3 14: A HISTORY OF RECENT CRUSTACEA 
Acanthias vulgaris, which had been reduced to nothing but 
skin and bones by these parasites. They hunt, he says, 
in shoals, driving away the congers and other fish, but are 
themselves devoured by the bream. (‘ Proceedings of the 
Zoological Society, London,’ for 1884, p. 44). In this and 
the preceding genus there is little difference between the 
sexes, whereas in the next that difference is sometimes, 
though not always, considerable, 
Kurydice contains nine species, but they are not all well 
known. The actively swimming and viciously biting little 
Hurydice pulchra, Leach, which should perhaps rather be 
called Hurydice achatus (Slabber), is extremely common on 
many of the sandy shores of Great Britain. There seems 
a sort of conspiracy to deprive Slabber of the credit of his 
observations, which for his period were by no means to be 
despised. ‘ihe specific name he chose no doubt refers to 
the handsome markings, which, however, are rather stellate 
or dendritic than agate-like, and which in this species are 
retained even when the animal has been preserved for 
many years in spirit. The eyes have a surface facetting. 
Eurydice truncata, Norman, from St. Magnus Bay, Shet- 
land, is described as having the ‘ superior antenne sud- 
denly bent in a remarkable way at a right angle at the 
junction of first and second joints of the peduncle.’ 
Bathynémus has but a single species, but, in contrast 
with the small stature prevailing in the species of Eurydice, 
the West Indian Bathynomus giganteus, A. Miime-Edwards, 
is by far the largest of all known Isopods. The eyes are 
said to be placed wholly on the underside of the head, and 
each to contain nearly 4,000 squared facets. There is a 
tendency in other Cirolanide for the eyes to adopt some- 
thing of a ventral position, so that it is not on this account 
necessary to place Bathynomus in a separate family. The 
development of accessory branchiz has been no doubt 
necessitated by the animal’s great size and its abyssal habi- 
tat, to which the specific and generic names respectively 
refer. Professor Milne-Edwards says that its pleopods 
form ‘a sort of opercular system, beneath which are found 
the true organs of respiration, or branchie. These, re- 
