286 



The somites of the pleon are massive. The posterior lateral angles 

 of the last urosomite project slightly. The basipodite of uropods I is 

 almost twice longer than the rami; the inner margin of the endopodite 

 has four-five large denticles in the distal part and its outer margin is 

 denticulate; the exopodite has a series of strong denticles on the outer 

 margin, while the inner margin is finely denticulate almost throughout 

 its length. Uropods II are much shorter than uropods I; the basipodite 

 235 is slightly longer than the rami; the endopodite has three large denti- 

 cles on the inner margin and is finely denticulate on the outer side; 

 the exopodite has several large denticles on the inner margin which are 

 replaced proximally by very fine denticulation, while the outer margin is 

 weakly denticulate. In uropods III the rami are unequal in length — the 

 endopodite is longer and denticulate on both sides while the exopodite 

 is denticulate only on the inner side. The telson is small and triangular. 



Notes: Judging from the description, the species V. bovallii is close 

 to V. pyripes (projecting angles of the last urosomite, short basipodite 

 of uropods III, very little difference in length of pereopods III-VI, and 

 relatively long pereopods VII). In addition to the absence of a chela on 

 pereopods II (which distinguishes this species among all the Vibilia), 

 V. bovallii differs from V. pyripes in a small triangular telson and dis- 

 tinctly expressed sexual dimorphism in the structure of uropods III (in 

 V. pyripes the rami of uropods III are equal in length in both sexes). 



Distribution: V. bovallii was described from the Bay of Biscay and 

 there are no references to further finds, which casts doubt upon the 

 validity of the species since the Bay of Biscay has been investigated 

 several times. 



Absent in our collections. 



17. Vibilia ajfinis Bate, 1862 (Fig. 117) 



Bate, 1862: 302; Bovallius, 1887b: 50. 



Body length about 7 mm. 



The head has a poorly developed rostrum, is longer than the first 

 two somites of the pereon, and its height is equal to its length. The eyes 

 are small. Antennae I are very long, considerably longer than the head 

 and first two somites of the pereon; the base is about half the length of 



236 Fig. 117. Wii7/aaj9imj Bate (after Bate, 1862). 



