NO. 2 WALTON : THE GENUS PYLOPAGURUS 157 



hand covered quite uniformly with upright, pointed granules, those on 

 opercular surface slightly larger; fingers elongate, crossed at tips, dactyl 

 five eighths total length of hand, longitudinally contorted, pollex one 

 half total length of hand, with prominent tubercle on cutting edge. 



Minor cheliped much reduced, reaching to about the middle of carpus 

 of major cheliped ; merus and carpus slightly setose and hardly more 

 expanded than corresponding articles of ambulatory legs; carpus armed 

 on superolateral margin with row of strong forward-curving spines; 

 propodus quite narrow, flaring abruptly to widest portion at base of 

 fingers; dactyl almost twice the length of propodus, strongly convex in 

 outline; both fingers armed with regular chitinous denticles on cutting 

 edge, gaping at base, and furnished with many tufted setae on under 

 surface. 



Precervical portion of carapace broader than long, very convex, 

 smooth, polished, median projection quite long and acute, extending be- 

 yond bases of eye scales, lateral points angular, shorter than median; 

 postcervical portion naked, membranous. 



Eyestalks short, cylindrical, constricted in middle and then widening, 

 diameter at base of cornea greater than at basal portion, cornea large, 

 dilated ; ophthalmic scales convex, acute, with prominent, sharp, sub- 

 terminal spine. 



Antennal acicles slender, pointed, outward-curving, slightly setose, 

 equaling or slightly exceeding length of eyes; peduncles when extended 

 with proximal portion of terminal article even with base of cornea; 

 flagellum setose. 



Antennular peduncles very long, exceeding eyestalks by more than 

 one half length of terminal segment, dorsal flagellum of about twenty- 

 four annulations, densely setose beneath, inferior flagellum evenly taper- 

 ing, about two thirds length of superior. 



Ambulatory legs longer on right side, very slightly setose, merus 

 unarmed on dorsal surface; carpus slightly shorter, with row of sharp 

 spines on dorsal surface ; propodus of first pair armed with similar spines, 

 but propodus of second pair unarmed; dactyli of both pairs flattened, 

 spinulose, and longer than related propodus. 



Fourth pair of thoracic legs subchelate, minute dactyl not bearing 

 rasp as does pollex and distal portion of palm ; fifth pair minutely chelate, 

 rasp covering both fingers and propodus. 



Abdomen as long as carapace, membranous; terga membranous, not 

 in contact; caudal shield calcified, suture flexible, anterior tergum 

 smooth, posterior corners produced slightly, posterior tergum similar in 

 shape, slightly smaller, with a few tufts of setae on lateral and terminal 

 borders. 



