VERTIGO. 163 



Shell oval or subcylindrical, moderately thin, semitransparent, 

 glossy, light yellowish horn-colour, with strongly defined slanting 

 transverse striae, which are less distinct on the body whorl, 

 where they are intersected by a few very fine spiral lines ; 

 periphery rounded ; epidermis moderately strong ; whorls 4!, 

 very much swollen ; spire short and abrupt, apex obtuse ; 

 suture very deep ; mouth forming about half of an oval, but 

 there is a sinuation in the middle of the outer margin ; teeth 

 usually six, two on the base of the penultimate whorl, one, or 

 sometimes two, on the pillar, and two or three inside the outer 

 lip ; outer lip thin, slightly reflected and strongly ribbed near 

 the aperture ; inner lip thickened ; umbilicus small, contracted 

 by a basal ridge. 



Inhabits many parts of Great Britain and Ireland, 

 in damp woods and marshy places, at the roots of 

 grass, among dead leaves, and under stones. 



The minute black specks which occupy the place of 

 lower tentacles in V. pygmcea are altogether wanting 

 in this species. 



B. Shell sinistral, spindle-shaped ; month provided 

 with teeth and contracted. 



6. V. PUSIL'LA,* MULLER. PL. IX. 



Body brownish, or greyish slate-colour above, grey slightly 

 tinted with blue below, tubercles small and round ; mantle 

 yellowish-brown ; tentacles nearly cylindrical, dark grey tinged 

 with brown, thick, especially at their base, indistinctly granu- 

 lated, considerably diverging, except at their base, where they 

 nearly touch each other, bulbs long and rounded at the tips ; 

 foot pale greyish-brown, broad, keeled, and slightly pointed 

 behind. 



Shell somewhat spindle-shaped, thin, semitransparent, glossy, 

 pale yellowish horn-colour, with faint and wide-apart transverse 



* Small. 



M 2 



