CRUSTACEA FROM THE BAHAMAS 



71 



Range : West Indies, Central America, east and west coast. - 

 Collected at Cuba. 



5. Uca leptodactyla (Guerin Ms.) 



Gelasimus leptodactylus Guerin Ms. (types in Phila. Acad.). 



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

 p. 155 (part), 1880. 



(a) 10 ^ , 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 National 

 Museum, where they were identified by Miss Rathbun, and to whom 

 I am indebted for the following note of description : 



" 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 sub- 

 cylindrical. It is most nearly related to U. stenodactyla ; the chief dif- 

 ferences 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 eyestalk to the antero- 

 lateral angle is much more oblique in leptodactylo, and the lateral mar- 

 gins are much more convergent posteriorly. The carapace of lepto- 

 dactyla 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 this continua- 

 tion runs parallel to the line of tubercles at the base of the dactylus ; 

 in stenodactyla the continuation is directed obliquely towards the line 

 at the base of the dactylus." 



Family Gecarcinidae Dana 



6. Gecarcinus ruricola (Linnaeus) 



Cancer ruricola Linnaeus, Sys. Nat. Ed. 10, 1, p. 626, 1758. 

 Gecarcinus ruricola Leach. Edin. Encyc, VII, 430, 1814. Ort- 

 mann. I.e., p. 740, 1894. 



