S. I. Smith on American Crustacea. 153 



carapax, including teeth, 34'6 ; ratio, 1:1'19. The carapax in our 

 specimens is somewhat broader and the lobes of tlie front, as seen 

 from above, are more prominent and their summits nearer together, 

 leaving the orbit larger, than in the figure. The propodi and dactyli 

 of the ambulatory legs are thickly ciliated along both edges, while 

 Edwards' figures 2'^ and 2'^ represent only a few cilia on the posterior 

 edges ; in the text, however, the dactyli are said to be " a bords cilies." 

 The abdomen is quite remarkable for a female, the third and the three 

 following segments being united into a single piece, as in the figure of 

 the male abdomen, given by Edwards,* but, unlike the figure, it is 

 broadest at the middle and the margins are convex in outline. 



Family, Grapsid^e. 

 G-lyptograpsus, gen. nov. 



The carapax is much broader than long and the dorsal surface is 

 distinctly areolated. The front is arched and nearly horizontal above 

 the antennoe and antennula^, but excavated and defiexed in the mid- 

 dle. The lateral margins are strongly arcuate and are dentate ante- 

 riorly. 



The epistome is high and nearly perpendicular and is crossed trans- 

 versely by a sharp groove, and the labial border is straight, as seen in 

 a front view, but broken by a distinct notch in the middle, as seen 

 from below. At the sides of the epistome, in the antero-lateral angle 

 of the buccal area, there is a deep and narrow notch, which serves as 

 an efferent orifice. There are no longitudinal ridges on the palate. 



The basis of the antenna is movable and fills the whole space be- 

 tween the small, triangular, inner suborbital lobe and the front, and 

 its summit is excavated on the inner side for the reception of the suc- 

 ceeding segments, which are within the orbit. 



The external maxillipeds are not crested and their inner margins 

 are closely approximated ; the ischium and merus are of nearly equal 

 length and are both very broad, the merus being broader than long, 

 and its antero lateral angle not expanded. 



The ambulatory legs are long and the dactyli are quadrangular and 

 the angles armed with spines. 



None of the segments of the male abdomen are anchylosed. 



* This figure is marked 3 on plate 14, as if it belonged with fig. :!, Z>. spinifer, and 

 on p. 180 it is referred to under that species, but in the explanation of the plates on p. 

 192, no fig. 3e is mentioned, while under D. pictus is placed, "Fig. 2^ . Abdomen du 

 male," yet there is no fig. 2e on the plate, and Be is the only abdomen there figured. 

 The abdomeu is not referred to in the description of D. pictus. 



