62 Natural History Bulletin. 



The diameter of the shell and also of the whorls is so much 

 greater than in any of the recent specimens examined by us 

 that it may be necessary to separate this as a distinct species. 



Subg-e tins Conuhis. — Filz. 

 C FULVus. — Draf. 



Quite common under leaves and logs in moist woods. A 

 fossil, larger than the recent form, occurs in the Llvss. 



Stibgenus Helicodisciis. — JSIorse. 

 H. LiNEATUs. — Say. 



Quite common in moist (low or high) places under sticks 

 and leaves. Also fossil in the Loess. 



Subgenus Punctiim. — Morse. 



P. PYGMM^UM. — Draf. 



This, the most minute of our niolltisca^ is not uncommon un- 

 der pieces of bark and wood in moist, high places. 



It is often mistaken for the young of other species but a close 

 examination soon reveals its well-marked characters. 



FAMILY— SELENITIDiE. 

 Genus Selenites. — Fischer^ {Macrocyclis\ 

 S. CONCAVA. — Say. 



Quite common on shaded, rocky hillsides. Very common 

 with Helicina occulta. Say, on which it feeds, the animal be- 

 ing secured by rasping through the body-whorl just back of 

 the operculum. 



The dentition of this group should separate it from the fam- 

 ily ZonitidcB. Fischer proposes the family Sehnitidce for its 

 reception. 



FAMILY— HELICIDiE. 



Genus Helix. — L. 



Subgenus Patula, — Hald. 



P. ALTERNATA. Say. 



This gregarious species is very common under boards, logs, 

 stones, etc. 



