480 



denticulate in the distal part but armed throughout its length with sparse 

 389 marginal and submarginal spines; the margins of the subchela are smooth; 

 the claw is short. The 2nd segment of pereopods V is broad but not oval 

 and its margins slightly bulged; the 4th segment is the broadest of the 

 distal segments, the 5th shorter, and the 6th equal in length to the 4th; the 

 5th and 6th segments have a smooth anterior margin. The 2nd segment 

 of pereopods VI is not longer than in pereopods V but slightly broader in 

 the proximal part; the 4th segment is broad, especially in the distal part; 

 the 5th and 6th segments are denticulate all along the anterior margin, 

 the 4th only in the distal part; the claw is very small. The 2nd segment of 

 pereopods VII is distally narrowed, its anterior margin straight, and the 

 posterior margin bulged; the distal segments together are half the length 

 of the 2nd segment. 



The last urosomite is much wider than long. Urosomites II and III 

 are fused and lateral furrows occur at the place of fusion. In urosomite III 

 the lateral margins are bulged. The basipodite of uropods I is straight and 

 twice as long as the rami. The basipodite of uropods II is denticulate in 

 the distal part of the posterior margin; the endopodite is longer than 

 the exopodite but slightly shorter than the basipodite. The endopodite of 

 uropods III is twice as long as the exopodite. The telson is approximately 

 2/3 the length of the last urosomite, triangular, with a rounded tip, and 

 slightly longer than its width at the base. 



Distribution: Known from the Atlantic (tropical zone), Indian (region 

 of Zanzibar), and Pacific (eastern part north of 20° S, north of New 

 Zealand) oceans, and the Mediterranean Sea. It inhabits the upper 

 warmed water layers. 



6. Lycaea lilia Volkov, sp. n. (Fig. 210) 



The type specimen is preserved in the Pacific Ocean Scientific 

 Research Institute of Fisheries and Oceanography (TINRO). 



Length of sexually mature specimens up to 9 mm. 



The head is large and anteriorly rounded; in females its length is 

 equal to the length of the first four perecn somites, in males somewhat 

 shorter; the height is 1.5 times the length. 



The pereon is almost 1.5 times longer than the pleon. 



The 2nd segment of pereopods I is very short, broadened, its width 

 2/3 its length; the 4th segment is twice wider than long; the 5th segment 

 is broader than the 4th and the subchela well developed; the posterior 

 distal angle of the 5th segment is straight, without an extended tip, and 

 the margins are not denticulate; the 6th segment has a smooth posterior 

 margin but in the distal part is armed with very fine submarginal setae; 

 the claw is very short. The 2nd segment of pereopods II is 1.5 times 

 longer than in pereopods I; the 4th segment is equal in maximum width 

 to that of the 5th; the 5th segment is narrower than in pereopods I and 



