212 U.S. NATIONAL MUSEUM BULLETIN 292 



small sharp spine at distomesial angle (fig. 71e). A small- to medium- 

 sized species, maximum carapace length in midline about 18 mm. 



Habitat. — Mud flats. 



Distribution. — Curagao, Venezuela, Surinam. 



Remarks. — The two lots of specimens from Curasao reported as 

 Uca speciosa by Rathbun (1918, p. 409; 1924, p. 19) prove to be 

 U. cumulanta; the species had not been recorded previously from any 

 of the West Indian islands. 



86. Uca leptodactyla Rathbun 



Figures 7lg, h 



Uca leptodactyla Rathbun, in Rankin, 1898, p. 227 [type-locality: Nassau, New 



Providence I., Bahamas]. — Rathbun, 1918, p. 420 pi. 156. 

 Gelasimus lepiodactylus (Gu^rin ms). — Rathbun, in Rankin, 1898 p. 227. 



Diagnosis. — Carapace broadly pentagonal, less than two-thirds as 

 long as wide, practically semicylindrical longitudinally in midline, 

 surface smooth and polished, without pubescence; fronto-orbital 

 distance representing maximum carapace width; front widening toward 

 base, not subspatulate, width between posterodistal angles of basal 

 segments of eyestalks, with eyes retracted, slightly less than one- 

 third of fronto-orbital distance; lateral marginal ridges strongly and 

 slightly sinuously converging posteriorly from outer orbital angles. 

 Cornea moderately swollen, occupying about one-third of extensor 

 surface of distal segment of eyestalk. Chehpeds greatly dissimilar and 

 unequal in males, small and subequal in females; fingers of major 

 chela of male much longer than palm, slender, Avidely gaping, not 

 unusually compressed. Walking legs almost completely devoid of 

 pubescence. Hair-fringed ventral opening present between coxae of 

 third and fourth pereiopods. Denuded fii-st pleopod of male terminat- 

 ing, in posterior view, in beaklike tip directed laterally (fig. 71g). 

 A small species, maximum carapace length in midline about 7 mm. 



Habitat. — Tidal mud flats. 



Distribution. — Western Florida to Estado de Santa Catarina, 

 Brazil (Green Turtle Cay, Bimini Is., New Providence I., Cuba, 

 Jamaica, Puerto Rico, Saint Croix). 



Remarks. — It seems obvious that the selection of the specific name 

 of this species was intended as adoption of Guerin's manuscript 

 name, a noun in apposition to the generic name, which therefore 

 should have been spelled "leptodactylus." There is no absolute proof from 

 the original description, however, that this was the intention, and we 

 have therefore followed the advice of L. B. Holthuis to use the original 

 spelling of the name. This decision was influenced further by the fact 

 that Rathbun used this spelling in 1918, even though another species 

 in the same genus was spelled "stenodactylus" in that pubUcation. 



