382 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Front one-twentieth of the width of the carapace. Orbits more 

 oblique than in U. maracoani; lower margin turreted. 



Upper border of arm of large cheliped of adult male rounded, 

 sparsely granulate, inner border limbed, limb dentate at the distal 

 end ; outer border tuberculo-dentate. Wrist coarsely granulate, inner 

 edge dentate. The propodus is one and one-half times as long as the 

 width of the carapace, and nearly three times as long as wide ; palmar 

 portion covered with low tubercles or coarse granules, which become 

 reduced on the fingers to granules not distinguishable by the naked 

 eye. The pollex has a submarginal, besides a marginal, row of gran- 

 ules, which extends half the length of the palm; width of pollex 

 uniform for more than its basal half, then tapering to the slightly 

 curved tip; the middle row of prehensile tubercles is replaced by 

 teeth on this terminal portion, the first tooth the largest. The 

 dactyl us is regularly tapering and has a tooth just posterior to the 

 middle of its prehensile edge. Fingers gaping, gape diminishing to 

 the overlapping tips. The ambulatory legs of the female differ from 

 those of the male in having the surface and margins rougher and in 

 the upper and lower margins of the merus joint and the upper mar- 

 gin of the carpus and half the propodus of the last pair furred with 

 short hair. 



Measurements. Male (11375), length of carapace 19, width of 

 same 34 mm.; female (11375), length of carapace 13.5, width of 

 same 23.3 mm. 



Habitat. In mangrove marshes (Desbonne). 



Range. Bahamas and Cuba to Brazil. 



Material examined. 



Watling Island, Bahamas; 1886; Albatross; 6 males, 1 female 

 (11375). 



Baracoa, E. Cuba; tidal flat; Jan. 29, 1902; William Palmer; 6 

 males, 1 female (25549). 



Jamaica; E. A. Andrews; 1 male (42918). 



Other records. Mexico (Kingsley) ; Guadeloupe (Desbonne) ; 

 Cayenne (Milne Edwards) ; Brazil (Seba, Shaw). 



UCA PRINCEPS (Smith). 



MAJESTRO-SASTRE OR MASTER-TAILOR (Coker). 

 Plate 133 ; plate 1GO, fig. G. 



Gelasimus princcps SMITH, Trans. Connecticut Acad. Arts and Sci.. vol. 2, 

 1870, p. 120, pi. 2, fig. 10, pi. 3, figs. 3-3c (type-locality, Corinto, west 

 coast of Nicaragua; type in Mus. Coinp. Zool.). LOCKINGTON, Proc. 

 California Acad. Sci., vol. 7, 1S7G (1877), p. 14G [2]. 



fGelasimns platudactylus SAUSSURE, Rev. et Mag. Zool., ser. 2, vol. 5, 1853, 

 p. 302. 



Uca plati/dactyla ORTMANN, Zool. Jahrb., Syst., vol. 10, 1897, p. 34G (part). 



Gelasimus Itctcrochclcs KINGSLEY, Proc. Acad. Nat. Sci. Philadelphia, 1SSO, 

 p. 137 (part). 



