318 
HISTORY OF BRITISH CRUSTACEA. 
The head is shaped like a small buckler, and furnished with 
frontal plates. There is a series of one or more pairs of 
lamellar appendages, which extend along the back of the 
thorax. The egg-bearing tubes straight, external. 
Gen. 176. DINEMOURA* Latr. 
The plate-like appendages covering the thorax are two 
only. The first three pairs of feet are setiferous ; the pos- 
terior are foliaceous and membranous. 
The first species here quoted, and figured, with all the 
others in Dr. Baird’s excellent work, when viewed from 
above, resembles somewhat an undressed doll with the head 
and neck and part of the legs removed. 
Dinemoura alata, M. Edw. sp. — Oblong; about half 
an inch long. Dorsal plates of a chestnut-colour, and with 
pale, scattered dots. 
Hab. Berwick Bay : on the Beaumaris shark. 
The late Dr. Johnston, of Berwick, first described this as 
British. He remarks (Loudon’s Mag. Nat. Hist. viii. 203) 
that it appears to be parasitical on several species of fish; 
and that the creature generally attaches itself to the sides 
of the branchial covers, and adheres tenaciously, by thrust- 
# Als, two, vy][xa, thread, and ovpa, tail. 
