OF CONCHOLOGY. 239 



H. Lohrii, Gabb. Cerros Island, west of 6, is the habitat of 

 H? Veatchiana, (Newc), the most northern of the peninsular 

 group, resembling Polymita. 



d. — H. Stearnsiana, typical form. 

 d. c. — The same, approaching Kellettii. 



e. — H. Kellettii, a form much larger than type, found on 

 Catalina Island. 



e. — H. rufocincta, the only locality. 



e.f. — II. Gabbii, extending to Clemente Island. 



/. — H. crebristriata, only locality. 



g. — Binneya NOTABILIS, only locality Barbara Island. 



g. h. — H. Tryoni, extending to Nicolas Island. 



/. g. h. — H. facta, the/, form aberrant. 



i. — H. Ayresiana, only locality known. 



y. — II. intercisa, ? probably not " Oregon." 



k. I. m — H. Traskii. 



c. m.n. — EL tudiculata ; the broken line towards the north 

 indicates the out-crops of limestone along the Sierra, extending 

 to p. 



o. — H. Hillebrandi, only locality. 



o. p. — H. Mormonum, at intervals on the limestone belt. 



q. — T. loricata, at the middle of the Sierra, and probably 

 passing around the Sacramento Valley to the coast at r, thence 

 south to s. 



s. t. — H. exarata, range very limited. 



t. — H. sequoicola, " " 



U. — H. DUPETITHOUARSI, " 



m. v. — II. REDIMITA, probably passing around Monterey Bay 

 to San Francisco Bay, and north to r. 



v. w. — II. DiABLOENSlS, ? range unknown. 



w. m. — H. Carpenteri, supposed range. 



v. x. — H. infumata, to black var. of fidelis. 



t. x. — II. arrosa, (not quite to) lat. 40°. 



s. x. — H. Nickliniana, doubtful toward the north, becoming 

 bandless between x and r. Var. Bridgesii at v. 



v. s. — II. ramentosa, confined to the vicinity of San Fran- 

 cisco Bay, chiefly near v. 



y. — M. Voyana, only locality known. 



x. z. — II. FIDELIS, east to Cascade Mts. 



