92 SMITHSONIAN MISCELLANE^OUS C0LLE;CTI0NS 



are two smooth, oblong longitudinal ones on the anterior part of the 

 gastric region just behind the front. These, as well as two near the 

 anterior corners of the carapax, are ver}' prominent. Lateral margin 

 anteriorly with five tuberculiform or paxilliform teeth, the posterior 

 two smooth, the two next anteriorl}- prominent and setose, the an- 

 terior one small, forming the angle of the orbit. Front deflexed, 

 with a supramarginal fringe of long hairs ; margin curved and 

 notched at the middle. E3'^e peduncles setose. The grooves sepa- 

 rating the posterior teeth of the lateral margin are continued for a 

 considerable distance upon the sub-branchial region, passing obliquely 

 forward. Chelipeds with the meros and carpus deeply sculptured 

 with setose grooves, dividing the upper side of each joint into five or 

 six prominent, smooth, wart-like protuberances. A small, sharp 

 tooth at the inner angle of the carpus. Outer surface of hand with 

 a setose coating, beneath which there are minute sharp granules 

 showing a tendency to arrangement in longitudinal rows. Ambu- 

 latory feet longitudinally grooved. Dimensions : Length of carapax, 

 0.22 ; breadth, 0.28 inch. 



This species occurred at Ousima. 



140. PILUMNOPLAX CILIATA Stimpson 



Pilnmnoplax cillata Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 94 [40], 

 1858. 



Description of a female : Anterior margins of body and feet densely 

 •ciliated with long hair-like setae. Carapax broad, somewhat nar- 

 rowed and flattened posteriorly. Proportion of length to breadth, 

 1 : 1.58. Upper surface even and nearly smooth, pubescent, a few 

 granules distantly scattered toward the margins. Seven short longi- 

 tudinal sulci on the frontal and supraorbital regions, the median one 

 arising from the frontal emargination. Front broad, with a supra- 

 marginal series of long setae continuous with those on the orbital and 

 antero-lateral margins. Orbit with two deep fissures at the outer 

 side, one above and one below the exterior angle ; a slight fissure also 

 on the superior margin. Antero-lateral margin with three deep 

 notches dividing four teeth, the anterior one being confounded with 

 the angle of the orbit ; teeth all broadly truncated with the exception 

 of the posterior one, which is small and sharp. Subhepatic region 

 "behind the orbit eroded or rugose. Basal joint of antennas rather 

 short. Chelipeds short, equal ; meros with a thin, sharp, irregularly 

 dentated superior crest ; carpus hairy, with the inner angle acute ; 

 "hand sharply granulated and setose, with the exception of its inner 



