COMPLETE GRAU : PECTINIDAE OF THE EASTERN PACIFIC 41 



[non] Pecten Alaskensis Dall. Whiteaves, 1887, p. 119. Forward Inlet, 

 Quatsino Sound, Vancouver Island, British Columbia, Canada. 

 [ = vancouverensis Whiteaves, fide Whiteaves, 1893, p. 134.] 



Pecten (Pseudamusium) vancouverensis Whiteaves, 1893, p. 133, pi. 1, 

 figs. 1, la. Forward Inlet, Quatsino Sound, Vancouver Island, 

 Brit. Col., Canada. — Woodring, 1938, p. 37. "Apparently ranges 

 from southern Alaska to San Diego in shallow to moderately deep 

 water (12 to 200 fathoms)." 



Pecten (P seudamusium) alaskense Whiteaves. Dall, 1921, p. 20, pi. 1, 

 figs. 4, 5. Bering Sea to San Diego, California. 



Pecten (Pseudainussiuin) pedroanus (Trask) variety vancouverensis 

 Whiteaves. Grant & Gale, 1931 [ex parte], p. 238. [P. arces Dall 

 in synonymy; = Cyclopecten (Delectopecten) randolphi tilla- 

 mookensis Arnold; see that species, this paper. Also incorrectly 

 synonymized : P. (Pseudamusium) vancouverensis fernandoensis 

 Hertlein, 1925b, p. 43, pi. 4, figs. 6, 7 ; a valid species.] 



Pecten (Delectopecten) vancouverensis Whiteaves. Proc. Conch. Club 

 So. Calif., 1944, no. 35, p. 14a. Bering Sea to San Diego, Cali- 

 fornia. 



Delectopecten vancouverensis Whiteaves. Morris, 1952, p. 16, pi. 4, 



fig. 1. 



Holotype: ? 



Type locality : Forward Inlet, Quatsino Sound, Vancouver Island, 

 British Columbia, Canada, in 10-20 fathoms. 



Original description: Shell small, equivalved, compressed lenticular, 

 both valves being equally convex, ovately subcircular in outline apart 

 from the ears and rather oblique ; valves extremely thin and fragile, 

 translucent and almost transparent, pale horn color with a slightly 

 yellowish hue. Beaks placed a little behind the midlength; hinge line 

 straight and very long; ears unequal in size, the posterior pair, which 

 are much smaller than the anterior, alike, indistinctly defined and merg- 

 ing gradually and imperceptibly into the general convexity and marginal 

 contour of that side of each valve; anterior ears large, subtriangular, 

 prolonged laterally and longer than high, distinctly defined, that of the 

 left valve somewhat convex in outline above and concave below, that of 

 the right valve with a deep and acutely angular byssal sinus at its base. 



Surface marked by densely crowded and exceedingly minute, ir- 

 regular and rarely continuous, but on the whole radiating, simple or 

 bifurcating raised lines, also by comparatively large, regularly disposed 

 and distant squamose radii. In the center of each valve the minute and 



