1889.] NATURAL SCIENCES OP PHILADELPHIA. 201 



Genus xvii. HELIX Linne, 1758. 



Subgenus HELIX (restricted). 



(Group Pentataenia A. Schm.) 



(Section Pomatia Beck. 1837.) 



[109.] Helix aspersa Miill. Charleston S. C, New Orleans ; 



Santa Barbara, Cal., etc. 



(Section Tachea Leach, 1840.) 

 [110.] Helix nemoralis Mull. Lexington, Va,; Burlington, N. J. 

 [110a.] Helix nemoralis hortensis Linn. Newfoundland to 

 Cape Cod, along the Coast. 



(Group Arianta Leach, 1840.) 

 (Section Lysinoe H. and A. Ad., 1855.) 



111. Helix fidelis Gray. Northern Cal. to Vancouver Id. 

 Ilia. Helix fidelis infumata Gould. Coast of Cal., from 



Marin Co. to Mendocino Co. 



112. Helix townsendiana Lea. Oregon. 



113. Helix arrosa Gonld. Santa Cruz to Mendocino Co., Cal. 



114. Helix exarata Pfr. Santa Cruz to Marin Co., Cal. 



115. Helix californiensis Lea. Monterey, Cal. 



115a. Helix californiensis nickliniana Lea. Santa Cruz to 

 Mendocino Co., Cal. 



115b. Helix californiensis anachoreta W. G. B. Cal- 

 ifornia. 



115c. Helix californiensis ramentosa Gould. Napa Co. to 

 Santa Clara Co., Cal. 



115d. Helix californiensis bridgesi Newc. San Pablo, Cal. 



115e. Helix californiensis diabloensis J. G. Coop. Near 

 San Francisco, Cal. 



116. Helix tudiculata Binney. San Diego to Ventura Co., 



and Merced, Tuolumne and Calaveras Cos., Cal. 



117. Helix dupetithouarsi Desh. Monterey, Cal. 



118. Helix traski Newcomb. Los Angeles to Ft. Tejon and to 



San Luis Obispo. 



119. Helix sequoicola Cooper. Santa Cruz Co., Cal. 



120. Helix mormonum Pfr. Fresno Co. to Klamath Lake, 



Cal. 

 120a. Helix mormonum circumcarinata Stearns. Stanislaus 

 Co., near Turlock, Cal. 



