524 



BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



margin with two or three beadhke tubercles similar to those in the 

 hepatic row; lower margin granulate or crenulate. A subhepatic 

 spinule or denticle. Median sinus of front V-shaped, margin of lobes 

 arcuate, finely granulate; outer tooth small, a reddish tubercle at tip. 

 Upper margin of arm Avith a strong sub terminal tooth. Wrist 

 densely furred, except in a narrow groove parallel to distal margin, 

 and bearing a number of large tubercles plainly visible of which there 

 is in the major cheliped about 26 behind the groove and 11 in front 

 of it. Hands of female very unequal, naked, sparingly dotted on the 

 outer surface with tubercles, except on lower third of major hand, 

 and a smaller area at proximal end of minor hand, which are smooth. 

 Major dactylus with tubercles above at the basal end. Fingers of 

 minor chela deeply furrowed, three ridges on dactylus granulated for 

 half or two-fifths their length, one ridge on fixed finger granidated 

 for half its length. Legs long-hairy, upper surface of carpal and 



propod al segments 

 flattened and paved 

 with depressed acorn- 

 shaped tubercles. 



Measu rement s . — 

 Female holotype, en- 

 tire length of carapace 

 6, entire width of same 

 8.8 mm. 



Range. — Porto 

 Rico. 



Material examined. — Arroyo, Porto Rico; 1899; Fish Hawk: Feb- 

 ruary 4; 1 ovigerous female, holotype (23770). On Lighthouse reef; 

 February 3; 1 young (24241). 



PILUMNUS STIMPSONH Miers 



Plate 205, Figures 5 and 6 



Pilumnus marginatus Stimpson, Ann. Lye. Nat. Hist. New York, vol. 10, 187U 

 p. 109 [19] (type-locality, Cape St. Lucas; type not extant). 



Pilumnus stimpsonii Miers, Challenger Rept., Xool., vol. 17, 1886, p. 147; name sub 

 stituted for P. marginatus Stimpson 1871, preoccupied by Stimpson himself 

 in 1858 for another species from Loo Choo. 



Diagnosis. — Small, one-fourth wider than long. Carapace tuber- 

 culate, sparsely hairy; antero-lateral margin short, four-toothed or 

 spined. No subhepatic tooth. Both palms rough outside. 



Description. — A very small species. Carapace somewhat hairy, 

 moderately convex; middle gastric region distinctly outlined, others 

 less so; surface regularly covered with small, mostly distant, acute 

 tubercles, between which the surface is very minutely punctate. 



Figure 82.- 



-PlLUMNUS NUDIMANUS, FEMALE HOLOTYPE. 

 6. CARAPArE. 



Chela. 



