355 



subapically. Pereopods III and IV are somewhat longer and stronger than 

 pereopods V and VI; pereopods VII are distinctly shorter. 



Type species: Laxohyperia vespuliformis Vinogradov and Volkov, 

 sp. n. 



290 The genus is undoubtedly very close to the genus Hyperoche, but 

 readily distinguished from it by smaller size, the unique structure of the 

 5th and 6th segments of pereopods I and II, and very poorly developed 

 epimerons. 



1. Laxohyperia vespuliformis Vinogradov and Volkov, sp. n. (Fig. 148)* 

 The type specimen is preserved in the Institute of Oceanography of 



the Academy of Sciences, USSR. 



Length of females 3.5-4 mm. Male not known. 



The pereon is broadened in the anterior part but tapers in the poste- 



291 rior part; the pleon is as narrow and low as the last somites of the pereon. 

 Antennae I have a narrowly conical flagellum exceeding the peduncle in 

 length. Antennae II are half the length of antennae I; the flagellum has a 

 linear distal segment. The mandibles are small, with a short denticulate 

 cutting edge, and an accessory plate; the palp is three-segmented and 

 shorter than the mandibular body. Maxillae I have a petaloid, slightly 

 distally broadened palp and a strong outer lobe armed with long spines 

 and setae. The outer lobe of maxillae 11 bears one strong apical seta. The 

 outer lobes of the maxillipeds are narrowly oval and armed with a few 

 strong setae in the distal part; the inner lobes extend to 2/3 the length 

 of the outer and are pubescent with numerous short setae in the distal 

 part. 



Pereopods I and II are short and identical in structure; the 2nd seg- 

 ment is slightly broadend distally and shorter than all the other segments 

 together; the 4th segment is trapezoid, expanding distally in such a way 

 that its maximum width slightly exceeds its length; the 5th segment has a 

 broad, almost rectangular, and nontapering leaflike lobe that exceeds half 

 the length of the 6th segment in pereopods I, but does not quite reach 

 here in pereopods II; the 6th segment has an almost straight anterior 

 margin, a roundedly convex posterior margin, acute apex, and is flat and 

 leaf like in the posterior part; the anterior and posterior margins of the 

 6th segment and distal lobes of the 5th are armed with numerous tender 

 and short setae as well as rows of somewhat longer submarginal setae; 

 the claw is long, straight, thin, and attached subapically. Pereopods III 

 and IV are simple; the 2nd segment is almost linear; all the segments 

 bear a few marginal setae along the posterior margin; the claw is long, 

 thin, and almost straight. Pereopods V and VI are somewhat shorter and 



" According to the first publicauon uf tie Russian text, this and other new species 

 should be considered as described iri 1 982 



