132 >S. I. Smith on American Crustacea. 



ridge. The basal portion of the propodus, even in quite small speci- 

 mens, is shorter than the digital portion and its superior and exterior 

 surface is covered with small, depressed tubercles of unequal sizes 

 and so thickly crowded together that there are scarcely any spaces 

 between them, the oblique ridge on the inferior border of the inside 

 is armed with numerous very small tubercles, the whole space between 

 the upper portion of this ridge and the base of the dactylus is finely 

 tuberculose, and the inferior edge is very distinctly margined on the 

 outside. Both the propodal finger and the dactylus are more slender 

 than in G. minax but offer no distinctive characters. 



The ambulatory legs are rather stout, very hairy along the edges 

 of the carpal and propodal segments and the meral segments are 

 broad, those of the posterior pair being about one and a half times as 

 long as broad. 



The abdomen is scarcely at all narrowed at the basal segments. 

 The terminal segment is very much as in G. minax but slightly 

 broader in proportion and very similar to that of G. pugilator, figured 

 by Edwards in the Annales des Sciences naturelles, 3™" serie, tome 

 xviii, 1852, pi. 4, fig. 14'\ and not at all like his figure of G.palustris^ 

 fig. 13'' on the same plate. 



The females differ from the males in being slightly narrower in 

 proportion and in having the dorsal surface of the carapax more con- 

 vex and minutely granulous. 



In life, the dorsal surface of the carapax of the male is very dark 

 greenish olive, the middle and anterior portion, mottled with grayish 

 white, the front, between and above the bases of the ocular peduncles, 

 lio-ht blue varying somewhat in intensity in different specimens, and 

 the anterior margin tinged with brown. The larger cheliped is 

 lio-hter than the carapax, is marked with pale brownish yellow at the 

 articulations and along the upper edge of the dactylus, and both 

 finoers are nearly white along the prehensile edges. The exposed 

 portions of the the ocular peduncles and the eyes are like the dorsal 

 surface of the carapax. The smaller cheliped and the ambulatory 

 leo-s are somewhat translucent and thickly mottled and sj^ecked with 

 dai'k grayish olive. The sternum and abdomen are mottled ashy 

 gray. The females differ from the males in having the dorsal surface 

 of the carapax less distinctly mottled with whitish and in wanting 

 the blue on the front. This description of the colors was taken, in 

 November, from about a dozen specimens from New Haven. 



