THE GEAPSOID CKABS OF AMEEICA. 



187 



Infero-orbital border oblique and nearly straight, cut into two 

 lobes by a narrow emargination, outer lobe one and one-half times as 

 wide as inner; a denticle at inner end. 



Chelipeds of male narrow and rather short. 



Ambulatory legs armed with three or four large teeth on anterior 

 border of merus; the distal tooth is lamellate, obtuse, and truncate 



