THE GKAPSOID CRABS 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 Mya 

 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 horealis 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° K; 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). 



Cryptoiilirys puhescens 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 



