76 HELICID.E. 



land). The varieties are equally common with the 

 type. 



Var. I. bizona. Two dark bands on the body whorl. 



Var. II. inflata. More tumid, shorter, streaked 

 with brown, or marked with a single band. 



2. B. MONTANUS (inhabiting mountains). 



Globosely conic, slightly glossy, light brown; whorls 

 seven and a half ; spire tapering, but blunt ; Up white, re- 

 flected ; umbilicus narrow, but deep. Immature specimens 

 are keeled. 



This is a local shell, being confined to the southern 

 and western counties of England. It has a habit of 

 ascending the ash and the beech in the spring, pre- 

 sumably to feed and pair, descending in the autumn 

 to hibernate. 



3. B. OBSCURUS (hidden). 



Of the same shape as the last species, but much smaller, 

 rather shorter in proportion, and more glossy ; transparent 

 horn-colour ; whorls six and a half. 



The name obscurus was given to this shell in con- 

 sequence of its habit of covering itself, by means of its 

 slime or an exudation of the epidermis, with earth or 

 any substance it comes in contact with, thus rendering 

 itself inconspicuous. In some districts, where the ex- 



