VITRINA. 31 



or upper and lower surfaces, not circular, but semi- 

 oval. Whorls three and a half, rapidly enlarging, simply 

 and moderately convex ; the spire scarcely elevated, 

 ending obtusely. Body very large in proportion, filling 

 about five-sixths of the length, rather broadly rounded 

 at the periphery ; the convex curvature of its surface 

 more abruptly declining below than above. Mouth lu- 

 nate-oval, rather broader than it is long, capacious, usually 

 occupying two-thirds of the height, four-sevenths of the 

 breadth, and almost half the central area. Outer lip very 

 greatly projecting, simple, acute, arched, sloping down 

 and leaning over above, subarcuated and vastly receding 

 below. Pillar lip thin, slanting so as to form a con- 

 tinuous curve with the basal edge, very briefly reflected at 

 the axis, but not forming a distinct perforation. Length 

 an inch and three quarters ; breadth three inches and a 

 quarter. 



In the broad yellow variety, the spire is pre-eminently 

 depressed, and the mouth peculiarly ample ; in the less 

 pellucid pea-green variety the contrary conditions more 

 frequently prevail. 



The animal is usually only partially retractile, of a 

 bluish grey colour, sometimes tinged with yellow ; two 

 pale violet lines run down the rather short upper ten- 

 tacula and along the neck, but soon fade away. The 

 lower tentacles are short and slightly violet. The mantle 

 is reflected on the lip of the shell, and behind, beneath 

 the spire, has a lobe-like process. The tail projects be- 

 hind the shell, and is suddenly and obliquely truncated. 

 This pretty little snail is common in all parts of the 

 country, among moss, under stones, &c. 



Note. — Turton having obtained a shell which he supposed to be the Helix 

 hrevipes of Drapaniaud's " Mollusques," copied the figure (Manual L. and F. W. 



