1869.] 277 [Smith. 



tuberant; front and antero-lateral border finely granulous and clothed 

 ■with scattered, coarse pubescence. Front prominent and nearly 

 horizontal, the edge thin, obscurely four-lobed as seen fi-oni above, 

 median lobes much the largest, extending a little further forward than 

 the lateral and separated on the upper edge by a short, deep groove. 

 Superior margin of the oi'bit with two distinct' fissures. Post-orbital 

 tooth separated from the second tooth of the antero-lateral margin by 

 a rounded sinus, and forming with it a prominent bidentate lobe, with 

 the inner tooth obtusely triangular and extending forward to a line 

 with the outer angle of the inferior margin of the orbit, the outer 

 tooth rounded at the tip; remaining teeth of the antero-lateral margin 

 large and prominent; third tooth with its anterior edge straight, and 

 the outer, or posterior, edge arcuate; fourth acutely triangular, the 

 anterior edge thickened and curved slightly forward; fifth, or poste- 

 rior tooth slender and acute, the anterior edge much thickened and 

 strongly curved forward. Inferior lateral regions granulous and 

 pubescent. Inferior margin of the orbit divided by a deep fissure, 

 the inner lobe projecting as a sharp tooth nearly to a line with the 

 front, the outer lobe broad, Avith the edge thin and straight. 



Chelipeds with the carpi and hands smooth or slightly rugose; 

 hands unequal, stout, larger one (either the right or the left) with a 

 tubercle on the outer side projecting forward from the edge between 

 the bases of the fingers; dactylus with a strong basal tooth within; 

 smaller hands with the fingers more slender and slightly deflexed, the 

 dactylus wanting wholly the basal tooth; fingers of both hands with 

 longitudinal impressed strise. Ambulatory feet with the basal joints 

 pubescent along the edges, the terminal joints wholly pubescent. 



Color of alcoholic specimens dark olive above; the fingers black, 

 lighter at the tips. 



Several specimens give the following measurements: — 



