230 BULLETIN 129, UNITED STATES NATIONAL MUSEUM 



has three spinules transversely arranged; second has two median and 

 one hxteral; third and fourth have a median tubercle; sternum with 

 four spinules in front of abdomen. 



Chelipeds nearly twice length of carapace; ischium, merus and 

 carpus spiny; hand broad, upper margin spinulous; lower margin 

 with a tooth near articulation ; fingers flattened laterally, broad, pre- 

 hensile edges dentate, acute, narrowly gaping for half their length. 

 Legs slender, first nearly three times length of carapace, fourth about 

 one-half length of first. 



Measurements. — Male (11400), median length of carapace 14.5, 

 length including horns (tips broken off) 15.7, width without spines 

 13 mm. 



Range. — -Little Bahama Bank; St. Thomas; St. Croix; Nevis; 

 Barbados. Depth, 82 to 338 fathoms. 



Material examined. — See table, page 227. 



Genus LEUROCYCLUS Rathbun 



Salacia Milne Edwards and Lucas, d'Orbigny's Voy. I'Am^r. Merid., vol. 



6, pt. 1, Crust., 1843, p. 12; type, S. tuberculosa Milne Edwards and 



Lucas. Salacia preoccupied by Lamouroux, Hist. Pol. Coral. Flex., 



1816, p. 212. 

 Leurocyclus Rathbun, Proc. Biol. Soc. Washington, vol. 11, 1897, p. 164 



(substituted for Salacia). 



Carapace broader than long, suborbicular, depressed, regions well 

 marked. Rostrum very small, subtriangular. Orbits directed for- 

 ward; postocular cup large, separated from the scarcely projecting 

 inner margin of the orbit by a triangular sinus. Basal segment of 

 antenna very wide, wider than the space between it- and the post- 

 ocular tooth, and having a blunt tooth at the antero-external angle; 

 the movable portion is entirely visible in dorsal view beside the 

 rostrum. Epistome rudimentary. Ischium of outer maxillipeds 

 broad, inner margin denticulate; merus cordiform. Chelipeds short; 

 palm much swollen; fingers long, slightly curved, inner margins 

 denticulate. Ambulatory legs very long, spinulous; merus subcy- 

 lindrical, propodus compressed, dactylus long, slender, compressed^ 

 and slightly curved. Sternal plastron much wider than long. Sixth 

 and seventh segments in male abdomen fused; in female, fifth, sixth, 

 and seventh fused. 



Contains only two species. 



LEUROCYCLUS TUBERCULOSUS (Milne Edwards and Lucaa) 



Plate 232, figs. 6-11; plate 233 



Salacia tuberculosa Milne Edwards and Lucas, d'Orbigny's Voy. I'Am^r. 

 M6rid., vol. 6, pt. 1, Crust., 1843, p. 13; atlas, vol. 9, 1847, pi. 2 (type- 

 locality unknown; Chile?; holotype in Paris Mus.). — A. Milne Edwards 

 and BouviER, Mem. Mus. Comp. Zool., vol. 47, 1923, p. 387, pi. 12, 

 fig. 5. 



