212 



THE CHICAGO ACADEMY OF SCIENCES. 



Co., Cal., and Lower Cal. ; Oakland and West Berkeley, Alameda Co.; Fulton, 

 Sonoma Co. (Hemphill) ; San Francisco, San Francisco Co. (Gabb; Hemphill; 

 Lea; Raymond; Rowell; Stearns; Tryon) ; San Diego Co. (Roper); Merced 

 Lake, Merced Co. (Smith. Coll.) ; Sausalito, Marin Co.; Alameda Co. (Stearns) ; 

 San Luis Obispo Co.; Alameda Co. (Orcutt; Walker). 



OREGON: Johnson's Creek, Portland, Multnomah Co. (Benedict); Port- 

 land (Ferriss) ; Oregon (Lea; Nuttall) ; East Portland (Walker). 



WASHINGTON : Vancouver (Gabb) ; Seattle, King Co., in greenhouse (Ran- 

 dolph) ; Columbia River, near Vancouver, Clarke Co. (Smith. Coll.) ; Grand 

 Coulee, Blue Lake, Douglas Co. (R. S. Snodgrass). 



Distribution 



of/ 

 BULIM01DES 



FIG. 16. 



BRITISH AMERICA. 



BRITISH COLUMBIA: Victoria, Victoria District, Vancouver Island (Phila. 

 Acad.). 



GEOLOGICAL DISTRIBUTION : Unknown. 



ECOLOGY: Not recorded. Shells believed to be this species have 

 been found at the outlet of Lake Tahoe, California, at an altitude of 

 6247 feet. 



ANIMAL, JAW, RADULA and GENITALIA: Not examined. 



