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Cyclostrema pompholyx
''Cyclostrema pompholyx'' is a species of sea snail, a marine gastropod mollusk in the family Liotiidae.
==Description==
(Original description by W.H. Dall) The maximum diameter of the base is 4.2 mm; the minimum diameter 3.0 mm. The height of the shell attains 3.0 mm. The white, thin and polished shell contains three rounded, rapidly enlarging whorls. The sculpture consists of incremental striae. The suture is deep but not channelled. The whorls are very round, but the spire is hardly rising above the body whorl. The base of the shell is rounded, with a very narrow umbilicus, into which the whorl descends without any angle or other change of curve. The large aperture is circular, the upper part a little angulated at the suture. The simple margin is sharp and somewhat expanded but hardly reflected.〔(Dall W. H. 1889. Reports on the results of dredging, under the supervision of Alexander Agassiz, in the Gulf of Mexico (1877-78) and in the Caribbean Sea (1879-80), by the U.S. Coast Survey Steamer "Blake", Lieut.-Commander C.D. Sigsbee, U.S.N., and Commander J.R. Bartlett, U.S.N., commanding. XXIX. Report on the Mollusca. Part 2, Gastropoda and Scaphopoda. Bulletin of the Museum of Comparative Zoölogy at Harvard College 18: 1-492, pls. 10-40 )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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