122 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



reach or nearly reach the last segment and are slightly curved at the 

 tip in the adult. Abdomen of female with fifth segment much nar- 

 rower distally than proximally, and shorter than sixth. 



Color. — Carapace violet blue. Under parts grayish j^eilow except 

 abdomen of female which is rose with a broad band of black on each 

 segment. Chelipeds violet above, inner surface of chelae bluish. 

 Ambulatory legs tinged with blue, ends of dactyls and fingers red. 

 Swimming feet mostly \^e!lowish, paddle mostly blue. (After A. 

 Milne Edwards.) 



Measurements. — Male with short lateral spine (15432), total length 

 of carapace 59, width of same 119, width at anterior base of lateral 

 spine 99, fronto-orbital width 45.3, width of front 14.6 mm. Male 

 with long lateral spine (40442), total length of carapace 52, width of 

 same 120.5, width at anterior base of lateral spine 90.5, fronto-orbital 

 width 39, width of front 11.5 mm. A. Milne Edwards's Plate 41, '« 

 of this species under the name nitidus, shows a very large specimen, 

 carapace 71 by 165 mm. 



Range. — Southern California to Chile (A. Milne Edwards). 



Material examined. — 



CALIFORNIA.— Anaheim Slough; 1928; Lena Higgins; 1 oviger- 

 ous female (62050). 



MEXICO. — Magdalena Island, Lower California; December 5, 

 1905; Nelson and Goldman, U. S. Department of Agriculture; 1 male 

 (33417). Turtle Bay, L. Cal.; August 1, 1986; A. W. Anthony; 

 1 small male (19515). Cape St. Lucas, L. Cal.; John Xantus; 1 male, 

 type (61833), 1 half grown (5174, M. C. Z.). San Jose del Cabo, L. 

 Cal.; A. W. Anthony, 4 males (20693); March 2, 1911, Albatross, 2 

 males, 1 female, immature (60004). 1889, Albatross: San Bartolome 

 Bay, 1 male (15433); Concepcion Bay, mouth of Rio Mulege, March 

 19, 1 male, 1 female (15432); Algodones Lagoon, March 31, 17 males, 

 10 females (15431); Horseshoe Bend, Colorado River, 1 male (15434). 

 Guaymas; H. F. Emeric; 2 specimens (14854). Mazatlan; Nov., 

 1920; U. S. Bureau of Fisheries; 1 male, returned to sender. Acapulco; 

 Hassler Expedition; 2 half grown (M. C. Z.). 



GUATEMALA. — Tanesco, on the borders of the Esteros; 1 male 

 cotype (20269), received from Paris Museum; 1 male, 1 female, 

 CO types (Paris Mus.). 



SALVADOR.— El Cutaco; February 14, 1924; Hildebrand and 

 Foster; 3 males, 2 females, all young (58175). El Triunfo; Feb. 10, 

 1924; Hildebrand and Foster; 1 young male (58176). Gulf of Fonseca 

 J. A. McNiel; 1 male type of C. dubia Kingsley (5178, M. C. Z.). 



NICARAGUA. — Realejo; 1 young (Copenhagen Mus.). 



■Trust. R6g. Mex., 1879. 



