6 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



Peraeopod 2 similar to 1 but more setose. 



Peraeopod 3 : article 5 with 2 sets of spines on posterior edge, article 

 6 with 3 spines on posterior edge. 



Peraeopod 4 similar to 3 but with 2 spines on posterior edge of 

 article 6. 



Peraeopod 5 : article 2 rather narrow, lower posterior edge straight, 

 oblique, produced downward to joint between articles 4 and 5 ; article 4 

 longer than 3, posterior edge with a narrow, setose lobe; article 6 longer 

 than 5, article 7 as long as 5. 



Uropod 1 reaching to end of uropod 2, rami about as long as peduncle, 

 outer upper edge of peduncle not spinose, inner edge of inner ramus with 

 3 spines, outer edge with 1 spine ; outer edge of outer ramus with 3 small 

 spines on outer edge. 



Uropod 2 : outer ramus shorter than inner, inner as long as peduncle, 

 inner edge of inner and both edges of outer ramus spinose, outer edge of 

 inner ramus with 1 spine, outer ramus with a long, subapical spine. 



Uropod 3 : rami broadly lanceolate, inner longer than outer, with 

 inner edge serrate, outer ramus setose on both margins. 



Telson slender, apices laterally notched, each with 2-3 spinules, dorsal 

 surface of each lobe with a line of setae. 



Pleon segment 3 : posterior edge of epimera slightly convex, lower 

 posterior corner produced into a short, blunt tooth. 



Pleon segment 4 raised into a low, massive, straight-topped boss, 

 nearly cristate at apex. 



Pleon segment 6 with well developed lateral crests. 



Male. — Unknown. 



Types. — Holotype, AHF No. 3916, female, 5 mm, with 6 paratypes. 



Type locality. — Station A25-39, Cubagua Island, Venezuela, shore, 

 April 14, 1939. 



Material examined. — The types. 



Remarks. — This species is very closely related to Ampelisca panamen- 

 sis Barnard (1954), differing from that species by the serrate inner mar- 



