VERTIGO. 263 



B. Shell sinistral, fusiform : mouth furnished with teeth and 



contracted. 



6. V. pusil'la*_, Miiller. 



V. imsiUa, Milll. Yerm. Hist. pt. ii. p. 124. Pupa pusilla, F. & H. iv. 

 p. Ill, pi. cxxx. f. 8. 



Body oblong, slightly contracted and rounded in front and 

 insensibly narrowing behind, brown or greyish-slatecolonr 

 above, and whitish with a faint tinge of blue on the sides and 

 underneath, minutely tubercled : mantle yellowish-brown : 

 tentacles very close together at their base, but widely diverging, 

 thick, nearly cylindrical, dusky-grey with a slight tinge of 

 brown ; bulbs long, but not very prominent : foot broad and 

 rounded in front, very tumid, keeled and a httle pointed 

 behind. 



Shell subfusiform, with somewhat of a quadrangular out- 

 line, thin and semitrans23arent, very glossy, horncolour with a 

 faint tinge of yellow, very slightly and remotely striate in the 

 line of growth : periphery rounded, with a tendency to angu- 

 larity : epidermis thin : luhorh 4^ or 5, very convex and 

 cylindi'ical, gradually increasing in size ; the penultimate 

 whorl as broad as the last, which occupies about two -fifths of 

 the shell : spire shortish, but rather tapering, and blunt at the 

 point : suture very deep : mouth semioval, contracted or sinuous 

 in the middle of the outer edge ; teeth six or seven, viz. two 

 on the pillar, two on the pillar lip (the inner one of which is 

 always larger, and the outside one tubercular and placed 

 in the angle where the outer lip joins), and two or three within 

 the outer lip (the third, when it is present, placed near the 

 pillar lip and being a mere tubercle) : outer lip rather thick 

 and slightly reflected, strengthened by a strong rib both out- 

 side and inside, which is situate near the opening of the mouth 

 and is yellowish- white ; outer edge rather abruptly inflected : 

 inner lip slightly thickened in full-grown specimens : umbilicus 

 small and narrow, contracted by a rather sharp and gibbous 

 crest or ridge at the base of the shell. L. 0-07. B. 0-045. 



Habitat : Under stones and among dead leaves and 

 moss in woods, in various parts of Great Britain from 

 Westmoreland to Devon, as well as in the North and 



* Little. 



