THE GRAPSOID CRABS OF AMERICA. 421 



Description. A small, semicylindrical species. Carapace strongly 

 narrowed behind ; surface smooth, depressions shallow. Front about 

 one-fourth width of carapace, its anterior border subtruncate. Upper 

 margin of orbit very oblique, slightly sinuous. Eyebrow partly vis- 

 ible from above. Carapace widest at the antero-lateral angles, which 

 are prominent and acutangular or rectangular. Side margins straight 

 or a little concave in front ; then after a very obtuse angle they form 

 a sinuous line. 



The merus of the large cheliped of the male is longer than the 

 carapace and bears short and fine, granulated rugae. The carpus and 

 nianus are coarsely granulate above, the granules of the palm be- 

 coming smaller on the outside. The palm turns over rather abruptly 

 above. Fingers one and one-half times as long as palm, narrow ; a 

 large tubercle at middle of dactylus, another at its basal fourth ; be- 

 tween these two there is a low tooth on the pollex, and another sub- 

 terminal. A coarsely tuberculate ridge on inner side of palm, upper 

 half transverse, lower half oblique as usual. Surface distal to the 

 ridge smooth. 



Merus joints of ambulatory legs more dilated than in U. steno- 

 dactylus. Legs crossed by transverse bands of dark spots. Third to 

 sixth abdominal segments in male more or less fused. 



Measurements. Male (24546), length of carapace 6, width of 

 same 9.8 mm. 



Range. West coast of Florida; Bahamas; West Indies; Mexico 

 to Santos, Brazil. 



Material examined. 



West Florida; J. E. Benedict; 1901; 1 female (25557). 



Green Turtle Cay, Bahamas; E. A. Andrews; 4 males (22314). 



Near Fort Montagu, Nassau, New Providence, Bahamas; holes in 

 sand bet\veen tides about 5-6 inches deep; Jan. 28, 1890; J. I. North - 

 rup; 1 male, 1 female (22315). 



New Providence, Bahamas; Albatross; 3 males (11384). 



Baracoa, Cuba; tidal flat; Jan. 29, 1902; Wm. Palmer; 2 males, 2 

 females (25548). 



Jamaica; T. H. Morgan; 4 males, 1 female (22316). 



San Antonio Bridge, San Juan, Porto Rico; Jan. 14, 1899; Fhh 

 Hawk,- 13 males. 9 females (24546). 



Fajardo, Porto Eico; Feb. IT, 1899; Fish Hawk; 1 female (24549). 



Ensenada Honda, Culebra, Porto Rico ; Feb. 9, 1899 ; Fish Hawk; 

 1 female (24548). 



Mexico; T. B. Wilson; 3 males, labeled by Guerin (Mus. Phila. 

 Acad.). 



Amarracao. State of Paiuhy, Brazil; 1913; Fr. Iglezias; 1 male 

 (48894). 



