200 Bulletin, Vanderhilt Marine Museum, Vol. II 



of the series, slightly outward and upward directed, acuminate; the 

 fourth tooth is similar but smaller and more acuminate. The upper 

 surface of the carapace is punctate and finely setiferous. The regions 

 are very definitely delineated, the urogastric and cervical grooves 

 being the most heavily impressed. The postlateral margins are dis- 

 tinctly convergent, and the posterior margin is relatively straight. 

 The first and second abdominal segments are narrow, exposing the 

 sternal plastron. The female abdominal belt is seven-segmented; the 

 male has the third, fourth and fifth segments coalesced. 



The orbit is oblong, marginal. The eyes are movable, the eyestalk 

 tapers slightly distally; the cornea is terminal, a trifle smaller than 

 the stalk, with a tongue-like projection of the stalk on its upper 

 surface. 



The external maxillipeds are well separated and have the meral 

 joint of the endognath subquadrate with the inner distal angle 

 notched for the reception of the palp. 



The chelipeds are much larger in the male than in the female and 

 are slightly unequal in the male. The meral point has an acute, sub- 

 distal spine on the upper lateral margin ; the carpus is convex on the 

 upper surface and has an acute tooth at the inner, upper angle and 

 below this and more proximal in position a lesser tooth, about one- 

 half to two-thirds as strong as the dorsal one ; the propodus, includ- 

 ing the fingers, is nearly as long as the greatest width of the carapace, 

 the fingers being two-fifths of this length and strongly deflected ; the 

 palm is dilated, its height equal to three-fourths its greatest length, 

 the outer surface slightly rounded, smooth; the fingers of the right 

 cheliped are slightly stockier and are separated by a gape, each armed 

 with a few weak teeth. The fingers of the opposite hand are slenderer, 

 longer, with many teeth closed upon each other, the curved tips over- 

 lapping. 



The ambulatories are slender, pubescent, subsimilar, except that the 

 fourth pair have the dactyl curved upward ; there are heavy fringes of 

 setae on the dactyli, and also on the upper margins of the hand and 

 finger of the cheliped. 



Synonymy. — 8peocarcinus carolinensis Stimpson, Ann. Lye. Nat. 

 Hist. N. Y., vol. 7, p. 59, pi. 1, figs. 1-3, 1859.— Eathbun, Bull. U. 

 S. Fish. Comm., vol. 20, pt. 2, p. 11, text fig. 2, 1901 ; Bull. 97, 

 U. S. Nat. Mus., p. 39, pi. 8, pi. 159, fig. 6, 1918. 



