ZONITES. 53 



This is the largest of the English Zonites. It is 

 common everywhere in damp cellars, under stones 

 and logs. 



Var. I. complanata. Rather smaller, spire very flat. 



Var. II. albida. White or colourless. 



Var. III. compacta. Spire more raised, whorls 

 more convex. 



2. Z. ALLIARIUS (smelling of garlic). 

 More convex above, though less so below, than Z. cel- 

 larius; whorls five, the last not so large in proportion as 

 that of the last species; spire slightly produced; mouth 

 narrow ; umbilicus rather wider in proportion than that of 

 the last species ; diameter a quarter of an inch. 



Z. alliarius is rather more local than Z. cellarius, 

 though equally distributed. It has a powerful odour 

 of garlic, but this is not a certain mark of identity, 

 as other species have the same peculiarity. In the 

 north of Ireland, near Coleraine, the variety is very 

 abundant under stones, but I have rarely come across 

 the typical form in that district. 



The umbilicus is wider in proportion to the size of 

 the shell than that of the last species, and the spire is 

 more produced. 



Var. viridula. Greenish white. 



