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Cirripedia :: Cirripedia (n. pl.) An order of Crustacea including the barnacles. When adult, they have a calcareous shell composed of several pieces. From the opening of the shell the animal throws out a group of curved legs, looking like a delicate curl, whence the name of the group. See Anatifa..

Limekiln :: Limekiln (n.) A kiln or furnace in which limestone or shells are burned and reduced to lime.

Right-handed :: Right-handed (a.) Having the whorls rising from left to right; dextral; -- said of spiral shells. See Illust. of Scalaria.

Sea-ear :: Sea-ear (n.) Any species of ear-shaped shells of the genus Haliotis. See Abalone.

Aspergillum :: Aspergillum (n.) See Wateringpot shell.

Boat Shell :: Boat shell () A marine gastropod of the genus Crepidula. The species are numerous. It is so named from its form and interior deck.

Trionyx :: Trionyx (n.) A genus of fresh-water or river turtles which have the shell imperfectly developed and covered with a soft leathery skin. They are noted for their agility and rapacity. Called also soft tortoise, soft-shell tortoise, and mud turtle..

Sea Wing :: Sea wing () A wing shell (Avicula).

Dreissena :: Dreissena (n.) A genus of bivalve shells of which one species (D. polymorpha) is often so abundant as to be very troublesome in the fresh waters of Europe.

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

Gulgul :: Gulgul (n.) A cement made in India from sea shells, pulverized and mixed with oil, and spread over a ship's bottom, to prevent the boring of worms..

Orbulina :: Orbulina (n.) A genus of minute living Foraminifera having a globular shell.

Roughcast :: Roughcast (n.) A kind of plastering made of lime, with a mixture of shells or pebbles, used for covering buildings..

Abalone :: Abalone (n.) A univalve mollusk of the genus Haliotis. The shell is lined with mother-of-pearl, and used for ornamental purposes; the sea-ear. Several large species are found on the coast of California, clinging closely to the rocks..

Ambitus :: Ambitus (n.) The exterior edge or border of a thing, as the border of a leaf, or the outline of a bivalve shell..

Peristome :: Peristome (n.) The lip, or edge of the aperture, of a spiral shell..

Thecosomata :: Thecosomata (n. pl.) An order of Pteropoda comprising those species which have a shell. See Pteropoda.

Argus Shell :: Argus shell () A species of shell (Cypraea argus), beautifully variegated with spots resembling those in a peacock's tail..

Blade :: Blade (n.) The four large shell plates on the sides, and the five large ones of the middle, of the carapace of the sea turtle, which yield the best tortoise shell..

Polythalamia :: Polythalamia (n. pl.) A division of Foraminifera including those having a manychambered shell.

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