52 S. J. Smith — Crustaceans of the Atlantic Coast. 



The right cheliped is stout and about as long as the whole body of 

 the animal. The propodus is minutely tubercular and somewhat 

 pubescent on the outer and under sides, which together form a con- 

 tinuous and strongly convex surface; the inner inferior angle is 

 armed with small tubercles, biit the distal margin, along the articu- 

 lation with the carpus, is smooth and unarmed. The carpus is almost 

 as long as the basal portion of the propodus, subcylindrical, without 

 lateral angles, and its whole surface minutely tubercular and clothed 

 with dense, but very fine and soft, light-colored pubescence. The 

 basal portion of the propodus is pretty nearly as broad as long, flat- 

 tened vertically, evenly convex above and below, with the lateral 

 margins rounded, and the whole surface, except a small space near 

 the base beneath, as well as the basal portion of both fingers, tuber- 

 culated and clothed like the surface of the carpus. The digital por- 

 tion of the propodus is rather slender and tapers rapidly to the 

 calcareous tip, so that its prehensile edge has an oblique direction 

 toward the right. The dactylus corresponds in form with the digital 

 portion of the propodus and is about as long as the inner margin of 

 that segment. The prehensile edges of both fingers are nearly 

 straight and armed with a few, low and obtuse tubercles. The left 

 cheliped is very slender, about three-fourths as long as the right, and 

 the carpus and propodus are less tubercular than in the right, but ai'e 

 clothed with a similar dense pubescence. The propodus is but little 

 longer than the carpus, is scarcely as broad and considerably thinner. 

 The digital portion, as well as the dactylus, is nearly as long as 

 the basal, slender, and slightly curved downward at the tip. The 

 tips of both fingers are horny, their prehensile edges sharp, but the 

 rest of the surface rounded and naked, except for the scattering fas- 

 cicles of short seta3 arising from little pits in the surface. 



Both pairs of ambulatory legs reach far beyond the tip of the right 

 cheliped and, except the dactyli, are smooth and almost entirely 

 naked. The second pair are a little longer and slightly stouter than 

 the first Init do not differ in other respects. In both pairs the carpal 

 segments are about half as long as the meral and reach to the distal 

 extremity of the carpus of the right cheliped ; the propodal seg- 

 ments are slightly longer than the meral. The dactyli are consider- 

 ably longer than the propodi, slender, strongly curved, particularly 

 toward the very slender and acute tips ; they are compressed 

 laterally, the sides being neai'ly smooth and naked and having 

 a very shallow, longitudinal groove extending to the strongly 

 curved terminal portions which are still more compressed and very 



