32 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.18 



Maxilliped: inner plate not extending to middle of palp article 2, 

 apex with 2 chisel teeth and a smaller medial one ; outer plate reaching 

 to end of palp article 2, inner margin with 10 chisel teeth, rounded apex 

 with 6 spines, the outer 3 plumose. 



Coxae 1 to 3 : lower posterior angle slit. 



Gnathopod 1 : article 6 about three fourths as long as 5, article 7 

 two thirds as long as 6. 



Gnathopod 2: article 6 about one half as long as 5, article 7 about 

 one half as long as 6. 



Peraeopod 1 : anterodistal margin of article 4 produced ; article 7 

 half again as long as articles 5 and 6 combined. 



Peraeopod 2 similar to 1 but with generic differences. 



Peraepod 3 : posterior margin of article 5 with 2 sets of spines ; 

 posterior margin of article 6 with 1 or 2 spines. 



Peraeopod 4: posterior margin of article 5 with 3 sets of spines; 

 posterior margin of article 6 with 2 spines. 



Peraeopod 5 : inferior margin of lobe of article 2 rounded, extending 

 downward to junction of articles 4 and 5 ; article 3 subequal in length 

 to article 4, the latter with a posterior, setose lobe; articles 5 and 7 

 subequal in length; article 6 longer than 5, anterodistal edge of the 

 latter notched slightly. 



Uropod 1 extending backward to end of uropod 2 ; rami equal in size, 

 longer than peduncle ; inner margin of inner ramus spinulate. 



Uropod 2: rami subequal in length to peduncle; upper margins of 

 both rami spinulate, apex of outer ramus with a long spine. 



Uropod 3 : rami inflated ; outer ramus broader than inner, apex more 

 rounded, apical inner and outer margins setose; apex of inner ramus 

 slightly rounded, with a cusp at inner edge, outer and apical margins 

 setose. 



Telson: lobes tapering evenly to apex, apex notched, with 4 to 6 

 setules ; dorsal surface of each lobe with 7 or 8 bifid spinules. 



Pleon segment 3 : posterior margin convex, lower posterior angle 

 strongly produced into a tooth; dorsal surface of segment with 2 low, 

 lateral ridges which may extend anteriorly to pleon segment 1. 



Pleon segment 4 : posterior dorsal surface raised into a slightly saddle- 

 shaped process. 



Pleon segment 6 with small lateral ridges. 



Length of female 13 mm. 



Male: Antenna 2 about as long as body; pleon segment 3, dorsal 

 surface with a single medial ridge; pleon segment 4 more strongly pro- 



