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University of California Publications in Zoology  [Vou.14 
Paphia staminea Conrad var. petiti (Deshayes) 
Venerupis petiti Deshayes (1839). 
Tapes diversa Sowerby, Wood and Raymond (1891), p. 55. 
Papia staminea var. Petiti, Dall (1902a), p. 398. 
Description.—The following is Dall’s (1902a) description of this variety: 
**. . . yellowish, chalky white or dull gray color without maculations, sculp- 
ture markedly separated into areas.’’ 
This variety has been reported from this region by several col- 
lectors. According to Dall (1902, p. 398) im its northern form being 
common north of the Columbia River. 
Range—Aleutian Islands to San Quentin Bay, Lower California 
(Dall). 
Paphia tenerrima (Carpenter) 
Plate 22, figures la and 1b 
Lapes tenerrima Carpenter (1856d), p. 200; Carpenter (1863), p. 641; Wood 
and Raymond (1891), p. 55. j ; 
Paphia tenerrima, Dall (1902a), p. 399; Arnold, R. (1903), p. 151, pl. 14, 
fig. 6. 
DescriptionArnold (1903) described this species as follows: 
“Shell large and thin, (?) oval, convex; surface sculptured by numerous low, 
sharp, concentric frills, and numerous fine, rounded, crowded, radiating lines, 
these latter being almost obsolete in some specimens; margin smooth, hinge long 
the middle one in the left valve prominently bifid; pallial sinus very deep and 
and narrow; three teeth in each valve, the anterior two rounded; no lunule.’’ 
Length, 8 to 12 mm. 
Occurrence.—At stations D 5744 (2), D5808 (2), and question- 
ably at D 5779 (1). 
This bivalve is listed by several collectors from this region. Only 
very immature specimens that have been referred to this species were 
obtained by the Survey. ‘Two living specimens were dredged within 
the middle segment of the bay in 514 fathoms from a bottom composed 
of mud and sand. 
Range.—AStrait of Juan de Fuca, Washington, to San Quentin Bay, 
Lower California (Dall). 
Venerupis Lamarck 
Venerupis lamellifera (Conrad) 
Venus lamellifera Conrad (1837), p. 251, pl. 19, fig. 19. 
Rupellaria lamellifera, Carpenter (1863), p. 641. 
Venerupis lamellifera, Dall (1902a), p. 400. 
Petricola lamellifera, Arnold, R. (1903), p. 155. 
