THE GRAPSOID CRABS OF AMERICA. 



43 



joint short, the flagellum standing in the orbital hiatus. The anten- 

 nules fold transversely. Buccal cavern widening anteriorly; the 

 outer angle of the merus of the maxillipeds is prominent. 



Chelipeds unequal, much more massive than the legs. Legs nar- 

 row, dactyli styliform. In the male the third to fifth segments of 

 the abdomen are fused, and the third segment does not reach the 

 coxae of the last pair of legs. 



Locality of type-species un- 

 known. 



PSEUDORHOMBILA OCTODENTATA 



Rathbnn. 



Plate 14, fig. 3. 



Pfteudorhombila octodentatn 

 RATHBUN, Proc. Biol. Soc. 

 Washington, vol. 19, 1906, 

 p. 91 (type-locality, Domin- 

 ica ; holotype male, Cat. 

 No. 32690, U.S.N.M.). 



a 



FlO. 17. FSEUDORHOMBILA OCTODENTATA, MALB 



HOLOTYPE. Q, UlGHT CHELA, OUTER VIEW, 

 X 1 I ft, ABDOMEN, PART OF Sl'EKNUM, AND 

 COXA OF LAST LEG, X 1. 



Diagnosis. Antero - lateral 

 margins arcuate. Wrist sub- 

 rectangular. Abdomen of male with third to fifth segments fused 

 and not covering the sternum at the third segment. 



Description. Carapace very convex fore and aft, regions indis- 

 tinctly defined, surface closely set with flattened granules. Front 

 subtruncate, a V-shaped median notch, a rounded lobe at outer angle. 

 Antero-lateral teeth four (orbital angle excluded) ; the first small, 



separated from the orbit by a long, 

 straight interval; second tooth 

 widest; third and fourth most 

 acute, the third the larger; the 

 fourth the most projecting. 



Chelipeds (the right one at least) 

 strong, covered with fine reticu- 

 lated granulation; merus project- 

 ing little beyond the body, a strong 

 subterminal tooth above; carpus 

 subquadrate, with a conspicuous 

 tooth at inner angle, and the outer- 

 most portion tuberculate; palm nearly twice as long as high, widen- 

 ing distally ; dactylus as long as palm ; both fingers strongly deflexed, 

 not gaping, tips curved and overlapping. 



Ambulatory legs long and narrow; meral joints granulate above 

 and below, carpal joints above; some small superior spines on the 

 merus. Dactyli with two fringes of long hair. 



FlG. 18. PSEGDORHOMBILA OCTODENTATA, 



MALE HOLOTYPE, OUTER MAXILLIPEDS, 

 SHOWING APPROXIMATION, X 3. 



