332 



the posterior margin of the 3rd-6th segments is armed with spinules and 

 in the 6th segment is additionally finely denticulate. Pereopods V-VII 

 have only solitary setae. The posterior margin of epimeron III is slightly 

 convex. Uropods I-III are thin and long and their rami narrowly lance- 

 olate, especially in uropods I. The telson is less in length than its width 

 at the base. 



Notes: H. leptura is close to H. macrocephala but distinguished from 

 it by smaller size, different shape of coxal plate IV, structure of the max- 

 illipeds and epimeron III, and much narrower basipodite of uropods III. 



Distribution: Only one specimen is known and was recovered from 

 the Gulf of California. 



7. Hyperia bowmani Vinogradov, 1976 (Fig. 136) 



Vinogradov, 1976: 134. 



Length of the sexually mature female 14.5 mm. 



The length of the head is slightly less than its height and equal in 

 length to somites I-III of the pereon. The cone of the antennal gland has 

 a round apex. The posterior margin of epimeron III is slightly convex 

 and the apex slightly acute. 



The outer Ipbes of the maxillipeds are narrow, the inner margin 

 concave and armed with short setae along its entire length, and the inner 

 lobes armed with two short apical spinules. The coxal plates are flat. The 

 2nd segment of pereopods I and II is comparatively narrow, with short 

 setae in the proximal part of the convex anterior margin. The distally 

 broadened 5th segment of pereopods I is armed with a few spines along 

 the posterior and straight distal margins; the oval 6th segment bears many 

 long setae on the anterior margin and row of four strong submarginal 

 spines along the finely denticulate posterior margin. The 5th segment of 

 pereopods II has a long and narrow distal process extending to 3/4 the 

 length of the 6th segment; the narrowly oval 6th segment bears setae on 

 the anterior margin and three-four submarginal spines along the posterior 

 margin. Pereopods III-IV are well developed; the 4th segment is shorter 

 than the 5th and 6th segments which are almost equal in length; both 

 distal segments bear a long row of submarginal setae; the claw is thin, 

 almost straight, and relatively longer than in other species of Hyperia. 

 In pereopods V-VII the claws are thin, long, and almost straight. The 

 posterior margin of epimeron III is slightly convex and the apex slightly 

 acute. The uropods are much broader than in H. leptura. The telson is 

 slightly longer than its width at the base. 



Notes: H. bowmani is very close to H. leptura but is distinguished 

 from it by the round lower posterior angle of epimeron II, details of 

 ornamentation of the maxillipeds, and much shorter distal (5th and 6th) 

 segments of pereopods I and II. 



