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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

Limacina :: Limacina (n.) A genus of small spiral pteropods, common in the Arctic and Antarctic seas. It contributes to the food of the right whales..

Pteropodous :: Pteropodous (a.) Of or pertaining to the Pteropoda.

Clione :: Clione (n.) A genus of naked pteropods. One species (Clione papilonacea), abundant in the Arctic Ocean, constitutes a part of the food of the Greenland whale. It is sometimes incorrectly called Clio..

Wing-footed :: Wing-footed (a.) Having the anterior lobes of the foot so modified as to form a pair of winglike swimming organs; -- said of the pteropod mollusks.

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

Gymnosomata :: Gymnosomata (n. pl.) One of the orders of Pteropoda. They have no shell.

Fin :: Fin (n.) A membranous, finlike, swimming organ, as in pteropod and heteropod mollusks..

Metapode :: Metapode (n.) The posterior division of the foot in the Gastropoda and Pteropoda.

Mesopodium :: Mesopodium (n.) The middle portion of the foot in the Gastropoda and Pteropoda.

Pteropod :: Pteropod (n.) One of the Pteropoda.

Wing-shell :: Wing-shell (n.) Any pteropod shell.

Sea Butterfly :: Sea butterfly () A pteropod.

Pteropoda :: Pteropoda (n. pl.) A class of Mollusca in which the anterior lobes of the foot are developed in the form of broad, thin, winglike organs, with which they swim at near the surface of the sea..

Wing :: Wing (n.) One of the broad, thin, anterior lobes of the foot of a pteropod, used as an organ in swimming..

Hyalea :: Hyalea (n.) A pteroid of the genus Cavolina. See Pteropoda, and Illustration in Appendix..

Tentaculite :: Tentaculite (n.) Any one of numerous species of small, conical fossil shells found in Paleozoic rocks. They are supposed to be pteropods..

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