398 
GAMMARIDiE. 
similar in this respect, monodactyle. Natatory fins long, 
divided, and beautifully ciliated. Caudal processes three 
pairs, long, with aciculate branches. Two rather long 
conical spinous processes [the two divisions of the middle 
tail-piece] terminate the tail ; and above these are two 
much smaller papillse. 
“ Hab. Amongst confervse in pools left by the tide ; 
not rare near Berwick.” 
Dr. Johnston questions whether it belongs to the 
same genus as Pherusa fucicola , Leach, with which at 
first he thought it was identical. 
66 In the figure of Ph . fucicola , in the Supplement 
to the Encyclopaedia Britannica, the second joint of the 
superior antennae is represented as elongated, the first 
pair of feet or arms filiform, without any hand, and the 
hand of the second pair oval, with a very small claw. 
There is also a considerable difference about the tail, the 
Pherusa having no terminal conical processes.” 
Dr. Walker, of Birkenhead, informs us that he has 
taken specimens, which he considers to belong to this 
species, occasionally off the mouth of the Mersey, and 
along the coast to Dee. 
