THE GKAPSOID CRABS OF AMEEICA. 



143 



most prominent at antero-lateral angle, but disappearing near orbit. 

 Front slightly advanced ; orbits oval, filled by the eyes. 



Chelipeds large; palm suboblong, widening distally, upper and 

 lower margins slightly convex; thumb shorter than dactyl, slightly 



FIG. 87. PIXXIXA PARA (31599), X 6. a, THIRD LEG OF FEMALE ; b, THIRD LEO OF MALE ; 



C, UIGHT CHELA OF MALE J d, LEFT CHELA OF FEMALE ; e, EVE IN OltBIT, FRONT VIEW. 



deflexed with the end upcurved, edge finely crenulate and with a dis- 

 tal notch into which the tip of the dactylus fits; dactyl curved, a tri- 

 angular tooth near its base, and forming when closed a moderate gape 

 with the thumb ; fingers hairy within and toward their base. 



Fio. 88. PIXNIXA FABA (31599). a, OUTER MAXILLIPED o FEMALE, x 16 ; 6, ABDOMEN 



OF MALE, X CJ. 



Legs similar in shape, except merus of first leg which is concave 

 above instead of convex as in the other pairs. Propodi tapering dis- 

 tally, dactyli short and strongly curved. First leg narrow, reaching 

 to end of propodus of second; second and third legs subequal in 



