18 



Remar'ks on ClassifiGationa of 





Pfeiffer, 1855. 



Albees, 1860. 





Malak. Blatt. 



Die Heliceen. 





Gen. Helix. 



Gen. Helix. 





Subgenera, 



Subgenera. 



Clarkii Lea 



zzz 



= 



Christyii Bid. 



= 



= 



thyroides Say 



Mesodon 



Mesodon 



bncculenta Gould 



= 



i( 



Wheatleyi Bid. 



= 



— 



exoleta Binn. 



a 



(( 



albolabris Say 



(( 



a 



" var. major Binn. 



". 



^i 



dentifera Binn. 



Ulostoma 



a 



Koemeii Pfr. 



(( 



u 



profunda Say 



u 



u 



Sayii Binn. 



u 



1 



multilineata Say 



Mesodon 



1 



Pennsylvanica Green 



(( 



L" 



clausa Say 



= 



Triodopsis 



Mitcbelliana Lea 



u 



Mesodon 



Downieana Bid. 



~ 



__- 



divesta Gould 



= 



Triodopsis 



barpa Say 

 * 





Acanthinula 



pulcbella Mall. 



Vallonia 



Vallonia 



costata " 





u 



rufescens Penn. 



Hygromia 



Fruticicola 



bispida L. 





({ 



jejuna. Say 



-— 



_i: 



Berlanderiana Moric. 



Galaxias 



■^ 



griseola Pfr. 

 * 



ii. 





fTownsendiana Lea 



Atlanta 



Arionta 



bortensis Miill. 



Is 



Tachea 



Tacbea 



aspersa Mtill. 



Pomatia 



Pomatia 



varians Menke 



Pbaedra 



Polymita 



Sjpeci 



es not Identified, 





H. bulbina Desh. 



H. Ingalb 



jiana Sbuttl. 



egena Say 



porcin 



a Say 



glaphyra Say 



tenuis 



triata Binn. 



