CHARACTERISTIC DEEP-SEA TYPES. — CRUSTACEA. 49 
region only a single species, Bathynomus giganteus (Fig. 252), 
has been described, but this is by far the largest isopod known, 
and is more than eleven inches long! The eyes of this giant 
are placed on the lower side of the head, and consist, according 
to Milne-Edwards, of no Jess than four thousand facets. 
The amphipods have not been studied, but the collection from 
the Atlantic coast of the United States contains several inter- 
esting species; among them the 
great angular and spiny Epime- 
ria loricata (Fig. 253), first de- 
scribed from specimens taken by 
the Norwegian expedition in the 
North Atlantic, and a single speci- 
men of the very peculiar Neohela 
pasma. 
The pyenogonids from the West 
Indian region have not yet been 
described, but those from the At- 
lantic coast of the United States, which have been studied by 
Prof. E. B. Wilson, are especially interesting. The most striking 
Fig. 253. — Epimeria loricata. 1. 
(S. I. Smith.) 
Fig. 254. — Colossendeis colossea. $. (E, B. Wilson.) 
feature of the species is their great size, most of them being gi- 
gantie as compared with shallow-water species. There were ten 
