1889.] NATURAL SCIENCES OF PHILADELPHIA. 205 



191. Helix binominata Tryon. (Trio, hemphilli W. G. B. 



preoc.) Northern Idaho. 



192. Helix sanburni W. G. Binn. Northern Idaho. 



193. Helix salmoxexsis Tryon. (Trio, harfordiana W. G. B. 



preoc.) Idaho. 



194. Helix loricata Gld. California. 



195. Helix roperi Pilsbry. Redding, California. 



196. Helix levettei Bid. New Mexico ; Arizona. 



i Section Polygyra Say, 1818.) 



197. Helix auriculata Say. Florida. 



197a. Helix auriculata microforis Dall. Alachua Co., Fla. 



198. Helix uyulifera Shntt. Gulf Coast, Florida to Texas. 



199. Helix postelltana Bid. South Carolina to Florida. 



200. Helix auriformis Bid. Florida to Texas ; Indian Ter. 



201. Helix espiloca Rav. South Carolina to Texas. 



202. Helix avara Say. Florida. 



203. Helix leporina Gld. Illinois to Texas and Georgia. 



204. Helix pustuloides Bid. Georgia ; Alahama ; Tennessee. 



205. Helix pustula Fer. South Carolina to Florida ; Texas ? 



206. Helix fastigaxs L. W. Say. Tennessee ; Kentucky. 



207. Helix troostiana Lea. Tennessee ; Kentucky. 



208. Helix jacksoxi Bid. Indian Ter. ; Southern Missouri ; 



Arkansas (Florida ?). 

 208a. Helix jacksoni deltoidea Simpson. Indian Territory. 



209. Helix dorfeuilliana Lea. Kentucky to Alabama, 



Missouri to Indian Ter. and Texas. 

 209a. Helix dorfeuilliana sampsoni Wetherby. Arkansas. 



210. Helix hazardi Bid. Tenn. and Ala. to Ark. 



211. ? Helix oppilata Moric. Florida Keys. 



212. Helix mooreana \Y. G. Binn. Texas. 



212a. Helix mooreana tholus \Y. G. Binn. Texas. 



21 3. Helix texasiana Moric. Texas ; Indian Ter. 



214. Helix triodontoides Bid. Indian Ter. ; Texas. 



215. Helix vextrosula Pfr. Southern Texas. 



216. Helix hindsi Pfr. Southern Texas. 



217. Helix ariadnje Pfr. Southern Texas. 



