38 BULLETIN 138, UNITED STATES NATIONAL MUSEUM 



B^ Edge of front bilobed, each lobe with a small tooth at inner angle. 



First antero-lateral tooth acute ; second tooth or lobe with a long 



posterior slope soledadensis, p. 41. 



PILUMNOPLAX CARMANAHENSIS, new species 

 Plate 9, figs. 1-4 



Description. — The dorsal surface of carapace and chelipeds has 

 been worn or ground off (pi, 9, fig. 2) ; the regions are fairly well 

 shown especially the hepatic region which is nearly oblong, its 

 anterior margin appearing like a ridge above the deep furrow behind 

 the orbit; this furrov/ is continued around the orbits and front. 

 Gastric region well marked, and also the anterior part of the meso- 

 gastric region which is very narrow with parallel sides and then 

 tapers gradually to a sharp point; cardiac and metagastric regions 

 indistinct. A linear median impression on the surface of the f}-ont ; 

 a broad furrow separates the surface of the front from that of the 

 orbit. Edge of front transverse ; orbit oblique, its details obscure ; 

 outer angle of orbit almost a right angle and. much less advanced 

 than the front. Including the orbital tooth there are on the lateral 

 margin five teeth or protuberances as there are also in most of the 

 Panopeids; the second is a shallow lobe which is fused Avith the 

 first or orbital tooth to form a sinuous margin; the last three teeth 

 are dentiform, thick and blunt, the last one the smallest, about oppo- 

 site the widest part of the metagastric region. 



Chelipeds very unequal, the right the larger (pi. 9, fig. 3), Its 

 merus extends obliquely forward to the line of the front, and is thick 

 and high, the outer surface roimding into the lower surface; just 

 within the oblique distal margin of th.e outer surface there is a deep 

 smooth furrow, and the lower distal angle is produced in a promi- 

 nent articulating lobe set off by a groove; surface of merus irregu- 

 larly granulate. Carpus also granulate on the small piece of sur- 

 face remaining (pi. 9, fig, 1) ; the angle of the inner margin is 

 situated behind its middle, as is so frequently the case in this and 

 related genera; a deep furrow parallel to distal margin, I\Ianus 

 very high, moderately compressed, widening distally, upper surface 

 convex, smoothly rounded, lower margin nearly straight, surface 

 covered with very fine granules arranged in a reticulating pattern. 

 Of the fingers only a small bit of the proximal end of each remains ; 

 they are black and more closely granulate than the palm; the dac- 

 tylus shows a superior punctate groove and a deeper lateral (outer) 

 groove, also a row of punctae between grooves. The merus of the 

 left or minor cheliped reaches very little farther forward than the 

 third of the five lateral teeth of the carapace ; the carpus has in its 

 dorsal aspect less than half the area of the major carpus; v/hile 

 the palm is only about half as high as the major palm, is consider- 



