67 



Circumboreal — Finland to Spain and New Jersey — Alaska 

 — Asia? 



878 Littorina sitkana Philippi. 



Sitka, Alaska, to Monterey, Cal. Japan. 



Aleutian Islands, Alaska (R. E. C. Stearns), banded variety. 



879 Loligo stearnsii Hemphill. 

 San Francisco bay, California. 



880 Lucina bella Conrad. 

 Monterey to Galapagos Islands. 



881 Lucina borealis Linne. 



Circumboreal? — Finland to Mogador, Africa — Alaska to Cata- 

 lina Island, California? 



882 Lucina filosa Stimpson. 



Arctic sea to West Indies — Patagonia — Vanvouver Island — 

 Circumaustral? 



883 Lucina tenuisculpta Carpenter. 



Vancouver Island, British Columbia, to Catalina Island, Cali- 

 fornia — Mazatlan?, Mexico. 



884 Macoma calcarea Chemnitz. 

 Nearctic? — Greenland — Vancouver Island. 



885 Macoma carlottensis Whiteaves. 

 Queen Charlotte and Vancouver Islands. 



886 Macoma edentula Broderip. 

 Arctic sea to Straits of Fuca — Japan. 



887 Macoma edulis Nuttall. 



Straits of Fuca to Balenas bay, California. 



888 Macoma expansa Carpenter. 

 Straits of Fuca — Greenland? 

 Synonym of Macoma lata Desh. 



889 Macoma obtusa Carpenter. 

 Vancouver Island to San Diego, Cal. 



890 Macoma sabulosa Spengler. 

 Greenland to Vancouver Island. 



891 Mactra ealifornica Conrad. 

 Straits of Fuca to San Pedro, Cal. 



892 Mangilia bicarinata Couthouy. 



Circumboreal — south to Rhode Island, and Alaska — Northern 

 Europe. 



893 Mangilia crebricostata Carpenter. 

 Straits of Fuca, Washington. 



894 Mangilia funebrale Dall. 

 Sitka, Alaska. 



895 Mangilia hemphilli Stearns. 

 San Diego and southward. 



896 Mangilia hexagona Gabb. 

 Monterey to Catalina Island, California. 



897 Mangilia interfossa Carpenter. 

 Vancouver Island to Neeah bay, Washington. 



898 Mangilia levidensis Carpenter. 



Straits of Fuca to Bodega bay, California. 



899 Mangilia merita Gould. 



Southern California to Central America. 



900 Mangilia sculpturata Dall. 

 Vancouver Island and north. 



901 Mangilia striosa C. B. Adams. 

 San Pedro, Cal., to Panama. 



902 Margarita canfieldi Dall. 

 Monterey to San Pedro, Cal. 



903 Margarita helicina 0. Fabricius. 

 Circumboreal — south to latitude 49 degrees. 



