156 Bulletin, Vanderhilt Marine Museum, Vol. II 



ridges. The propodus is chunky, the palm has the upper surface about 

 as wide as the outer face from which it is defined by a prominent 

 longitudinal ridge at the proximal end of which there is an acute 

 spine; a similar carina defines the inner lateral margin of the palm 

 and terminates distally in an acute tooth; there is a lighter carina 

 approximately midway between these two ; all three carinae are con- 

 tinuous on the finger, the median one being the most prominent ; the 

 outer face of the palm has a very strong median carina, also one just 

 above the lower margin, which is continuous onto the finger. There 

 is one prominent ridge on the inner face of the palm. The fingers are 

 about as long as the palm, approximately subequal, slightly gaping, 

 with the tips decidedly curved; the cutting edge is furnished with 

 large, triangulate teeth between each of which are two smaller tri- 

 angulate teeth. 



The ambulatories are long, similar, the carpus, propodus and dactyl 

 have a dense brush of short setae on the anterior lateral margin ; there 

 is a short fringe on the posterior lateral margin of the dactyl. Here 

 are two longitudinal grooves on each face of the dactyl and one on 

 each face of the propodus. 



The natatory leg is strong, the four promixal joints stocky, the pro- 

 podus and dactyl laminate, suboval. 



Color: In life this crab is bluish-green or grayish-green, with the 

 chelipeds and ambulatories vivid blue, etched at the joints, tips and 

 spines with carmine. There are also touches of carmine on the spines 

 of the carapace. 



Habits : A very excellent account of the habits and life history of 

 this crab are given by Hay and Shore in their report on the ''Decapod 

 Crustaceans of the Beaufort, N. C, Region." 



Synonymy. — Lupa hastata Say, Journ. Acad. Nat. Sci. Phila., vol. 1, 

 p. 65, p. 443, 1817. 



Lupa diacantha DeKay, Nat. Hist, N, Y. Zool., part 6, Crust., p. 10, 

 pi. 3, fig. 3, 1844.— Leidy, Journ. Acad. Nat. Sci. Phila. (2), III, 

 p. 149, 1855. 



Callinectes diacanthus A. Milne Edwards, Miss. Sci. Mex. Crust., vol. 

 5, p. 223, pi. 41, 1878. 



Callinectes hastatus Ordway, Boston Journ. Nat. Hist., vol. 7, p. 568, 

 1863.— Verrill, Kept. U. S. Fish. Comm., vol. 1, 1871-72 (1873), 

 p. 367, p. 468, p. 516.— S. I. Smith, idem, p. 548. — Uhler, Field 

 and Forest, vol. 2, p. 73-76, 1876. — ^Kingsley, Proc. Acad. Nat. 



