308 BULLETIN 152, UNITED STATES NATIONAL AIUSEUM 



Range. — From Cape Hatteras, North Carolina, to Pensacola, 

 Florida; 6% to 45 fathoms. 



Material examined. — See table, page 309. 



LEPTODIUS TRIDENTATUS Lenz 



Plate 143, Figures 1-4 



Leplodius tridentatus Lenz, Zool. Jahrb., 1902, Suppl. 5, p. 761, pi. 23, figs. 7 and 

 7a (type-locality, Juan Fernandez; type in Lubeck Mus.). 



Leptodius spinoso-granulahis Lenz, Zool. Jahrb., 1902, Suppl. 5, p. 762, pi. 23, 

 figs. 8 and 8a (type-locality, Juan Fernandez; type in Lubeck Mus.). 



Diagnosis. — Three lateral teeth of fair size, the last two ending in 

 a movable spine. Carapace not lobiilated. Legs spinulous. 



Description.— Sui'isice of anterior half of carapace finely granulate, 

 with some transverse and oblique lines of granules; one row immedi- 

 ately behind the frontal lobes. Front notched at middle, lobes con- 

 cave, forming four rounded tubercles, one at either end of each lobe, 

 the margin between feebly granulate. Outer angle of orbit not denti- 

 form. Antero-lateral region granulate; first marginal tooth very 

 small, acute, distant from the orbit and from the second tooth. 

 Second, third, and fourth teeth strongly curved, the third the largest, 

 third and fourth tipped with a small articulating spine. Postero- 

 lateral margin nearly straight. 



Chelipeds: Merus feebly granulate, a row of denticles above; 

 carpus tuberculate varying to simply rugose and with a large and a 

 small tooth on inner margin. Hand rough above and on upper half 

 of outer face with tubercles and rugae, varying to rugae only, when it 

 has an eroded appearance. Dark color of immovable finger ending 

 in a straight line running obliquely back from the interdigital sinus to 

 the lower margin. Legs sparsely hairy, spinulous on upper border. 



Color. — Variable. Of the specimens collected December 8, Doctor 

 Schmitt says: Largest one (about 13 mm. wide) burnt umber, with 

 mummj^ brown fingers and more or less brick red hands; a smaller one 

 is more of a seal brown, hands a sort of dark maroon purple, fingers 

 decidedly hazel; legs of both bister. One 8 mm. wide has a seal 

 brown nearly black carapace and hands about the same color above 

 but flushed in front with dark prune purple a splotch especiallj' on 

 right hand near fingers; fingers bay; legs bister, cross-banded darker 

 and lighter. Smallest specimen, 4 mm. wide, pepper and salt color, 

 blackish and bistrish white contrasting. One 5.7 mm. wide is much 

 like the preceding but the carapace is more nearly all one color. 



Measurements. — Type-specimen, length of carapace 14, width 22 

 mm. (Lenz). Male (45971), length 7.4, width 11.3 mm. 



Range.- — Chile: From Arica to Puerto Corral; Juan Fernandez 

 Islands. 



Material examined. — 



Arica; C. E. Porter; 3 males, 3 females, 4 young (45971). 



