8o 



DISCOVERY REPORTS 



Description. The specimen from St. 291 consists of three fragments all presumably 

 belonging to the same animal: joined together they give a length of between 50 mm. 

 and 60 mm. with a breadth of about 3 mm. The anterior border of the prostomium is, 

 with the proboscis everted, slightly concave. There are two very large eyes (Fig. 24, a 

 and h) with their axes pointing laterally. There is a small conical unpaired tentacle and 

 two pairs of lateral tentacles. There are four pairs of tentacular cirri, the first larger 



■"^mm. 



^0 



T4-mm. 



^0 



a 



■5mm 



Fig. 24. Vanadis longissima. 

 a. Dorsal view of head. b. Ventral view of head. 



Middle foot. 



than the other three and joined across the ventral surface by a membrane as in V.for- 

 mosa : the fourth pair is very small and rather flattened. The first two pairs of parapodia 

 are modified into sperm vesicles. 



The feet (Fig. 24, c) are fully developed by about the 7th chaetiger. They consist of 

 a foliaceous dorsal cirrus, a much narrower and more elongated ventral cirrus, and a 

 long conical chaetigerous lobe with a projecting aciculum and a single small cirriform 

 process. The bristles are all of the long compound type. 



