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Shelled slug
The shelled slug, scientific name ''Testacella haliotidea'', is a rarely seen, air-breathing, carnivorous land slug, a terrestrial gastropod mollusk in the family Testacellidae, the shelled slugs. 〔 Marshall, B. (2014). Testacella haliotidea Lamarck, 1801. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=819973 on 2014-11-06 〕
==Description==
This slug, like others in the family, has a small shell, which is situated towards the rear of the animal. The species epithet is ''haliotidea'' because the shell of this species resembles in shape a miniature version of the shell of the marine species in the family Haliotidae, the abalones.
This is a large, very agile, pale brown slug, with a length of 12 cm. It has a small ear-shaped, external shell, less than 1 cm long, at the tail end of the mantle.
The following shell description is modified from Tryon 1885. The shell is oval-auriform, depressed, and rugosely striate. It has a thin, readily deciduous epidermis. The apex is minute, very short and not separated from the columellar margin. The aperture is rounded and usually dilated anteriorly; the columella and the outer margin of the aperture form a distinct angle at their junction. The interior of the shell is whitish and pearly. The length of the shell is 6-10 mm.〔George Washington Tryon: ''(Manual of conchology; structural and systematic. With illustrations of the species. Second series: Pulmonata, volume 1 )''. - 1885, Philadelphia, page 10.〕
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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