420 SPHEROMIDA. 
entire length. The outer plate of the lateral appendages 
of the tail is considerably smaller than the inner, which 
is broadly ovate. When alive, the animal is of a reddish 
colour, being covered with numerous red dots, or greyish 
buff with black specks; the articuli of the flagellum of 
the antennz are tipped with red, and the anterior seg- 
ments of the body have a red transverse line beyond the 
middle of each. 
It is stated by Dr. Leach that this species is very com- 
mon on the south-west coast of England, where it was 
first taken by Montagu. We have taken it at Firestone 
Bay, near Plymouth. It has also been taken at Cumbrae, 
in the Firth of Clyde, by the Rev. A. Norman; and at 
Bangor, in Ireland, in September, by the late Mr. W. 
Thompson ; and probably occurs all round our coast. 
