THE GRAPSOID CBABS OF AMEKICA. 



217 



tubercles and several small ones, and some granules near the tu- 

 bercles; depressions in the main finely and sparingly granulate. 

 Frontal teeth tuberculifonn, of subequal ^vidth, sinuses U-form and 

 of subequal Avidth, but the median sinus much deeper. Outer angle 

 of preorbital lobe much depressed; next 2 lobes short, broadly 

 rounded, the outer one most advanced; sinuses V-shaped, the middle 

 one narrower than the others. Outer lobes of orbits strongly inclined 

 toward each other, outer margins convex. Antero-lateral teeth three, 

 small, thick, of which one is hepatic and two branchial, the latter 

 near together and the anterior of the pair the larger. Eidge above 

 posterior margin straight, formed of six or more round tubercles, 

 with granules intervening. Lobes of suborbital margin very promi- 

 nent, visible in dorsal view; outer lobe very large and rounded, inner 

 lobe very narrow, with blunt extremity; sinuses broadly V-shaped, 





■<s? <-■*< 









a o 



Fio. 131. — CTMoroLiA ccRson, after A. Milne EnwAnos and Bouvieu. a. Dorsal view 



OF BODY OF FEMALE SHOWN IN FIG. 130, X 3i ; 6, SAME VIEW OF FEMALE (G4t)0), 



TVl'E OF C. DlLATATAj X 4. 



the inner one rounded at base. Pterj'gostomian lobe large, rounded, 

 a little constricted at base, covering all of the inner suborbital lobe 

 except the tip, in ventral view. 



Chelipeds slender in both sexes. 



Of the ambulatory legs the second is very much longer and 

 stronger than the third ; the first reaches a little bej'ond end of merus 

 of second, the third a little beyond the carpus of second, second about 

 three times as long as width of carapace; merus joints long, slender, 

 tapering to distal end, anterior margin concave, upper surface armed 

 with sharp granules, most of which form four longitudinal rows, one 

 on each margin and two above; carpus joints without anterior lobes; 

 propodal joints with margins subparallel; posterior margin of 

 dactylus slightly sinuous in second leg only. 



Abdomen of female with a crest on somites 1-5. 



Measurements. — Female (7818) greatest length of carapace 8.3, 

 width of same 12.2, length of second leg 35 mm. 



