1 14 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 24 



about one and a half times as long as wide or a little less, proximal 

 two-thirds of anterior margin with three or four narrow, well separated, 

 strongly projecting conical teeth ; manus with two strong dorsal crests 

 and a third along outer margin ; merus of walking legs unarmed. 



Description: Carapace subquadrate, margins subparallel posterior 

 to epibranchial angles; plicate on posterolateral regions, otherwise 

 nearly smooth. Frontal groove, and grooves defining protagastric and 

 hepatic regions, strongly accentuated. Front trilobate, the lobes 

 rounded, about equal in breadth, median lobe projecting beyond lat- 

 eral lobes, sometimes rather strongly so ; frontal region deflexed, some- 

 times making front appear sinuate in dorsal view. Orbits shallowly con- 

 cave; outer orbital angle not produced. No epibranchial spine. Carapace 

 finely pubescent in young specimens, adults with a trace of hairs on 

 frontal region. 



Movable segments of antenna smooth or nearly so, the first bear- 

 ing a low crest on anterior margin, second and third without projec- 

 tions; flagellum with long hairs. Outer maxillipeds faintly rugose. 



Merus of chelipeds lightly rugose, armed on anterior margin with 

 a strongly projecting granular lobe. Carpus about one and a half times 

 as long as wide or a little less, anterior margin with three or four 

 narrow, well separated, strongly projecting conical teeth, distal one usu- 

 ally the smallest, these teeth granular and confined to proximal two- 

 thirds of margin ; surface strongly granular, with two heavy longitudinal 

 crests composed of oblique, elongate granules; a third strong crest along 

 posterior margin, composed of an irregular double row of obliquely 

 elongate granules, sometimes produced into spinules, giving margin a 

 serrate appearance; deep grooves between these crests, that between dor- 

 sal crests extending to level of proximal carpal tooth, that between me- 

 dian dorsal and posterior crests extending to articulation with merus. 

 Manus with three heavy crests, obliquely granulate as in carpus or 

 nearly smooth; one along outer margin and two on upper surface, the 

 latter joined at proximal end; these crests defined by deep grooves. 

 Gape of fingers with a short pubescence. 



Walking legs smooth or punctate. Merus unarmed, anterior margin 

 with a short fringe of plumose hairs and with scattered, long non- 

 plumose setae near posterior margin, that of leg 3 slightly inflated; 

 other segments rather thickly covered with long and short setae. 



Material examined: See Table 35. 



