THE CANCROID CRABS OF AlVIERICA 219 



Point White, San Pedro; May 18, 1919; E. P. Chace; 1 5^oung 

 (53873). 



Seal Beach; July 28, 1923; 1 young, returned to University of 

 Southern California. Off Long Beach; 5% fathoms; temp. 19.5° C; 

 May 16, 1925; 9 young (62498), from University of Southern 

 CaHfornia. 



Long Beach; on wharf; H. N. Lowe; 2 males, 2 females (23048). 



Anaheim Bay; November 18, 1918; E. P. Chace, 1 young female 

 (54005). 



Off Catalina Island; 50 fathoms; H. N. Lowe; 1 young female 

 (29959). 



La JoUa; 1915; 2 young; returned to Scripps Institution. 



San Diego Bay; 6 fathoms; fne. S. brk. Sh.; March 21, 1894; station 

 3577, Albatross; 1 male (22246). 



MEXICO. — West coast of Lower California: 



Cape Cohiett; gift of Ida S. Oldroyd; 1 young (62738). 



Playa Maria Bay; A. W. Anthony; 1 male (holotype), 1 female 

 paratype (19856). 



Rosalia Bay; August 20 and 23, 1896; A. W. Anthony; 7 young 

 (19822). 



Magdalena Bay; 2 specimens (M.C.Z.). 



CANCER GRACILIS Dana 



Plate 95 



Caneer gracilis Dana, Proc. Acad. Nat. Sci. Philadelphia, vol. 6, 1852, p. 73 (type- 

 locality. Bay of San Francisco; type not located) ; U.' S. Expl. Exped., vol. 13, 

 Crust., pt. 1, 1852, p. 153; atlas, 1855, pi. 7, fig. 2a-d.— Weymouth, Stanford 

 Univ. Publ., Univ. Ser. No. 4, 1910, p. 42, pi. 9, figs. 26-28.— Schmitt, Univ. 

 Cahf. Publ. ZooL, vol. 23, 1921, p. 232, pi. 35, fig. 2, and synonymy. 



Diagnosis. — Nine low antero-lateral teeth, one postero-lateral. 

 Fingers of cheliped without dark color. Merus of outer maxillipeds 

 elongate, anteriorly rounded. 



Description. — Carapace strongly convex, very slightly areolated, 

 densel}^ granulated, widest at ninth (sometimes eighth) tooth. 

 Antero-lateral teeth low, 9 in number, of unequal width, projecting 

 less than one-third width of base, not spiny-pointed. One small 

 blunt postero-lateral tooth. Median tooth of front smaller than 

 those of the next pair but well advanced beyond them. Outer and 

 distal margins of merus of outer maxilliped forming a single curve 

 without angulation. Arm with a small distal and subdistal spine or 

 spinule; wrist with two inner spines or teeth, the smaller below the 

 other. Propodus with nearly horizontal margin, outer-upper surface 

 with seven longitudinal carinae some of which are incomplete, the 

 upper one bispinulous, the next one similar; upper edge of dactylus 

 finely roughened at its middle. Legs relatively narrow, merus finely 

 rugose above, dactyls long and narrow. 



