Publisher's Synopsis
Excerpt from A History of British Mollusca, Vol. 3: And Their Shells
Shell hemispherically ovate, oblique, imperforate, with a. Spire of few whorls, last whorl very large; columella ?attened, smooth, or slightly denticulated, forming a nearly straight sharp-edged border to the inner side of the hemispherical mouth; surface smooth, or striated, or spi nous, protected by an epidermis; operculum obliquely Innate, solid, corneo-calcareous, with a tooth on its lower margin.
Animal with two slender tentacula, with detached eye bearing sus-tentacula at their external bases. Foot rather short, triangularly oblong. Structure of the tongue (as observed by Loven) complicated; each transverse series of teeth has a. Minute central denticle, ?anked by three laterals, of which the first is largest, transversely -ex panded and laminar, the second and third minute, and bounded by numerous uncini, the first of them very large, broadly hooded and denticulated, the remainder narrow and linear.
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