84 HELICID^E. 



minute species in Ireland. In December, 1883, I 

 found a single live specimen near Coleraine. As I 

 was doubtful of its being actually alpestris, I sent it 

 to Dr. Jeffreys, who kindly confirmed my opinion as 

 to its identity. It is found, though rarely, in some 

 of the northern counties of England. 



6. Y. SUBSTRIATA (slightly striated). 



Ovate, thin, semi-transparent, glossy, very strongly and 

 obliquely striate in the iine of growth ; whorls four and a 

 half, cylindrical ; spire very abrupt ; suture remarkably 

 deep ; mouth semi-oval, outer margin constricted ; teeth 

 five to six (two or three on the body, one or two on the 

 columella, two inside the outer lip) ; umbilicus small. 



This pretty little shell is found in many parts of the 

 British Isles in moist situations at the roots of grass 

 and under stones. Its strong striations, almost amount- 

 ing to ribs, serve to distinguish it from any of the pre- 

 viously mentioned species. 



B. SlNISTRAL. 



7. Y. PUSILLA (minute). 



Fusiform, very glossy, thin, horn- col our ; whorls four and 

 a half; spire more tapering than that of most members 

 of the genus ; very slightly striate in the line of growth ; 

 mouth semi-oval, constricted in the outer margin, which is 

 rather thick ; whorls four and a half to five ; teeth six to 



