202 



U.S. NATIONAL MUSEUM BULLETIN 29 2 



Material examined. — The Dominican collections contain 3 males 

 (carapace lengths 55.2-68.8 mm) and 6 females (cl 9.0-68.8 mm). 



Ecological notes. — See under Gccarcinus lateralis. 



Distribution. — Southern Florida, West Indies, Nicaragua (Andros 

 I., San Salvador I., Rum Cay, Cuba, Jamaica, Navassa I., His- 

 paniola, Puerto Rico, Saint Croix, Saba, Montserrat, Dominica, 

 Barbados, Curasao, Isla de Providencia, Swan Is.). 



Dominica Stations: 6, 38, 82, 93 (0-200 ft.). 



Figure 67. — Denuded terminal portions of male right first plcopods : a, Cardisoma guanhumi, 

 specimen shown in figure 64, posterior view; b, same, lateral view; c, same, anterior view; 

 d, Gecarcinus lagostoma (carapace length 48.0 mm) from Trinidad (R. Welles, Jr.), posterior 

 view; e, G. lateralis, specimen shown in figure 65, posterior view; /, same, lateral view; 

 g, same, anterior view; h, G. ruricola, specimen shown in figure 66, posterior view; i, 

 same, lateral view; /, same, anterior view. 



Family Ocypodidae 

 Subfamily Ocypodinae 



Key to the Species 



Fronto-orbital distance barely two-tliirds of maximum carapace width; no 

 specialized hair-fringed ventral opening between coxae of third and fourth 

 pereiopods Ucides cordatus (p. 219) 



Fronto-orbital distance at least nine-tenths of maximum carapace width; 

 specialized hair-fringed opening between coxae of third and fourth pereio- 

 pods 2 



