THE GEAPSOID CRABS OP AMERICA. 311 



Brazil; 1876-1877; R. Rathbun: Itaparica, Bahia; 1 female 

 (40821). Bay of Rio de Janeiro; 1 female y. (40822). 



Bermuda; July, 1888; Heilprin; specimens in Mus. Phila. Acad. 

 Sci. 



Locality unknown; 1 female, type of S. guerini (Paris Mus.). 



SESARMA (HOLOMETOPUS) ANGUSTIPES Dana. 



Plate 90. 



Sesarma angustipes Dana, U. S. Expl. Esped., vol. 13, Crust., pt. 1, 1852, 

 p. 353; atlas, 1S55, pi. 22, fig, 7a~c; (type-locality. South America; 

 type not extant). 



Sesarma amcricana Saussitke, Jlgm. Soc. Phys. Hist. Nat. Gendve, vol. 14, 

 1858, p. 441 [25] (type-locality, St. Thomas; cotypes in Geneva Mus,). 



Diagnosis. — Sides of front parallel. Exorbital tooth small. 

 Merus joints of legs diminishing slightly from middle to distal end. 



Descrijytion. — Carapace considerably narrower anteriorly than 

 posteriorly, length subeqnal to anterior width; surface pitted and 

 wrinkled, anteriorly rough with granules arranged mostly in short 

 rows. 



Supra-frontal lobes deeply separated from one another, those of 

 the inner pair not much wider than those of the outer pair. Front 

 four and one-half times as wide as high, sides parallel, lower edge 

 bilobed, with a broad and deep median sinus in dorsal view. 



Outer angle of orbit acute but not prominent. 



The laminar expansion on the inner margin of the arm is small 

 and in the old male dentiform. The swollen palms are tuberciilate 

 or granulate inside and out; no definite marginal line above. Fin- 

 gers smooth on outer and inner surface, gaping their whole length, 

 very irregularly toothed, the largest tooth being one not far from the 

 basal end of each finger. 



Third leg a little more than twice as long as carapace, its merus 

 about three times as long as wide. The merus joints converge 

 slightly from the middle to the distal end. 



Abdomen of male subtriangular; appendages narrow and some- 

 what club-shaped at the extremity. 



Measurements. — Male (17295), length of carapace 24, width of 

 same 25.7, anterior width 24.7, superior width of front 13.6 mm. 



Ilahitat. — Fluviatile. Found in holes in perpendicular banks of 

 river (Stanton). Has been transported in a bunch of bananas to 

 Washington, District of Columbia. 



Range. — West Indies. From Vera Cruz, Mexico, to Nicaragua. 

 South America (probably Rio de Janeiro). West coast of Central 

 America ( ? ) . 



