504 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



The lower half of the major palm of the male is usually smooth and 

 naked, the smooth area separated from the rough area by a line 

 running from the lower proximal corner to the distal end opposite the 

 middle of the base of the dactylus or sometimes further down. In the 

 female the smooth space is similar to, but smaller than, that of the 

 male. 



Measurements. — Female (32964), length of carapace including spine 

 23.4, median length 22.4, width including spines 34.6, excluding spines 

 32, fronto-orbital width 20.3, width of front including antennal spine 

 8.5 m. 



Range. — From San Pedro, California, to Magdalena Bay, Lower 

 California. 



Material examined. — 



CALIFORNIA.— Vicinity of San Pedro: 1917; E. P. Chace; 1 male 

 (53988). 



Long Beach; H. N. Lowe; 1 female, soft shell (50550). 



Santa Catalina Island; dredged; H. N. Lowe; 3 females (32964). 



La Jolla, on rocks north of Institute; January 28, 1915; Scripps 

 Institution; 3 males, 4 females (54763), 2 males, 6 females (2 oviger- 

 ous) (Scripps Inst.). Third lateral spine bifid in 1 male (54763). 



San Diego: C. R. Orcutt; 1 male, 1 female (54734). False Bay; 

 San Diego Society of Natural History; 1 female (returned to sender). 



Southern California; Anton Dohrn; Venice Marine Biological Sta- 

 tion; 1 female (50258). 



LOWER CALIFORNIA.— Point Abreojos; March 6, 1911; Alba- 

 tross; 1 male (60035). 



Magdalena Bay: 1917; C. R. Orcutt; 1 male, soft shell, 1 female 

 (50631). Shore; Hanna and Jordan, California Acad. Sci.; 1 male; 

 returned. 



Magdalena Bay; Sail Rock, Entrada Point, S. 53° W.; Redondo 

 Point, S. 15° W.; lat. 24° 35' 20" N.; long. 111° 59' 35" W.; 13.5 

 fathoms; S. brk. Sh.; March 21, 1911 ; station 5678, Albatross; 1 male, 

 1 female, 2 young (60034). 



PILUMNUS TOWNSENDI Rathbun 



Plate 202, Figure 1 ; Plate 204, Figures 1 and 2 



Acanthus spino-hirsutus Lockington, Proc. California Acad. Sci., vol. 7, 1876 



(1877), p. 102 [8] (part), not p. 33 [6]. 

 Pilumnus spino-hirsutus Streets and Kingsley. Bull. Essex Inst., vol. 9, 1877, 



p. 107 (part). — Kingsley, Proc. Boston Soc. Nat. Hist., vol. 20, 1879, p. 



154. — Rathbun, Harriman Alaska Exped., vol. 10, 1904, p. 185 (part), pi. 



7, fig. 2; Proc. U. S. Nat. Mus., vol. 38, 1910, p. 585 (part). 

 Pilumnus townsendi Rathbun, Bull. Amer. Mus. Nat. Hist., vol. 48, 1923, p. 



624, pi. 28 (type-locality, off Adair Bay, Gulf of California; type, Cat. No. 



17413, U.S.N. M.). 

 f Eriphides hispida Boone, Zoologica, vol. 8, 1927, p. 236 (part: text-fig. 87 B) . 



