GRAPSOIDEA. 



\-emarginato. Carpus supi'a minute rugatus; manus extus Icevis, 

 supra paulo rugata. Articxdi 4:tus Stusque pedum 8 posticorum 

 sparsim hirsuti; Ztius pedis postici apice inferior e truncatus, integer, 

 pedis 4:ti Ztiive 2-Z-dentatus. 



Near varius. 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. 



Rio 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. 



GONIOGRAPSTJS INNOTATUS. 



Carapax fere quadratics, lateribus postice convergentibus, fronte sat de- 

 clivi, margine antero-laterali 1-emarginato, lineis transversis carapacis 

 subtilissime crenidatis. Carpus supra IxEvis; nianus supra extusque 

 Icevis ; brachium apice 2—3-dentatum. Artieidus pedis postici tertius 

 apice infer iore 2>-dentatus. 



87 



