OF THE NORTHWEST COAST OF AMERICA 11 



Leda fossa Baird, 1863. 



Kotzebue Sound, Alaska, to Puget Sound. 

 Leda fossa, variety sculpta Dall, 1916. 



South of Alaska Peninsula, 69 fathoms. 

 Leda fossa, variety z'aginata Dall. 1916. 



Kasa-an Bay, Alaska, 50 fathoms. 

 Leda fossa, variety curtulosa Dall, 1916. 



Bering- Sea and Unalashka. 

 Leda pontonia Dall. 1889. 



Santa Barbara Islands, Cal., to Peru and the Galapagos 



Islands, in deep water. 

 Leda leonina Dall, 1896. 



Straits of Fuca to Latitude 36° North. 

 Leda amblia Dall, 1905. 



Monterey Bay, Cal. 

 Leda conceptionis Dall, 1896. 



Aleutian Islands to San Diego, Cal. 

 Leda gomphoidea Dall. 1897. 



Off Tillamook, Oregon, 786 fathoms. 

 Leda extenuata Dall, 1897. 



Off Sitka, Alaska. 1569 fathoms. 

 Leda spargana Dall. 1916. 



Santa Barbara Islands to Point Loma. Cal. 

 Leda fiascona Dall. 1916. 



Off San Diego. Cal.. in 822 fathoms. 

 Leda phenaxia Dall, 1916. 



Off San Diego, Cal., in 822 fathoms. 

 Leda Dalli Krause, 1886. 



Unalashka, Aleutian Islands. 



Genus Yoldia Moller, 1842. 

 Section ]\Iegayoldia A^rrill, 1897. 



Yoldia thraciasformis Storer, 1838. 



Arctic Ocean to Oregon. Also Atlantic. 

 Yoldia secunda Dall, 1916. 



Southeastern xVlaska, in deep water. 

 Yoldia beringiana Dall, 1916. 



Bering Sea to Anacapa Island, Cal. 

 Yoldia montereyensis Dall, 1893. 



Chirikoft' Island, Alaska, to San Diego, Cal. 

 Yoldia martyria Dall, 1897. 



Kasa-an Bay, Alaska, to Gulf of California. 

 Yoldia vancouverensis Smith, 



Vancouver Island (Smith). 



