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 less 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 pycnogonids 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. 

 (S. I. Smith.) 



Fig. 254. Colossendeis colossea. $. (E. B. Wilson.) 



feature of the species is their great size, most of them being gi- 

 gantic as compared with shallow-water species. There were ten 



