12 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.18 



Description of male: Head not as long as first 3 body segments, 

 with a conspicuous rostrum, lower edge of head oblique and convex. 

 Eyes small, upper pair behind front incision of head, lower pair on 

 lower oblique margin of head. 



Antenna 1 more than one half as long as antenna 2 ; articles 1 and 

 2 of peduncle subequal in length; setal tufts typically developed on 

 peduncles of both antennae. 



Antenna 2 about as long as body ( ? broken) ; article 5 of peduncle 

 about three fourths as long as 4. 



Mandible: spine row with 10 spines; article 3 of palp more than 

 three fourths as long as 2. 



Maxilla 1 : outer plate with 1 1 spines ; article 2 of palp nearly as 

 wide as outer plate, armed with 4 spines, 3 cusp teeth and 9 setae. 



Maxilliped: inner plate reaching to end of palp article 1, apex with 

 2 chisel teeth ; outer plate reaching to end of palp article 2, inner edge 

 with 9 chisel teeth, rounded apex with 5 spines, the outer 2 plumose. 



Coxae 1 to 3 : lower posterior angle slit. 



Gnathopod 1 : article 6 about two thirds as long as 5, article 7 

 nearly two thirds as long as 6 ; posterior edge of article 6 slightly con- 

 cave and with strongly developed setal spines. 



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

 long as 6. 



Peraeopod 1 : anterodistal end of article 4 produced downward, 

 anterior and posterior margins strongly setose; article 7 about as long 

 as articles 5 and 6 combined. 



Peraeopod 2 : similar to 1 but with generic differences. 



Peraeopod 3 : posterior edge of article 5 with 3 sets of spines, poste- 

 rior edge of article 6 with 2 spines. 



Peraeopod 4: posterior edge of article 5 with 3 sets of spines, pos- 

 terior edge of article 6 with 1 spine. 



Peraeopod 5: lower edge of posterior lobe of article 2 rounded, 

 above this oblique, reaching down slightly beyond end of article 3; 

 article 4 longer than 3, its posterior edge with a narrow setose lobe- 

 article 6 slightly longer than 5, the last 3 articles rather narrow. 



Uropod 1 : reaching to end of uropod 2 ; rami subequal to each other, 

 about as long as peduncle ; inner edge of both rami spinulate. 



Uropod 2: outer ramus shorter and narrower than inner, inner 

 ramus subequal to peduncle in length ; both margins of both rami spinu- 

 late. 



