32 



Remarks on Classifications of 



lasmodon Phill. 



interna Say 

 multidentata Binn. 

 lineata Say 



f polygyrella Bid. & Coop. 



labyrinth ica Say 

 Hubbardi Brown 



fVanconvcrensis Lea 



var. sportella Gould. 

 con cava Say 



minuscula Binn. 

 milium Morse 

 minutissima Lea 

 vortex Pfr. 

 incrustata Poey 



asteriscus Morse 

 exigua Stimp. 

 perspectiva Say 

 fstriatella Anthon. 

 alternata Say 

 Cumberlandiana Lea 



" var. mordax Shutt. 

 fstrigosa Gould 

 fCooperi W. G. Binn. 

 fsolitaria Say 



cereolus Mulhf. 



Carpenteriana Bid. 



septemvolva Say 



" var. volvoxis Parr. 

 * 



Texasiana Moric. 

 triodontoidcs Bid. 

 Hindsi Pfr. 

 ventrosula Pfr. 



oppilata Mor. 

 auriformis Bid. 



Pfeiffer, 1855. 

 Malak. Blatt. 



Gen. Helix. 



Subgenera. 



Actinaria 



Mesodon 



Macrocyclis 



Hvalina 



Patula 



Polygyra 



Daedalochcila 



Ulostoma 

 Daedalocheila 



Albees, 1860. 

 Die Helieeen. 



Ge\. IIyalina. 

 Subgenera. 

 Gastrodonta. 



Macrocyclis (Gen.J 

 Patula (Helix) 

 Macrocyclis (Gen.) 

 Genus Helix 

 Subgenera 

 Microphysa 



Patul; 



Polygyra 



