THE GKAPSOID CRABS OF AMEBICA. 321 



Iguape, Sao Paulo, Brazil; 1901; R. Krone, collector; 1 male, 1 

 female (478G5). 



Desterro, Santa Catharina. Brazil ; Miiller, collector ; 15 specimens 

 (Paris Mus.). 



Montevideo, Uruguay; 1885; W. E. Safford, collector; 2 males, 2 

 females (19408). 



Rio de la Plata (Copenhagen Mus.). 



Genus SARMATIUM Dana. 



Sarmatinm DANA, Amer. Journ. Sci., ser. 2, vol. 12, 1851, p. 288 [5] ; Proc. 

 Acad. Nat. Sci. Philadelphia, vol. 5, 1851 (1852), pp. 247 and 25J ; type, 

 S. crassum Dana ; U. S. Expl. Exped., vol. 13, Crust, pt. 1, 1852, p. 357. 



Mctagrapsus MIT.NE EDWARDS, Ann. Sci. Nat., ser. 3, vol. 20, 1853, p. 188 

 [154] ; type, M. curvatus Milne Edwards. 



Differs from Sesarma as follows: 



(1) The front, instead of being abruptly and vertically deflexed, 

 is gradually declivous and obliquely deflexed. 



(2) The antero-lateral borders are usually arched instead of being 

 in the same straight line with the postero-lateral borders. 



(3) The abdomen of the male does not completely coincide with 

 the breadth of the sternum at the level of the last pair of legs ; and 

 in the female the terminal segment is not deeply impacted in the 

 penultimate segment. 



Distribution. West Indies; west coast of Africa; Tndo-Pacific. 



SARMATIUM CURVATUM Milne Edward*. 



Plate 95. 



Sesarma curvata MILNE EDWARDS, Hist. Nat. Crust., vol. 2, 1837, p. 75 



(type-locality, Senegal; type in Paris Mus.). 

 Sesarma violacca HEKKLOTS, Addit. Fauna Afr. Occ., 1851, p. 10, pi. 1, fig. 9 



(type-locality, Boutry; type in Leydeu Mus.). DE MAN, Notes Leydcn 



Mus., vol. 2, 1880, p. 31. 

 Metagrapsus curvatus MILNE EDWAR&S, Ann. Sci. Nat., ser. 3. vol. 20, 1853, 



p. 189 [155]. 

 Mctagrapsus pcctinatus MILNE EDWARDS, Ann. Sci. Nat., ser. 3, vol. 20, 1853, 



p. 189 [155] (type-locality, Martinique; type in Paris Mus.). 

 Sarmatium curvatum KINGSLET, Proc. Acad. Nat. Sci. Philadelphia, 1880. 



p. 212. 

 Sesarma (Sarmatium) curvatum RATHBUN, Proc. U. S. Nat. Mus., vol. 22, 



1900, p. 281. 



Diagnosis. Lateral margins tridentate. A pectinated ridge on 

 upper-outer surface of hand in male. 



Description. Carapace deep, broader than long, coarsely punctate, 

 regions plainly marked, 4 or 5 oblique striae on postero-lateral re- 

 gions; of the 4 post-frontal lobes, the 2 middle ones are much wider 

 and better marked than the outer ones. 

 658G3 17 21 



