THE GRAPSOID CKABS OF AMERICA. 299 



Chelipeds strong, upper and outer margins denticulate, with a 

 deep subterminal sinus; inner margin expanded at the middle, den- 

 tate ; outer surface of merus and carpus crossed by granulated rugae ; 

 inner angle of wrist acute. Hand nearly twice as high as its su- 

 perior width; densely but obscurely granulate outside, a short lon- 

 gitudinal ridge near the middle, upper margin acute, granulate, the 

 granules in pairs in a single line; inner surface irregularly dentate, 

 pollex broad and flat, upper surface of dactylus with 1416 spinules, 

 which reach nearly to the tip. 



Legs very broad and nearly naked; third leg a little over twice 

 as long as the carapace, its merus less than twice as long as broad. 

 Margins of last two joints tomentose. 



Measurements. Male (22839), length of carapace 26.4, width be- 

 tween orbital angles 30, width of front 18 mm. 



Range. From Trinidad. West Indies, to Desterro, Brazil. 



Remarks. S. rectum is nearest S. sulcatum, a species with a lat- 

 eral tooth, and narrower and more hairj^ legs. 



Material examined. 



Trinidad; Jan. 30-Feb. 2, 1884; Albatross; 1 male, 1 female 

 (194T6). 



Surinam; Dr. Hering; 1 male holotype (Mus. Phila. Acad. Sci.). 



Pernambuco, Brazil: 1876-1877; R. Rathbun; 1 male young 

 (40817). Aug. 1, 1899; on mangroves; Branner-Agassiz Exped. ; 



1 male, 1 female (25711). 



Mapelle, Bay of Bahia, Brazil; 1876-1877; R. Rathbun; 1 female 

 (40819). 



Plataforma, Bahia, Brazil; 1876-1877; R. Rathbun; 1 male 

 (40820). 



Salt Lagoa, Caravellas, Bahia, Brazil ; 1876-1877 ; R, Rathbun ; 1 

 female (40818). 



Terra de Masahe, Rio de Janeiro, Brazil; Jan., 1912; E. Garbe; 



2 males (47862). 



Rio de Janeiro, Brazil; Thayer Exped.; 1 male (22839). 



Ilha Casquerinita, Santos, Brazil; June, 1913; H. Luderwaldt; 1 

 male, 1 female (47867). 



Piassaguera, Santos, Brazil: June, 1913; H. Luderwaldt; 2 males 

 (47859). 



Iguape, Sao Paulo, Brazil; 1902; R. Krone; 1 male (47827). 



SESARMA (HOLOMETOPUS) OCCIDENTALS Smith. 



Sesarma occidentalis SMITH, Trans. Connecticut Acad. Arts and Sci., vol. 

 2, 1870, p. 158 (type-locality, Acajutla, west coast of Central America ; 

 male holotype in P. M. Y. IT.). 



Diagnosis. Transverse. Front without deep median sinus. Hand 

 cristate above. 



