335 



274 



Fig. 137. Hyperiella antarctica Bovallius, male (after Bowman, 1973). 



274 



somite VI of the pereon; the flagellum consists of 9-10 thin segments. 

 The mendibles have a denticulate cutting edge and an accessory plate on 

 the left mandible. The outer lobe of maxillae II is somewhat longer than 

 the inner lobe and apically bears two strong spines. The outer lobes of 

 the maxillipeds have a denticulate inner margin; the fused inner lobes 

 are very short. 



The 2nd segment of pereopods I is almost linear; the 5th segment is 

 flat, highly broadened distally, and its length equal to its maximum width; 

 the elongated-oval 6th segment is longer than the 5th, its anterior margin 

 convex, the posterior margin almost straight and finely denticulate; the 

 claw is strong, slightly curved, and denticulate along the posterior margin, 

 its length 2/3 the 6th segment. Pereopods II are somewhat shorter than 

 pair I; the 5th segment is highly broadened distally, its lower distal angle 

 stretched into a narrow lobe equal to the body of the segment in length, 

 its anterior side is chisel-like and apically bearing four strong setae; 

 the 6th segment is narrower than in pereopods I and longer than the 

 distal process of the 5th segment, its anterior margin slightly convex, 

 the posterior margin straight and finely denticulate; the claw is less than 

 half the length of the 6th segment and denticulate along the posterior 

 margin. The 5th segment of pereopods III and IV is longer than the 4th 

 but equal to it in width, its anterior margin convex and the posterior 

 margin straight, finely denticulate and armed with spiniform setae; the 

 slightly curved 6th segment is much narrower than the 5th and equal 

 in length to the 4th and 5th segments together; the thin claw is half the 



