BAHAMA CRUSTACEA. 227 



4. Uca stenodactyla (M. Edwards et Lucas). 



Gelasimus stenodactylus, M. Edwards et Lucas in D'Orbigny's 

 Voyage, 1843. 



Kingsley : 1. c, 1880, p. 154. Ortmann : 1. c, p. 760, 1894. 



{ct) I $ . Common in mud on west side of Andros Island, 

 near Red Cays, Apr. 17, '90. 



Range : West Indies, Central America, East and West Coasts. 



Collected at Cuba. 



5. Uca leptodactyla (Guerin MS.). 



Gelasimus Icptodactylus Guerin MS. (types in Phila. Acad.). 



Gelasimus stenodactylus Kingsley, Proc. Acad. Nat. Sci., 

 Phila., p. 155 (part), 1880. 



(a) 10 c^ , 5 9. Holes in sand between tides about 5-6 in. 

 deep, very shy, near Ft. Montagu, Nassau, N. P., Jan. 28, '90. 



Some of these specimens were sent to the United States Na- 

 tional Museum, where they were identified by Miss Rathbun, 

 and to whom I am indebted for the following note of descrip- 

 tion : 



" Uca leptodactyla belongs to the division of the genus in 

 which the front between the eyes is broad and the body is short, 

 broad and subcylindrical. It is most nearly related to U. stenodac- 

 tyla ; the chief differences are as follows : In U. stenodactyla the 

 body is much higher than in leptodactyla, being usually higher 

 than long. The anterior margin of the carapace from the base 

 of the eycstalk to the antero-lateral angle is much more oblique 

 in leptodactyla, and the lateral margins are much more convergent 

 posteriorly. The carapace of leptodactyla is, therefore, more 

 pentagonal than that of stenodactyla. In stenodactyla the lateral 

 margin is much dilated behind the antero-lateral tooth, which is 

 not the case in leptodactyla. The inner surface of the hands 

 differs as follows : The short ridge on the palm at the base of 

 the dactylus is perpendicular to the base of the propodos in 

 leptodactyla ; while it is oblique in stenodactyla. In both species 

 the tubercular ridge running obliquely upward from the lower 

 margin makes an angular turn at the middle of the inner surfaces, 

 and is continued until near the upper margin. In leptodactyla 



