CLASSES, ORDERS, ETC. 89 



teeth ; umbilicus rather deep, narrow. Height y^th inch. 

 Under stones and logs of wood. Moderately common. 



V. pygmcea. 87 



(e) Shell somewhat like that of V. pygmcea but differing in 

 being more cylindrical, lighter in colour, more strongly striated, 

 and in the absence of any rib. Among grass and dead leaves in 

 the northern counties. Local. V. alpestris. 



(/) Shell dextral, shortly ovat^ glossy, thin, light yellowish-horn 

 colour; whorls four and a-half, very ventricose, with the spire 

 very short and abrupt ; suture very deep ; mouth sub-pyriform 

 with six teeth ; umbilicus small, contracted by a basal ridge. 

 Height ^-ths inch. Among grass, dead leaves, and under stones. 

 Moderately common. V. substriata. 



(g) Shell dextral, ovate, cylindrical, pale brownish-horn 

 coloured; whorls five to six and a-half; spire conical, blunt; 

 mouth subsemi-oval, without teeth ; umbilicus narrow, rather deep. 

 Height ^th inch. Among moss and dead leaves, under stones. 

 Local. V. edentula. 



(ti) Shell dextral, cylindrical, glossy, horn-colour, narrower and 

 smaller than V. edentula ; whorls five and a-half, increasing in size 

 to the third, and then becoming of the same breadth ; suture 

 deepish ; mouth oblong, without teeth ; umbilicus narrow, oblique. 

 Height ^gth 5 inch. Under stones on hillsides. Very local. 



V. minutissima. 



(i) Shell sinistral, somewhat fusiform, glossy, thin, pale yellowish- 

 horn colour ; whorls four and a-half to five, ventricose ; suture 

 deep ; mouth subquadrate, with six or seven denticles ; umbilicus 

 small, contracted by a basal ridge. Height -^g-ths inch. Among 

 moss and decayed leaves, under stones. Very local. V. pusilla. 



(/) Shell sinistral, fusiform, pale horn-colour, glossy, smaller 

 and narrower than V. pusilla ; whorls four and a-half, the pen- 

 ultimate whorl being the largest ; suture deepish ; mouth trian- 

 gularly subcordate, with from four to five denticles ; umbilicus 

 small, contracted by a basal ridge. Height -/Qths inch. At the 

 roots of grass. Extremely local. V. angustior. 



22. Balia. Shell sinistral, elongated, thin; mouth ovate, 



pallida, thinner, lighter in colour. 



