110 BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Chelipeds short and stout, especially the merus, partly hairy in- 

 side, palm hairy outside in the distal part and in two bands leading 

 toward carpus; palms very thick, protuberant inside at the middle; 

 fingers stout, meeting when closed, tips hooking by each other; dacty- 

 lus with a granulate, pubescent rim above, a shallow, basal tooth 

 below which fits an excavation in the thumb. 



Edges of legs more or less pubescent ; on the second and third paiivs 

 a line of long hairs applied to the posterior surface of carpus and 

 propodus, and attached near upper edge of the latter and obliquely 

 on the surface of the former; first leg very large and thick, fourth 

 very small, not exceeding merus" of third, second and third more 

 nearly of a size ; all the dactyli are similar, falcate, and when flexed 

 fit closely in a corresponding groove on the propodus, which in the 

 first three pairs has a rounded end, but in the last pair is broadly 

 truncate and as broad as long. 



Abdomen broad at base, covering greater part of sternal width; 

 third segment widest, ends rounded and longer than middle part; 

 fourth segment partly invaginated in third; sides of abdomen con- 

 cave from fourth to angle near base of seventh ; latter very long, with 

 rounded extremity. 



Description of female. Like male, except for the abdomen ; this 

 is small compared to sternum, widest at third segment, after that sub- 

 triangular with concave sides, last segment almost an equilateral tri- 

 angle with blunt point ; segments 1 to 6 of subequal length ; margin 

 fringed with long hair. 



Color. Specimens in alcohol show small, brownish pigment spots. 



Measurements. Male holotype, length of carapace 4, width of 

 eame 8.3 mm.; female (48711), length of carapace 3.5, width of same 

 8 mm. 



Habitat. Free-swimming, as all the specimens examined from 

 Cuba were taken in plankton with a submarine light. 



Range. Cuba; Gulf of Mexico. 



Material examined. Taken on the northwest coast of Cuba, by 

 Henderson and Bartsch while on the Tomas Barrera Expedition 

 May, 1914 ; as follows : 



Off Santa Lucia; May 12; 1 male, 3 females (48711). 



Los Arroyas; May 19-20; station 8; 1 male holotype, 1 female 

 (48710), 1 female (48709), 1 female (48712). 



Ensenada de Cajon, off Cape San Antonio; May 22-23; station 

 11; Imale (48713). 



Gulf of Mexico: West coast of Florida; lat. 28 45' 00" K; long. 

 85 02' 00" W.; 30 fathoms; gy. S. brk. Co.; Mar. 15, 1885; station 

 2405, Albatross; 1 female young (5016G). 



