302 A HISTORY OF RECENT CRUSTACEA 
Edwards, and Nerocila serra, Schiddte and Meinert, 
in general appearance somewhat approach the next family, 
the Serolide, but this is still more the case with Nerocia 
Lovéni, Bovallius, 1887 (see Plate XV.), from the coast of 
Java, in which the side-plates of the perzeon-segments ‘ are 
very long, extremely produced, flattened in the form of 
sabres or flat horns, very sharp;’ those of the seventh 
segment reaching nearly to the end of the peduncles of 
the uropods. The New England species, Nerocila munda, 
Harger, is not mentioned by Schiédte and Meinert. 
Livonéca, Leach, 1818, contains twelve species. The 
head, which is large in the young, is much smaller in the 
adult male, and generally of moderate size in the adult 
female. The eyes suffer less diminution with advancing 
age than in the preceding genus, with which in regard to 
the mouth-organs it is in near agreement. Whereas in 
the arrangement by Schiddte and Meinert these two genera 
are widely separated, Hansen regards them as closely 
connected, and both very near to Rocinela, a genus of the 
Aigide. Livoneca Redmanni, Leach, is a variable species, 
widely distributed on the east coast of North and South 
America; Ivvoneca ovalis (Say) is perhaps a synonym of 
it. As in other species of this genus the adults are 
usually twisted to one side. 
Anilocra, Leach, 1818, contains sixteen species, one of 
which excels in size all others of the family, this being 
Anilocra gigantea (Herklots), for which Herklots instituted 
the genus Epichthys, but without assigning any distin- 
guishing character of any importance except the gigantic 
size. The length of three inches and a half, though 
striking even in this family of large Isopods, is not a 
character of generic value. It is remarked, however, that 
the young of this species is very different from the young 
of neighbouring species, even of those most nearly allied 
in the adult forms. Anilocra asilus (Linn.), recorded by 
the Rev. A. M. Norman from Herm, is interesting, not 
merely as being hitherto the only British representative of 
the family, but as being the ancient Pediculus marinus of 
Rondelet and Gesner. 
