294 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Material examined. — 



CALIFORNIA. — Venice Breakwater: Anton Dohrn; Venice Marine 

 Biological Station; 3 males (50252). March 13, 1913; J. R. Beck; 

 1 male (62512); from Univ. Southern California. 



Redondo; E. P. Chace; 1 male (53905). 



Point Fermin; March 25, 1918; E. P. Chace; 1 male (53990). 



San Pedro; H. N. Lowe; 3 males, 2 females (23052). 



Point White, San Pedro; May 18, 1919; E. P. Chace; 2 young 

 (53901, 53902). 



Long Beach; H. N. Lowe: 1 female (50514). December, 1924; 



1 female (60863). 



Laguna Beach; W. A. Hilton; 1 male (48994); 9 young (54025- 

 54030); 1 specimen (50602); 1 young male, medium low tide (50603), 

 carapace very light, almost white, fingers and second, third and 

 fourth pairs of legs brown; 1 male, 1 female (50601), carapace white 

 with purplish pink longitudinal marks. 



Catalina Harbor, Santa Catalina Island; W. H. Dall: Beach; 7 

 males, 1 young (17507), 2 males (17509). 30-40 fathoms, sandy 

 mud; 2 females, 2 young (17508). 



Catalina Harbor; west shore; December 28, 1912; Anton Dohrn; 

 Venice Marine Biological Station; 2 males (50249). 



Isthmus Harbor, Santa Catalina Island; Anton Dolirn; Venice 

 Marine Biological Station; 10 males, 6 females, 8 young (50250). 



Avalon, Santa Catalina ..Island; C. F. Baker; 2 males (29305). 



Sugar Loaf Rock, Avalon Bay, Santa Catalina Island; June 18, 

 1913; Anton Dohrn; Venice Marine Biological Station; 3 males 

 (50251, 50266). 



San Nicholas Island; H. N. Lowe; 1 male, 1 female (32968). 



San Clemente Island ; January, 1899; H. N. Lowe; 2 males (23061). 



La Jolla; September 22, 1918; W. L. Schmitt; males, 5 females, 



2 young (53972). 



San Diego: 1861; J. G. Cooper; 2 males (17536). H. Hemphill; 

 1 male, 6 females (17531). C. R. Orcutt; 2 males (17499). San 

 Diego Society of Natural History; 2 specimens (53360). 



California; from Boston Society of Natural History; 1 female (56807). 



LOWER CALIFORNIA.— San Martin Island; July 16, 1896; 

 A. W. Anthony; 1 male (19505). An unusually large specimen of 

 extraordinary width. See under ^^ Measurements.^' 



Guadalupe Island; 1889; Albatross; 1 male (17395), holotype of C. 

 calif orniensis Rathbun. 



Genus PHYMODIUS A. Milne Edwards 



Phymodius A. Milne Edwards, Ann. Sci. Nat., ser. 4, vol. 20, 1863, p. 283; 

 type, P. ungulatus (H. Milne Edwards). 



Carapace moderately convex, hexagonal, regions well delimited 

 and broken up into numerous convex areolae. Front bilobed, the 



