Carinaria :: Carinaria (n.) A genus of oceanic heteropod Mollusca, having a thin, glassy, bonnet-shaped shell, which covers only the nucleus and gills..

Turreted :: Turreted (a.) Furnished with a turret or turrets; specifically (Zool.), having the whorls somewhat flattened on the upper side and often ornamented by spines or tubercles; -- said of certain spiral shells..

Cerite :: Cerite (n.) A gastropod shell belonging to the family Cerithiidae; -- so called from its hornlike form.

Escalop :: Escalop (n.) A bivalve shell of the genus Pecten. See Scallop.

Mask Shell :: Mask shell () Any spiral marine shell of the genus Persona, having a curiously twisted aperture..

Leatherback :: Leatherback (n.) A large sea turtle (Sphargis coriacea), having no bony shell on its back. It is common in the warm and temperate parts of the Atlantic, and sometimes weighs over a thousand pounds; -- called also leather turtle, leathery turtle, leather-backed tortoise, etc..

Globigerina :: Globigerina (n.) A genus of small Foraminifera, which live abundantly at or near the surface of the sea. Their dead shells, falling to the bottom, make up a large part of the soft mud, generally found in depths below 3,000 feet, and called globigerina ooze. See Illust. of Foraminifera..

Reticularia :: Reticularia (n. pl.) An extensive division of rhizopods in which the pseudopodia are more or less slender and coalesce at certain points, forming irregular meshes. It includes the shelled Foraminifera, together with some groups which lack a true shell..

Purpura :: Purpura (n.) A genus of marine gastropods, usually having a rough and thick shell. Some species yield a purple dye..

Shelling :: Shelling (p. pr. & vb. n.) of Shel.

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