THE GKAPSOID CRABS OF AMEBIC A. 321 



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

 female (4T8G5). 



DesteiTO, Santa Catharina, Brazil; Miiller, collector; 15 specimens 

 (Paris Mils.). 



Montevideo, Uruguay; 1885; W. E. SafFord, collector; 2 moles, *2 

 females (1940S). 



Rio de la Plata (Copenhagen Mus.). 



Genus SARMATIUM Dana. 



Sarmatmm Dana, Amer. Journ. Sci., ser. 2, vol. 12, 1S51, p- 2SS [51 ; Proc. 

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

 S. crassnm Dana ; U. S. Exp!, Esped., vol. 13, Crust., pfc. 1, 1S52, p. 357. 



Metagrapsus Milne 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 defiexed, 

 is gradually declivous and obliquely deflexed. 



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

 in tlie 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; Indo-Pacific. 



SARMATIUM CURVATUM MUne Edwards. 



Plate 95. 



Sesarma citrvata Milne Edwards, Hist. Nat. Crust., vol, 2, 1837, p, 75 



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

 Sesarma violncca Hekklots, Addit. Fauna Afr. Occ, 1851, p. 10, pi. 1, tig. 9 



(tj'pe-locality, Boutry ; type in Leyden Mus.). — de Man, Notes Lej'dcn 



Mus., vol. 2, ISSO, p. 31. 

 liletagrapsus curvatus Milne Edwaeos, Ann. Sci, Nat., ser. 3, vol. 20, 1853, 



p. 189 [155]. 

 Metagrapsvn pcctinatiis Milne Edwards, Ann. Sci. Nat., ser. 3, vol. 20, 1853, 



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

 SarmaUum curvatum Kingsley, Proc. Acad. Nat. Sci. Philadelphia, 1880. 



p. 212. 

 Sesarma (Sarmatiuvi) 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. 



Desaiption. — Carapace deep, broader than long, coarsely punctate, 

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



