312 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Material examined. 



Almendores Eiver, " La Chorrere," near Vedado, Havana, Cuba ; 

 M. S. Roig; 1 male, 1 female (46084, 46085). 



Jamaica; 1910; E. A. Andrews: Montego Bay; Aug. 3; 8 males, 

 13 females (42876). Montego River; Mar. 20; 3 males. 2 females 

 (42877). Montego River and Flint River; Aug. 29; 1 male. 20 

 females (42878). 



St. Thomas; Saussure; 2 male and female, cotypes (Geneva Mus.). 



Vera Cruz, Mexico; 2 males, 2 females (Brit. Mus.). 



Belize, British Honduras; Mrs. F. E. D. Meehling; 2 females 

 (3286). 



Stann Creek; British Honduras; found in a hole in the' perpen- 

 dicular bank of the river; Rev. W. A. Stanton; 1 female (22596). 



Ceiba, Honduras; Sept. 29, 1916; F. J. Dyer; 1 male, 1 female 

 (49914). 



Greytown, Nicaragua; Feb. 12, 1892; Chas. W. Richmond; 3 

 males, 2 females (19417). 



" Central America," probably ; from a bunch of bananas at Wash- 

 ington, District of Columbia; R. W. BroAvn; 1 female (16160). 



" West coast of Central America," locality probably wrong ; 2 

 males (17295). 



SESARJVIA (HOLOMETOPUS) ROBERTI Milne Edwards. 



BRACKISH-WATER CRAB. 



Plate 91. 



Sesarma roberti MILNE EDWAKDS, Ann. Sci. Nat., ser. 3, Zool., vol. 20, 1853, 



p. 182 [148], (type-locality, Gorge; type in Paris Mus.). 

 Sesarma americana POCOCK, Ann. Mag. Nat. Hist., ser. 6, vol. 3, 1889, p. 7. 



Not S. americana Saussure, 1858. 

 Sesarma bromeliarum RATHBUN, Proc. U. S. Nat. Mus., vol. 19, 1896, p. 



143 (type-locality, Rio Cob re (St. Catherine), Jamaica; male holotype, 



Cat. No. 19406, U.S.N.M.). 



Diagnosis. Length greater than anterior width. Sides of front 

 subparallel. Merus joints of legs of even width in their distal half. 



Description. Length of carapace exceeding its anterior width and 

 nearly equaling its posterior width; surface rough with pits and 

 wrinkles, and anteriorly rough with squamiform granules. 



Supra-frontal lobes deeply separated, the middle pair not much 

 wider than the outer pair which are very oblique. Front four times 

 as wide as high, sides subparallel, lower edge sinuous, quadrilobate, 

 median sinus very deep and wide. 



Upper margin of orbit straight, up to the outer tooth, which is 

 acute and well marked. 



