THE GBAPSOID CBABS OF AMERICA. 87 



Color. In a male and a female, preserved in alcohol, a persistent, 

 dark spot either side of middle and a dark line in gastro-cardiac 

 sulcus. A female (49628) in formalin is a mixture of grayish-white 

 and tawny ochraceous, the latter color forming a pattern chiefly on 

 the median and antero-lateral parts of the carapace, and covering 

 the fingers of the cheliped and the last 3 segments and the distal end 

 of the merus of the legs. 



Measurements. Male (23929), length of carapace 7, width of same 

 7.3 mm. Female holotype, 4.7 by 5.2 mm. 



Habitat. Commensal in bivalve mollusks and ascidians; some- 

 times free-swimming. 



Range. British Columbia to San Diego Bay, California. 



Material examined. 



Hammond Bay, Vancouver Island, British Columbia; in My a 

 arenaria; May 20, 1916; C. McLean Fraser; 1 female (49628). 



Departure Bay, Vancouver Island, British Columbia ; 17 fathoms ; 

 Dec. 16, 1908; George W. Taylor; 1 male (39129). 



Puget Sound ; in animals of Cardita borealis Conrad ; 2 specimens, 

 one is a young female (17502). 



Neah Bay, Washington; surface; Albatross; 1 female (18410). 



Stewarts Point, California ; in bivalve, Kellia laperousii Deshayes ; 

 July 11, 1911; W. F. Thompson; 1 male (Stanford Univ.). 



Pacific Grove, California; from mantle cavity of Mytilus edulis; 

 John C. Brown; 1 male (23929). 



Off Santa Cruz Island, California; lat. 34 N.; long. 119 29' 30" 

 W.; 30 fathoms; P.; Feb. 6, 1889; station 2945, Albatross; 1 fe- 

 male y., from Phallusia vermiformis (45611). Identification?. 



False Bay, San Diego County, California ; in mantle of Mya cali- 

 fornica; June 4, 1882; C. R. Orcutt; 1 female holotype, 1 y. (17498). 



San Diego Bay, California; Beacon No. 8, NW. by W. \ W. & 

 mile; 5 fathoms; fne. S. M. brk. Sh.; Mar. 19, 1894; station 3564; 

 Albatross; 2 males, 1 female (25428). 



San Diego, California ; in Donax levigatus; C. R. Orcutt ; 15 males, 

 13 females (50443). 



PINNOTHERES PUBESCENS (Holmes). 



Cryptophrys jmbescens HOLMES, Proc. California Acad. Sci., ser. 2, vol. 4, 

 1894, p. 564, pi. 20, figs. 6 and 7 (type-locality, Muleje Bay, Gulf of 

 California; type not extant). 



Diagnosis. Pubescent all over. Carapace subpentagonal, with two 

 longitudinal furrows. Front with median notch. Legs subequal, 

 dactyli curved. 



Description of female. Carapace subpentagonal, convex, median 

 and cardiac regions tumid and separated from hepatic and branchial 



