S. I. Smith on American Crustacea. 159 



the carpus ; the carpus is thickly beset externally with sharp gi-an- 

 ules ; the basal portion of the propodus is short, and the outer surface 

 is evenly rounded and very granulous and the superior margin is 

 armed with a sharp crest ; and finally, the dactyl us is granulous on 

 the upper side at base. 



The ambulatory legs are rather slender, the meral segments are 

 sharply granulous above, and the propodi and dactyli are clothed with 

 a few short, stiff hairs along the margins. 



Two males give the following measurements : — 



Length of Breadth of Breadth at Breadth Height 



carapax. carapax. Eatio. orbital angles. of front. of front. 



11-6™™ 13-ln"n 1:1-13 12'9ni™ 7-omm 21™™ 



15-8 17-6 1:1-12 16-9 9-4 3-0 



I have seen only two specimens, both males, which were collected 

 at Acajutla, west coast of Central America, by F, H. Bradley. 



Although closely allied to S. cinerea, it is very readily distinguish- 

 ed from all specimens of that species which I have seen, by the gran- 

 ulous anterior regions of the carapax, the coarsely granulous front, 

 and by the crested and granulous hands. The carapax also is more 

 convex anterioi'ly and along the branchial regions. 



The male abdomen and its appendages are almost exactly as in S. 

 cinerea, except that the last segment of the abdomen is somewhat 

 larger in proportion. 



Sesarma angustipes Dana. 



United Stales Exploring Expedition, Crust, p. 353, pi. 22, fig. 7, 1852; Stimpson, 

 Proceedings Academy Nat. Sci., Philadelphia, 1858, p. 106; Annals Lyceum Nat. 

 Hist., New York, vol. vii, p. 66, 1859. 



Six specimens give the following measurements : — 



Sesarma angusta, sp. nov. 



Female. The carapax is quadrate, longer than broad and depress- 

 ed. The protogastiic lobes are very little convex, slightly divided 

 anteriorly and their surfaces beset with sharp granules. The median 

 portion of the gastric region is surrounded by a well marked sulcus, 



