GRAPSOIDEA. 345 



\-emarginato. Carpus supra minute rugatus ; manus extus Icevis, 

 supra paulo rugata. Articuli tus 5tu$que pedum 8 posticorum 

 sparsim Jiirsuti ; Stius pedis postici apice inferiore truncatiis, integer, 

 pedis -iti 3tiice 23-dentatus. 



Near variu-s. Carapax subquadrate, sides hardly convergent back- 

 ward, front a little inclined and slightly sinuous, antero-lateral 

 margin one-emarginate. Carpus above minutely rugate ; hand 

 smooth externally, slightly rugate above. Fourth and fifth joints 

 of feet sparsely hairy ; third joint of last pair truncate at lower 

 apex, entire, of third and fourth pairs two or three-toothed. 



Plate 21, fig. 8 a, outline of carapax, enlarged two diameters; b, leg 

 of fifth pair, enlarged four diameters. 



Eio Janeiro ? 



Length of carapax, four lines; breadth, four and three-fourths lines; 

 length of front, two and three-fourths lines. The antero-lateral 

 margin has a single emargination, as in the crassipes of Randall, J. 

 Acad. Nat. Sci., viii. 127 ; but that species, according to Dr. Randall, 

 has " the front considerably depressed, with four rounded lobes above, 

 all very convex, and resembling great tubercles," but in this species, 

 the two outer of these lobes are faint, and the two inner are low, and 

 could hardly be compared to tubercles. The body, moreover, is rather 

 thin instead of stout. The arm in the crassipes, has the inner apex 

 very much dilated and projecting, with the projection truncate. 



G. simplex, DANA, Proc. Acad. Nat. Sci. Philad., 1851, v. 249. 



GONIOGRAPSUS INXOTAT0S. 



Carapax fere quadratus, Jateribus postice convfrgentibiis, frante sat de- 

 clici, margine antero-laterali \-emarginato, lineis transversis carapacis 

 subtllissime crenulatis. Carpus supra Icevis; manus supra extusque 

 loevis ; brachium apice 2-3-den(atum. Articulus pedis postici tertius 

 apice inferiore 5-dentatns. 



87 



