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Julia is a minute sea snails genus, marine gastropod mollusks or micromollusks in the superfamily Oxynooidea. ''Julia'' is the type genus of the family Juliidae. ==Description== As Tryon (1884)〔Tryon G. W. Jr. (1884). (''Structural and systematic conchology: an introduction to the study of the Mollusca. Volume III'' ). Philadelphia, published by the author, (page 267 ).〕 wrote in his description of the genus ''Julia'': the shell is oblong, thick, and cordiform. The valves are closed, the margins entire and the valves are inequilateral. The lunule is deep circular, projecting into the interior of the right valve, the left valve is in the same place furnished with dentiform tubercles. The hinge line is simple and arched. The ligament is external and narrow. There are two muscle scars which are unequal and subcentral. These animals have two valves, and the soft parts can be completely withdrawn inside the shell.〔 de Bruyne R. H. (2004). ''Encyklopedie ulit a lastur''. Rebo Productions, 336 pp., ISBN 80-7234-288-6, page 223.〕 The two valves are usually thin and translucent. The empty valves of the shells of these animals are in some cases green, in other cases brownish-green or yellow, and in yet others, colorless. The species ''Julia zebra'' has shells that are finely striped with brown and blotched with white. () 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Julia (gastropod)」の詳細全文を読む スポンサード リンク
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