50 



596 Vitrinella alaskensis 



Type locality: — Unalaska, Alaska (Dall). 



597 V. (Docomphala) Stearnsi 

 Type locality: — Monterey, Cal. 



598 V. (Docomphala) berryi 



Type locality: — Off Del Monte, Monterey bay, Cal. (S. S. 

 Berry). San Diego, Cal. (Mrs. Oldroyd). 



599 Cyclostrema xantusi. Cape San Lucas. 



600 Cyclostrema diegensis 



Type locality: — San Diego, Cal. 



601 Circulus cosmius. Ecuador. 



602 Circulus cerrosensis. Off Cerros Island. 



603 Cyclostremella californica 



Type locality: — Long Beach, Cal. (Mrs. Oldroyd). Monterey, 

 Cal. (Berry). 



604 Scissilabra dalli 



Type locality: — San Diego. Also from San Pedro, Cal.; Mon- 

 terey, Cal. 



605 Cooper, J. G.: 



Catalogue of west North American and many foreign shells, 

 with their geographical ranges. Printed for the state mining 

 bureau of Cal., April, 1894. This catalog included all mollusca 

 known at that time to inhabit West America from Sitka to Cape 

 San Lucas. Numbers 606-1139 are herewith incorporated, as fol- 

 lows: 



606 Acanthinula harpa Say. 



Circumboreal? — south to Maine, Sweden, Siberia, (Alaska?) 



607 Acanthochites avicula Carpenter. 



Catalina Island, Cal. — 20 fathoms. Monterey, Cal. 



608 Acantopleura tluxa Carpenter. 

 Catalina and Santa Barbara Islands, Cal. 



609 Acila castrensis Hinds. 



Sitka, Alaska, to San Diego, Cal. Puget Sound, 8 fms. (F. L. 

 Button. 



Synonymy: — Nucula castrensis. 



610 Acmaea at rata Carpenter. 



Margarita bay to Cape St. Lucas, Baja Cal. 



611 Acmaea dalliaiia Pilsbry. 

 Gulf of California. 



612 Acmaea fascicularis Menke. 



Margarita bay, Lower California, to Gulf of California. 



613 Acmaea instabilis Gould. 



Vancouver Island to Monterey, Cal. Sitka, Alaska. 



614 Acma?a mesoleuca Menke. 



Gulf of California (to Panama?) Masatlan. 



