344 



BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



three anterior disposed transversely and the single posterior tubercle 

 on the median line; two longitudinal prominences on the interorbital 

 space. An inconspicuous tubercle on the hepatic region makes a 

 slender prominence outside; a marginal tubercle behind the branchio- 

 hepatic suture. Otherwise the branchial regions are smooth, except 



toward the gastric and cardiac sutures: 

 where they are a little rugose. The 

 rostral horns are a little deflexed, slen- 

 der, flattened, with convex outer margins 

 and lying almost parallel to each other; 

 interspace deep and narrow, rounded at 

 base. Fronto-interorbital space wide; 

 superior orbital margins rounded. An- 

 tennae fringed with long hair. 



Merus of chelipeds of adult male slen- 

 der and unarmed; carpus a little rugose; 

 hand smooth, laterally compressed, with- 

 out crests; fingers slender, gaping, the 

 dactylus having near its base a stronger 

 tooth than the others. In the female 

 the fingers meet and have no large basal 

 Ambulatory legs, short, stout, subcylindrical, fringed with 



Fig. 



109.— Thersanurus 

 (48744), MAxrLLiPED, X 17.1 



COMPRESSUS 



tooth. 



long hair on each side, which gives them a broad, flat appearance; 

 those of the first pair notably longer than the others, those of the 

 second pair scarcely reaching the extremity of the merus of the first; 

 those of fifth pair shortest. 



Color, — Greenish or brownish (Desbonne). 



Measurements. — Male (A. Milne Edwards), length of carapace 23, 

 width of same 16, length of cheliped 23, of first pair of ambulatory 

 legs with the dactylus folded 20, of the next leg in the same position 

 12 mm. 



Range. — ^West Indies. 



Material examined. — 



Cuba, on reef Lavesos Italienos, opposite Cayo Lavesos; 2 to 3 

 fathoms; Co. R. S.; June 2, 1914; station 14, Tomas Barrera Expe- 

 dition; Henderson and Bartsch; 1 male, soft shell (48744). 



Guadeloupe; 1 male, cotype (Paris Mus.). 



West Indies; 1 female, soft shell (Copenhagen Mus.). 



