NO. 1 BARNARD : AMPHIPODA OF THE FAMILY AMPELISCIDAE 47 



edge strongly incised, lower front edge oblique. Upper pair of eyes be- 

 hind upper margin of first antennal article, lower pair below lateral 

 angle of head. 



Antenna 1 reaching to end of peduncle of antenna 2; first and sec- 

 ond article of peduncle subequal in length, armed on lower margin 

 with setal tufts; article 3 less than half as long as article 2, unarmed. 



Antenna 2 longer than body; article 5 of peduncle about three 

 fourths as long as article 4, both lined on superior margins with minute 

 setal tufts. 



Mandible: spine row with 10 spines; article 3 of palp as long as 

 second. 



Maxilla 1: apex of outer plate with 10 spines; palp article 2 nar- 

 rower than outer plate, apex armed with 4 spines, 3 cusp teeth, and 10 

 to 12 setae. 



Maxilliped : inner plates reaching slightly beyond end of palp article 

 1, apex armed with 1 chisel tooth; outer plate reaching to end of palp 

 article 2, inner edge lined with 8 chisel teeth, rounded apex with 4 

 setal spines, the outer 2 plumose. 



Coxae 1 and 2 with strong slit, 3 without. 



Gnathopod 1 stout; article 6 as long as article 5, posterior proximal 

 edge produced into a massive, rounded lobe, the palmar portion armed 

 with heavy spines and setae; distal end of article 6 narrow; article 7 

 about two thirds as long as article 6, strong, arched, inner edge with 

 several simple setae. 



Gnathopod 2 slender; article 6 more than half as long as article 5, 

 posterior edge nearly straight ; article 7 half as long as article 6, slightly 

 curved, with a single simple seta on inner margin. 



Peraeopod 1 : posterior edge of article 4 lined with setae nearly its 

 entire length, anterodistal angle slightly produced; article 7 about half 

 again 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 2 or 3 sets of spines, 

 posterior edge of article 6 with 1 to 3 spines. 



Peraeopod 4 similar to 3 but with generic differences. 



Peraeopod 5 : posterior lobe of article 2 evenly rounded, extending 

 downward to end of article 3 ; articles 3 and 4 subequal in length, ar- 

 ticle 4 with a large, posterior setose lobe ; distal anterior edge of article 

 5 notched; article 6 rather narrow; article 7 slender, attenuated, about 

 as long as article 5. 



Uropod 1 short, reaching only slightly beyond end of peduncle of 

 uropod 2; rami equal to peduncle in length; both edges of inner ramus 

 spinulate, outer ramus unarmed. 



