10 RECENT BIVALVE MOLLUSKS 



Nucula sp. 



Bering- Sea. 1401 fathoms. 

 Nucula exigua So^verb3^ 1832. 



Golden Gate to Acapulco. 

 Nucula carlottensis Dall, 1897. 



- Queen Charlotte Islands to Anacapa Island. 



Sjibgciiiis Acila H. and A. Adams, 1858. 



Acila castrensis Hinds, 1844. 



Bering Sea to San Diego, Cal. 



Fcniiily Ledidse 

 Genus Leda Schumacher, 1817. 



Leda taphria Dall, 1897. 



Bodega Bay, Cal., to Lower California. 

 Leda cellulita Dall, 1896. 



Puget Sound. 

 Leda acuta Conrad, 1832. 



Nazan Bay, Atka Island. Aleutians, to Gulf of California. 



Also Atlantic. 

 Leda minuta Fabricius, 1776. 



Arctic Ocean to San Diego, Cal. Also Atlantic. 

 Leda navisa Dall, 1916. 



Farallones Islands to San Diego, Cal. 

 Leda amiata Dall, 1916. 



Off San Diego in 488 fathoms. 

 Leda penderi Dall, 1910. 



Queen Charlotte Islands to Santa Barbara Islands. 

 Leda buccata Steenstrup, 1842. 



Arctic Ocean, and Bering Strait. Also Atlantic. 

 Leda hamata Carpenter, 1864. 



Puget Sound to Panama Bay. 

 Leda hamata, variety liniafa Dall, 1916. 



Santa Barbara to San Diego, Cal. 

 Leda oxia Dall, 1916. 



Santa Rosa Island, Cal.. to Gulf of California. 

 Leda liogona Dall, 1916. 



Bering Sea in 1401 fathoms. 

 Leda pernula Mtiller, 1779. 



Arctic Ocean to Plover Bay. Also Atlantic. 

 Leda radiata Krause, 1886. 



Arctic Ocean : Plover Bay, Eastern Siberia ; Okhotsk and 



Bering Seas. 



