PHOXUS HOLBOLLI. 145 



tected by the deep lateral walls of the segments to which 

 they are attached. The caudal appendages terminate 

 subequally, the posterior pair being a little the longest ; 

 the two preceding have the styliform rami equal in 

 length, and free from hairs ; the last pair have the 

 peduncle short, and the rami unequal, the outer branch 

 being one-third longer than the inner. The middle tail- 

 piece is double, each division being long and tapering, 

 and the apex tipped with a few small hairs. 



The animal, as far as we have been able to judge from 

 recently-dead specimens, is transparent and colourless ; 

 nor have we been able to detect any eye. The surface 

 of the skin is sparsely covered with small hairs, some of 

 which are simple, while others have a club-shaped apex. 

 Judging only from Kroyer's description, we have but 

 little doubt that this species is identical with that which 

 he named after M. Holboll. 



We first found it as British by dredging it in Ply- 

 mouth Sound ; it has since been sent to us from Banff 

 by that indefatigable lover of nature, Mr. Edward. 



