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Molluscoid :: Molluscoid (n.) One of the Molluscoidea.

Scaphopda :: Scaphopda (n. pl.) A class of marine cephalate Mollusca having a tubular shell open at both ends, a pointed or spadelike foot for burrowing, and many long, slender, prehensile oral tentacles. It includes Dentalium, or the tooth shells, and other similar shells. Called also Prosopocephala, and Solenoconcha..

Cephalopoda :: Cephalopoda (n. pl.) The highest class of Mollusca.

Molluscan :: Molluscan (n.) A mollusk; one of the Mollusca.

Bivalve :: Bivalve (n.) A mollusk having a shell consisting of two lateral plates or valves joined together by an elastic ligament at the hinge, which is usually strengthened by prominences called teeth. The shell is closed by the contraction of two transverse muscles attached to the inner surface, as in the clam, -- or by one, as in the oyster. See Mollusca..

Opisthopulmonate :: Opisthopulmonate (a.) Having the pulmonary sac situated posteriorly; -- said of certain air-breathing Mollusca.

Bojanus Organ :: Bojanus organ () A glandular organ of bivalve mollusca, serving in part as a kidney..

Molluscoidal :: Molluscoidal (a.) Molluscoid.

Mollusk :: Mollusk (n.) One of the Mollusca.

Cirrus :: Cirrus (n.) A soft tactile appendage of the mantle of many Mollusca, and of the parapodia of Annelida. Those near the head of annelids are Tentacular cirri; those of the last segment are caudal cirri..

Cirrobranchiata :: Cirrobranchiata (n. pl.) A division of Mollusca having slender, cirriform appendages near the mouth; the Scaphopoda..

Amphineura :: Amphineura (n. pl.) A division of Mollusca remarkable for the bilateral symmetry of the organs and the arrangement of the nerves.

Ceratobranchia :: Ceratobranchia (n. pl.) A group of nudibranchiate Mollusca having on the back papilliform or branched organs serving as gills.

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..

Encephalous :: Encephalous (a.) Having a head; -- said of most Mollusca; -- opposed to acephalous.

Cephalata :: Cephalata (n. pl.) A large division of Mollusca, including all except the bivalves; -- so called because the head is distinctly developed. See Illustration in Appendix..

Scutibranchiata :: Scutibranchiata (n. pl.) An order of gastropod Mollusca having a heart with two auricles and one ventricle. The shell may be either spiral or shieldlike.

Conchifera :: Conchifera (n. pl.) That class of Mollusca which includes the bivalve shells; the Lamellibranchiata. See Mollusca.

Malacozoa :: Malacozoa (n. pl.) An extensive group of Invertebrata, including the Mollusca, Brachiopoda, and Bryozoa. Called also Malacozoaria..

Cirrus :: Cirrus (n.) The external male organ of trematodes and some other worms, and of certain Mollusca..

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