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Mollusca   Listen
proper noun
Mollusca  n. pl.  (Zool.) One of the grand divisions of the animal kingdom, a phylum including the classes Cephalopoda, Gastropoda, Pteropoda, Scaphopoda, and Pelecyopoda (syn. Bivalvia, formerly called 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 multivalve. Note: Formerly the Brachiopoda, Bryzoa, and Tunicata were united with the Lamellibranchiata in an artificial group called Acephala, which was also included under Mollusca. See Molluscoidea.






Collaborative International Dictionary of English 0.48








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"Mollusca" Quotes from Famous Books



... whale in a fossil state, not a single cetaceous animal being known to exist, what naturalist would have ventured conjecture on the possibility of a carcass so gigantic being supported on the minute crustacea and mollusca living in the frozen ...
— A Naturalist's Voyage Round the World - The Voyage Of The Beagle • Charles Darwin

... Newton to discover a great law, etc.) "Geology," Mrs. Eddy says, "has never explained the earth's formations. It cannot explain them." "Natural Science is not really natural or scientific, because it is deduced from the evidences of the senses." "Vertebra, articulata, mollusca, and radiata are evolved by mortal and material thought." "Theorizing about man's development from mushrooms to monkeys, and from monkeys into men, amounts to nothing in the right direction, and very much in the wrong." But it is not only with the ...
— McClure's Magazine, Vol 31, No 2, June 1908 • Various

... "This mollusca is oblong, and of different sizes, from three to eighteen inches in length; and I have seen a few that were not less than two feet long. They were nearly round, a little flattish on one side, which lies next to the bottom of the sea; and they ...
— The Works of Edgar Allan Poe - Volume 3 (of 5) of the Raven Edition • Edgar Allan Poe

... of varieties, which are confessedly derivative. The proof of the finer gradation appears to be forthcoming. Des Hayes and Lyell have concluded that many of the middle Tertiary and a large proportion of the later Tertiary mollusca are specifically identical with living species; and this is still the almost universally prevalent view. But Mr. Agassiz states that, "in every instance where he had sufficient materials, he had ...
— Darwiniana - Essays and Reviews Pertaining to Darwinism • Asa Gray

... been trying to realize from memory the particular instincts of those antediluvian animals of the secondary period, which succeeding to the mollusca, to the crustacea, and to the fish, preceded the appearance of the race of mammifers. The generation of reptiles then reigned supreme upon the earth. These hideous monsters ruled everything in the seas of the secondary period, which formed the strata of which the Jura mountains are composed. Nature ...
— A Journey to the Centre of the Earth • Jules Verne


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