250 



apex while the lateral lobes have a row of seven-eight spinules on the 

 surface and three-four spinules in the distal part of the outer margin. 



In pereopods I the 2nd segment is broadened in the middle; the 5th 

 segment is distinctly longer than wide and bears several setae; the 6th 

 segment is twice longer than wide and its posterior margin straight and 

 finely denticulate except in the proximal part; the claw is longer than 

 half the 6th segment and posteriorly denticulate. In pereopods II the 

 2nd segment is elongated, its posterior margin convex and the anterior 

 margin straight; the lobe of the 4th segment has several spiniform setae 

 at the apex; the acute process of the 5th segment is denticulate and 

 extends to the middle of the 6th segment; the 6th segment is constricted 

 distally, longer than its maximum width, and the distal 3/4 of its posterior 

 margin finely denticulate; the claw is strong, longer than half the 6th 

 segment, with several denticles on the posterior surface. Pereopods III-IV 

 are identical in structure but pair IV slightly longer; the 4th segment is 

 broadened distally, twice longer than its maximum width, and has a 

 convex anterior margin; the 5th segment is linear and its length is 1.5-2 

 times its width; the 6th segment is about five times longer than broad; the 

 claw is smooth and longer than half the preceding segment. In structure of 

 pereopods III-IV, V. stebbingi is similar to V. viatrix but distinguished by 

 lesser developed musculature of the legs, much elongated segments, and 

 shorter claws. Pereopods V-VI are long and thin. The length of the 2nd 

 segment of pereopods V constitutes 1/5 that of the entire leg, is twice its 

 208 width, the anterior margin distally bearing five small spinules; the 4th-6th 

 segments are narrow and the ratio of their lengths 3 : 2 : 4; the claw is 1/4 

 the length of the 6th segment and its posterior margin, like that of the 6th 

 segment, is finely serrated. The 2nd segment of pereopods VI is the same 

 width as in pereopods V but its length three times its width, constituting 

 1/4 the length of the leg; the distal part of the anterior margin has four 

 spinules; the proportions of the 4th-6th segments are the same as in 

 pereopods V; not only the posterior margin of the 6th segment but most 

 of the posterior margin of the 5th segment also is denticulate; the claw 

 is slightly longer than 1/4 the length of the 6th segment. The structure of 

 pereopods VII is characteristic for the species: the 2nd segment is almost 

 half the length of the leg and relatively narrower (length twice width); 

 the wing of the posterior margin is cuneate and stretches downward 

 to the middle of the 4th segment or even farther; the anterior margin 

 is straight or slightly concave, distally acute and stretched downward, 

 with an apical spinule; the 4th-7th segments are cylindrical and each 

 successive one narrower than the preceding segment, with the 5th the 

 longest; the last segment is finger-shaped. 



The urosome is identical in females and males. The posterior lateral 

 angles of the last urosomite do not project backward. The basipodites of 



