456 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.21 



cylindrical, coiled, scarcely tapering, groove open throughout most of 

 length ; a double row of stout setae at lip of groove basally, surface else- 

 where with scattered short setae. Male second pleopod of a length greater 

 than the first ; corneous tip greatly elongated, its concave surface chan- 

 neled. 



Description: Carapace subtriangular, about five-eighths as long as 

 wide, rostrum bluntly rounded and deflexed. Protogastric regions high, 

 median sulcus eroded ; mesogastric region less high, semiconical poste- 

 riorly, a wide deep pit on each side. . . . Cardiac region depressed, out- 

 lined with erosions and mushroomlike tubercles. Posterior border eroded, 

 a depressed tooth on each side of first abdominal segment. Ridge joining 

 frontal and branchial regions with two closed sutures. Hepatic region 

 obliquely vertical, projecting downward in a broadly triangular lobe. 

 Anterolateral margin with eleven or twelve granulated, serrate-edged 

 teeth, those on the posterior half largest. Posterolateral margins tangent 

 to anterolateral, teeth similar but interlaced and coalesced to form a 

 subentire line. 



Chelipeds about twice the length of carapace; merus roughly trigo- 

 nous, three quarters the length of carapace, upper surface depressed, 

 punctate, and lobed, inner margin with three or four granulate lobes, 

 outer proximal margin with three or four eroded spines, a small median 

 lobe and a larger subdistal lobe ; carpus with two or three inner marginal 

 lobes, outer surface lumpy; manus subequal in length to carapace, trian- 

 gular in cross section, three large lobes on upper, inner margin, the 

 median largest and projecting over palm, distal upper end of hand 

 raised and lumpy, outer surface of palm with four longitudinal rows of 

 granulous lobes, the upper two rows largest, the remaining rows smaller 

 and extending onto the pollex. Pollex on major hand deflexed, short, 

 stout, tip subbifid, unarmed, inner edge forming a right angle within 

 gape; dactyl granulous, slightly curved, and armed with three inner 

 lobes, the proximal largest ; fingers widely gaping. Pollex of minor hand 

 subhorizontal, outer surface tuberculate, subtriangular from base to 

 apex, cutting edge sharp and denticulate; dactyl nearly straight on pre- 

 hensile margin, an upper proximal granulous lobe, outer surface tuber- 

 culous and eroded, fingers not gaping. 



Outer maxillipeds eroded and tuberculate, with longitudinal sulci, 

 distal anterior margin of merus produced. Sternal pit semioval in male, 

 the abdomen not intruding; sternal pit in female more circular, a con- 

 tinuation of sternal trench, entered by bent tip of abdomen. Sternum 

 eroded and granulate. 



