46 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Type locality, Unalaska, Aleutian Islands. 
Range. Aleutian Islands to Fuca Strait. 
Gastropteron (pacificum Bergh var. ?) cinereum Dali, 1925 
Canadian Arctic Expedition , 1913-1918, 1925. 
The North Atlantic, Asiatic, and North Pacific species of Gastropteron 
are all of a reddish color sprinkled densely with darker red dots. The 
present species is of a uniform dusky slate color and of a smaller size than 
the Pacific species described by Bergh. It is an interesting addition to 
the sparse list of known species. The spread of the parapodia (footwings) 
totals 10 to 15 mm., the length of the body 8 to 11 mm. (in spirits; in the 
living state it was probably larger). The anterior shield is about one- 
third the whole length of the body. Like G. pacificum, it lacks a posterior 
flagellum on the mantle. (Dali.) 
Type in Museum at Ottawa. Type locality, Skidegate Inlet, Queen 
Charlotte Islands, British Columbia. 
Range. Queen Charlotte Islands to Vancouver Island, British Colum¬ 
bia. 
Family AGLAJIDAE 
Genus AGLAJA Renier, 1804 
Head-shield without rhinophores or frontal process. (Tryon and Pils- 
bry, Manual of Conchology.) 
Type. Doridium membranaceum Meckel. 
Distribution. Mediterranean, east coast of Africa, Australia, New 
Zealand, Kadiak Island, Alaska, to Catalina Island, California, Japan, 
Hawaiian Islands, West Indies. 
Aglaja purpurea Bergh, 1894 
Bulletin, Museum of Comparative Zoology, 25: 209; PI. 12, fig. 7. Tryon and Pilsbry, 
Manual of Conchology, 16:52; PI. 13, fig. 78. 
Living animal blackish-purple. Much contracted individual in alcohol 
is dark brownish, almost black in color, on the anterior shield; the hind 
body dirty reddish-brown; both quite finely punctate with yellow. The 
sides of the body as well as the lower half of the upper side of the foot- 
wings (parapodia) yellowish-brown, while the upper half of the parapo- 
dium is paler and vertically striated, as is also the hind half of the upper 
side of the tail. Gills dirty yellow; the hind wings of mantle quite black, 
finely punctate with yellow and with lighter margin. Entire under surface 
of animal, with the outer (under) side of the parapodia black, finely 
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