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. 
L 
