350 



CRUSTACEA. 



Following feet slender, third joint nearly naked above and lanose 

 below, the following joints with the margins mostly pubescent, fifth 

 sulcate above, tarsus slender. Abdomen of male very narrow, last 

 joint narrow elongate. 



Plate 22, fig. 4 a, male, enlarged two diameters ; b, abdomen and 

 sternum of male ; c, outer maxillipeds, enlarged four diameters ; d, 

 leg of second pair, enlarged two diameters. 



Sandwich Islands. 



Length of carapax, six and one-fourth lines ; breadth, six and three- 

 fourths lines; length of front, two and three-fourths lines. The hands 

 have a narrow flattened space along the top, and the carpus an inden- 

 tation in the upper surface. The third joint of the second and third 

 pairs of legs is very densely hairy below, and the same joint of the fourth 

 pair is somewhat less so, and the fifth joint is also nearly as densely 

 hairy below. The last joint of the male abdomen is hardly larger at 

 base than above, being linear nearly in form. The lateral margin has 

 a third obsolescent emargination, behind the two which are more 

 distinct, nearer the second than the second to the first. The fifth 

 joint of the last pair of legs, is much more hairy on both margins than 

 in the other pairs. From the extremity of the lower finger, on its 

 inner and upper side, there is a crenulate line extending towards its 

 base ; and a similar line less distinct on the upper finger. 



H. crassimanusy Dana, Proc. Acad. Nat. Sci. Philad., 1851, v. 250. 



Hemigrapsus AFFINIS. 



H. crassimano ferme affinis. Manus maris crassa, minus tumida, an- 

 tice paulo compressa, digitis hiantibus. Articulus pedis 2di otu Ative 

 tertius infra villosus, supra partim pubescens. Pes hius articulis ito 

 5to Qtoque infra supraque pubescens. Margo carapacis antero-lateralis 

 S-emarginatus, emarginationibus duabus posticis parvuUs. 



Very near H. crassimanus. Hand of male stout, but less tumid and 

 somewhat compressed towards fingers, fingers gaping. Third joint 



