PROCEEDINGS OF THE NATIONAL MUSEUM. 75 



spines above, one near the carjuis on the ui)per margin, and the other 

 at a little distance just below the margin on the inside of the hand; 

 occasionally there are one or two additional spines on the margin; 

 fingers gaping at base with a large tooth on the dactyl in the gape and 

 about 15 small even teeth on each finger along their prehensile edges. 



Smaller males have the spines of the chelipeds much less marked. 



In the female the carapace shows twelve tubercles of about equal size, 

 those correspoiuling to the nine largest ones of the male, being smaller in 

 the female. Chelipeds small and weak ; fingers slightly gai)ing at base, 

 with al)out 20 small teeth, the proximal one on the dactyl being slightly 

 enlarged. The female is much more hairy on the legs and underneath 

 the abdomen and margins of the legs being thickly set with long club- 

 like seta?. 



Specimens in the National jMuseum collection show the following 

 measurements: Length of largest specimen, a mah^, from end of ros- 

 trum to overhanging posterior protuberance, 122 mm. ; width, 84 ; length 

 of cheliped, about 272; of first ambulatory leg, about 205. Length of 

 largest female measured to posterior margin, the intestinal spine not 

 overhanging, 90; width, 57; length of cheliped, 05; of first an)bulatory 

 leg, 80. 



Localit'u'y. 

 California: 



Monterey; D. S. Jordan (587fi). 

 Santa Barbara; D. S. .Jordan (3050). 

 Island of San Miguel; Trowbridge (2083)^. 



Off sontliern California, 20 to 53 latlioms, at nine stations of tbe U. S. Fish 

 Commission steamer AUxitioas. 



