273 



Fig. 111. Vibilia caeca Bulycheva. 



posterior distal angles of both the 2nd and 3rd segments bear spines; the 

 6th segment is 1.5 times longer than wide, its anterior margin uniformly 

 convex, and the posterior margin with complex denticulation (groups 

 of minute denticles are divided by deeper incisions); the claw is thick, 

 almost straight, and somewhat longer than half the 6th segment. The 2nd 

 segment of pereopods II is slightly longer than the rest of the leg, its 

 anterior margin convex, and the posterior margin slightly S-shaped; the 

 3rd-4th segments bear spines along the anterior margin; the 5th segment 

 is the same length along its anterior" margin as the 6th segment, its 

 process extends to the base of the claw, and its inner margin as well as 

 the anterior margin of the 6th segment with complex denticulation (as 

 in pair I); the claw is short, equal to half the length of the 6th segment. 

 The 2nd segment of pereopods III has an S-shaped anterior margin while 

 its posterior margin is convex; all the segments are smooth and their 

 length ratio 3:1:2:1.5:2.3:1. Pereopods IV are slightly longer and thinner 

 and the length ratio of the segments 3.5:1:2:1.5:2.4:1.3; the distal part 



• Changed from Russian text by authors — ^Eds. 



