OP OONOHOLOGY. 329 



H. cliersina, Say. Middle States, Northern States general- 

 ly, (Auct.) Massachusetts; Illinois; Marquette, Mich- 

 igan; Stuart's Island, Norton Sound; Petropavlovsk, 

 Kamschatka, (Dall.) Lake Tahoe, Oal., (J. G, Cooper.) 

 Red River district, (R. Kennicott.) Mantchooria, (Mid- 

 dendorf.) 



jr. Whitneyi, Newc. Lake Tahoe, Cal., (Prof. Brewer.) 



H. Breweri, Newc. Lake Tahoe, Gal. ; Northern Cal., (Prof. 

 Brewer.) 



H. Duranti, Newc. Santa Barbara Island, Cal., (State Geol. 

 Survey.) 



H. Cronhhitei, Newc. [^1 striatella^ (west of Rocky Moun- 

 tains,) Bid., non Anth.] Klamath Valley, Oregon, 

 (Gabb and Cronkhite.) Haywards, Alameda Co., Cal., 

 (var.,) (Rowell.) 



JS. conspecta, Bland, Near San Francisco^ (J. G. Cooper.) 



H. electrina, Gould. Petropavlovsk, Kamschatka, (Dall.) 

 Red River, (Kennicott.) Illinois ; Marquette, Michigan ; 

 Massachusetts, (Dall.) 



H. cherainella, Dall, "Big Trees," Calaveras Co,, California, 



I am indebted to Dr. Wesley Newcomb for the privilege of 

 describing this shell, which agrees with no other in his large 

 and well-named collection. 



