104 Bulletin, Vanderhilt Marine Museum, Vol. II 



ously armed on the inner and outer sides with seven paired, elongate 

 vesicles, each of which is two-thirds as long as the flagellum. 



The external maxillipeds are typical, close-fitting, the external sur- 

 face closely beaded with coarse granules; the inner margin of the 

 ischium is armed with a series of saw-like denticles which interfit with 

 those of the opposite side. 



The female abdominal belt is large, circular, convex, forming a 

 pouch that practically covers the entire sternal plate. 



The chelipeds (female) are small, equal, covered with felt-like 

 pubescence, the merus armed with a series of spines ; the propodus is 

 slender ; the fingers slender, subequal, the cutting edge armed with a 

 series of fine teeth, the tips meeting. The male chelipeds are greatly 

 developed, the merus being slightly longer than is the carapace, while 

 the propodus is a little longer than the merus. The spines are much 

 more developed on the male chelipeds than on the female. 



The ambulatories are similar, slender, covered with felt, the pro- 

 podal-dactyl joint strongly reinforced, the dactyl strong, curved, the 

 tip acuminate, horn-tipped. 



Synonymy. — "Horned crab" Hughes, Natural History of Barbados, 

 p. 266, pi. 25, fig. 3, 1750. 



Cangrejo cornuda Parra, Descripcion de diferentes piezas de Historia 

 Natural, p. 135, pi. 50, figs. 2 and 3, 1787. 



Cancer furcatus Olivier, Encyc. Meth. Hist. Nat., Insectes, vol. 6, p. 

 174, 1791. 



Cancer cornudo Herbst, Natur. Krabben u. Krebse, vol. 3, part 4, p. 

 6, pi. 59, fig. 6, 1804. 



Pericera cornuta Milne Edwards, Hist. Nat. Crust., vol. I, p. 335 ; 



Cuvieb's Regne Anim. disciples ed., atlas, pi. 30, fig. 1. — A. 



Milne Edwards, Crust. Reg. Mex., p. 51, 1873. — Miers, Joum. 



Linn. Soc. London, Zool., vol. 14, pp. 664, and 673, pi. 13, figs. 4 



and 5, 1879. — Gundlach and Torbalbas, Ann. Acad. Habana, 



vol. 36, p. 362, text fig., 1899 (issued 1900) ; reprint, p. 19, fig. 



10, pi. 4, 1917. 

 Chorinus armatus Randall, Jour. Acad. Nat. Sci. Phila., vol. 8, p. 



108, 1839. 

 Stenocionops furcata Rathbun, Ann. Inst. Jamaica, vol. 1, p. 6, 1897 ; 



Bull. 129, U. S. Nat. Mus., p. 449, pis. 160 and 161, text fig. 131, 



1925. 



