24 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.18 



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

 thirds as long as 6. 



Peraeopod 1 rather stout; article 7 slightly longer than articles 5 

 and 6 combined; article 4, distal anterior angle slightly produced. 



Peraeopod 2 similar to 1, but with generic differences. 



Peraeopod 3 : article 2 rather wide ; posterior edge of article 5 with 



2 sets of spines ; posterior edge of article 6 with 2 spines. 



Peraeopod 4: article 2 rather narrow, appendage otherwise similar 

 to peraeopod 3 but with generic differences and posterior edge of article 

 6 with 3 spines. 



Peraeopod 5 : article 2 wide, lower edge of lobe asymmetrically 

 rounded, reaching downward to joint between articles 4 and 5 ; articles 



3 and 4 subequal in length, article 4 with a long, slender posterior setose 

 lobe ; article 6 longer than 5, article 7 subequal to 5 in length. 



Uropod 1 reaching to end of uropod 2 ; peduncle short, stout ; rami 

 much longer than peduncle; inner edge of inner ramus armed with 

 spinules, outer ramus unarmed. 



Uropod 2 : rami shorter than peduncle, outer ramus slightly shorter 

 than inner, armed apically with a small spine ; upper edges of both rami 

 spinulate, inner edge of inner ramus spinulate. 



Uropod 3 : rami lanceolate, outer somewhat narrower than inner, 

 both margins of both rami strongly setose. 



Telson cleft nearly three fourths of its length; lobes broad, apices 

 blunt, incised, each armed with 5 setules; dorsal surface of each lobe 

 with 2 or 3 setules. 



Pleon segment 3: posterior edge strongly convex, lower posterior 

 corner rounded; dorsal surface of segment with a single, small ridge. 



Pleon segment 4: dorsal posterior surface with a strong, massive 

 carina; posterior angle subacute. 



Pleon segment 6: lateral ridges strongly developed. 



The urosome segments are considerably shortened, the urosome 

 being rather small in size. 



Description of female: Antenna 1, article 2 of peduncle almost twice 

 as long as article 1 ; article 5 of peduncle almost three fourths the length 

 of article 4; article 3 of mandibular palp almost two thirds as long as 

 article 2; inner edge of outer plate of maxilliped with 6 chisel teeth, 

 rounded apex with 5-6 setal spines, the 2 outermost plumose ; article 5 

 of peraeopod 5, anterior distal edge notched ; uropod 3, outer margin of 

 inner ramus with several groups of setules, outer margin of outer ramus 

 setose ; pleon segment 4 raised to a subacute process much smaller than 

 in the male ; pleon segment 6, lateral ridges small. 



