326 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



orbit; below, the suborbital and subhepatic regions are coarsely gran- 

 ulate, without a definite line between the third tooth and the buccal 

 angle. 



Carpus of chelipeds crossed by a few thickened ridges incompletely 

 reticulating, distal margin having a thick granulated ridge distinctly 

 separated by a deep sulcus from rest of carpus; a large granulated 

 tubercle near articulation with hand. Upper surface of hand with 

 two longitudinal ridges, the outer straight, the inner curved and 

 ending proximally in a lobe or tooth; in the old these ridges tend to 

 disappear but not the lobe; outer surface of hand granulate, the gran- 

 ules forming more or less in longitudinal and transverse lines and 

 becoming fainter below and toward the fingei's. Dark color of im- 

 movable finger of male runs back a little on palm, ending in an oblique 

 line, and in a right angle above. Carpus of ambulatory legs distinctly 

 but not markedly bilobed on the upper margin ; propodus with slightly 

 convex upper margin. 



Color. — Shows great variation, some have black fingers with white 

 tips, others have colored fingers, and the general tint of the carapace 

 varies considerably (Lockington). 



Measurements. — Male (32976), length of carapace 10.6, width of 

 same 13.9; fronto-orbital width 8.2, width of front 4.5 mm. 



Variation. — The reticulating ridges of the carpus (wrist) are some- 

 times very strong (as in the holotype) and may be broken up into 

 more or less elongated tubercles as in specimens from Long Beach 

 (50548) and Anaheim Slough. 



Range. — From San Pedro, California, to Gulf of California, Mexico. 

 To a depth of 4)^ fathoms. 



Material examined. — 



CALIFORNIA.— San Pedro; H. N. Lowe; 2 males (32976). 



Long Beach; H. N. Lowe; 1 female (50548). 



Anaheim Slough; Lena Higgins; 2 females (1 ovigerous), variety 

 (61536). 



Newport Bay; November 27, 1914; Anton Dohrn, Venice Marine 

 Biological Station; 1 male, 1 female, soft shell (50241). 



San Diego; H. Hemphill; 1 male (22562). 



San Diego Bay; Albatross: 4)^ fathoms; R. brk. Sh. ; March 24, 1894; 

 station 3591; 1 female holotype (19973). 4 fathoms; M. Sh.; March 

 31, 1896; station 3619; 1 young female (55500). 



MEXICO.— "La Paz, 3 fathoms, Mulege Bay, Port Escondido, 

 No. 29"; 1 male, 2 females, described by Lockington (p. 100) and 

 lent to the author by S. J. Holmes after the original specimens (types 

 of leucomanus) had been lost. 



