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Eulithidium comptum
''Eulithidium comptum'', common name the ''Californian banded pheasant shell'', is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Phasianellidae, the pheasant snails.〔Rosenberg, G. (2012). ''Eulithidium comptum'' (Gould, 1855). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=528059 on 2013-02-10〕〔Turgeon, D.D., et al. 1998. Common and scientific names of aquatic invertebrates of the United States and Canada. American Fisheries Society Special Publication 26〕
==Description==
This small, high-spired shell grows to a height varying between 6 mm and 10 mm. It has a pointed-oblong shape. It is somewhat solid, yellowish, pinkish or whitish, more or less clouded longitudinally with purple, dull pink or gray. It is marked with numerous narrow close revolving descending lines of purple, pink or drab, sometimes conspicuously flammulate below the sutures, and broadly transversely fasciate on its base. The 5-6 smooth whorls are closely coiled above, with shallow sutures. The body whorl is more rapidly descending, separated by a deep suture. The aperture is usually less than half the length of shell. It is very oblique, short ovate with the inner margin arcuate. The narrow umbilical region is excavated and generally minutely perforate. The operculum is white, inside stained with blue above.
The radula is similar to that of ''Tricolia pullus'' (Linnaeus, 1758) but has only 4 lateral teeth on either side, by atrophy of the narrow outer one. 〔 (G.W. Tryon (1888), Manual of Conchology X; Academy of Natural Sciences, Philadelphia ) (described as ''Phasianella compta'') 〕
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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