148 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



Near Sitka: On Saxidomus; Sylvamis Bailey; 1 male, 1 female 

 ovig. (17955). June 13, 1880; W. H. Dall; 1 male, 2 females (17954). 



Cordova Bay, Prince of Wales Island, Alaska; in pairs in gill- 

 chambers of giant clams; June IG, 1897; steamer Albatross; 8 males, 9 

 females (8 ovig.) (48431). 



Beaver Harbor, British Columbia ; in shells of Schisothaerus nut- 

 tallii; July 12, 1888; steamer Albatross; G males, 10 females (2 ovig.) 

 (48432). 



Victoria, British Columbia; C. F. Newcombe; 1 male, 1 female 

 ovig. (15804). 



Departure Bay, British Columbia ; in BIya arenaria; George W. 

 Taylor; 1 female y. (39128). 



Ucluelet, British Columbia; in Mya arenaria; Geological Survey of 

 Canada; 1 male, 1 female y. (40399). 



Denman Island, British Columbia; in clams; May 12, 1914; 

 steamer Albatross; 6 males, 12 females (5 ovig,, 7 immat.) (48427). 



Union Bay, Vancouver Island, British Columbia: In Saxidomus^ 

 probably giganteus; Apr. IG, 1914; steamer Albatross; 24 males, 22 

 females, all young (boiled) (48433). East of coal wharf; May 27, 

 1911; steamer Albatross; 1 female ovig. (49255). 



British Columbia; 191G; C. McLean Fraser: Hammond Bay; in 

 Mya arenaria; May 20; G8 males and females, all young (49G12). 

 Near Biological Station, Departure Bay; in Scldzothaerus; May IG; 

 1 male, 1 female (49G13). North shore. Departure Bay; in Mya; 

 May 30; IG males and females, all young (49G14). Brandon Island; 

 in Schizothaerus ; May 18; 3 males, 2 females ovig., all light-col- 

 ored (49G15). Kanaka Bay; on Mya; May 29; 35 males and fe- 

 males, all young (4961G). Protection Island; May 29; 2 males, 1 

 female, on Sehizothaerus (49629) ; 124 males and females (all but 2 

 are immature), in Mya (49G17). Echo Bay, Newcastle Island; May 

 30; 5 males, 4 females (3 ovig.), in Schizothaerus (49618) ; 30 males 

 and females (only one is mature), in BIya (49619). Snake Island; 

 in Mya; May 22; 32 males and females, all young (49620). Taylor 

 Bay; Apr. 5; 3 males, 5 females (4 ovig.) in Schizothaerus (49621) ; 

 13 males and females, all young, in Mya (49622). Taylor Bay; May 

 17; 1 male, 1 female, in Schizothaerus (49630) ; 33 males and females, 

 all young, in Mya (49623). South side of Mudge Island; in Schizo- 

 thaerus; May 31; 45 males, 39 females (34 ovig.) (49624). S. E. end 

 of Mudge Island ; in BIya; May 31 ; 24 males and females, all young 

 (49625). False Narrows; on Schizothaerus; May 19; 9 males, 7 fe- 

 males (4 ovig.) (49626). 



Friday Harbor, Washington ; 1916 ; Evelyn D. Way : July G and 

 11; found in shells of Blacoma nasuta, BIya arenaria and cockles; 

 3 males (49950). July 15; in mantle of a big horse clam; 1 male, 1 

 female (49949). 



