GRAPSOIDEA. 317 



points, and has the inner surface twice concave and denticulate. The 

 male abdomen is flat or nearly so. 



H. nitidus, DANA, Proc. Acad. Nat. Sci. Philad., 1851, v. 248. 



GELASIMUS DUPERREYI, Gutrin. 

 Tongatabu and Upolu. 



Length of carapax of a male, nine lines; breadth between the 

 anterior angles (greatest breadth), thirteen lines; ratio, 1 : T44 ; 

 length of hand, one inch six and a half lines. Colours, brownish red, 

 or purplish, marbled with white, but varying much. 



This species is near the nitidus, but has much narrower fingers and 

 less compressed hand, yet the hand is equally large. There is a large 

 open space between the fingers when they are closed. Anterior mar- 

 gin of carapax strongly arcuate, the anterior angles being much behind 

 the line of the front, and the lateral margins quite to these angles 

 straight or slightly concave. Surface smooth and shining. Legs 

 nearly naked; anterior pair very unequal, the larger hand obtuse 

 and nearly straight above, very minutely granulous on outer surface ; 

 basal portion rather longer than broad ; inner surface with the lower 

 crest (so prominent in the nitidus) obsolete; upper finger narrowing 

 from base to apex, and somewhat bending downward, lower margin 

 somewhat concave, granulous, but not lobed or dentate ; lower finger 

 with upper margin granulous, and two low elevations on outer half. 

 Arm with anterior margin hardly acute, entire, and terminating above 

 in an acute or subacute tooth. Eight posterior legs nearly naked ; 

 tarsus fringed either side with hairs. 



The front is narrow, but not narrower between the eyes than be- 

 low ; the lower margin of the orbit is crenulate. 



G. Duperreyi, GrUERiN, Voy. de la Coquille, pi. 1, f. 2. 



GELASIMUS ANNULIPES, Latreille. 



Singapore, East Indies. 



80 



