THE VOYAGE OF H.M.S. CHALLENGER. 



animals, living in the vicinity of the coasts, at a depth of 6 to 10 or 20 fathoms; but 

 now the number living at great depths has so increased that it is nearly equal to that 

 of the shallow-water forms. 



If we compare the two groups, it is obvious that the great majority of the higher 

 forms of the famiUes Pteeoeidid/e, Pennatulid^, Virgtjlarid^., and Eenillid^ live in 

 shallow water. The only sj)ecies going deeper than 100 fathoms, are — 



Of the lower groups of the Pennatulida, only the Veretillidse seem to live in shallow 

 water ( V. cynomorium, var. astyla was found by Studer, at the Cape de Verde Islands, 

 in 115 fathoms). All the others, are, with very few exceptions, deep-sea forms, as shown 

 by the following list : — 



FuNICULINIDiE. 



Funiculina quadrangtdaris, Blainv.. 

 Hcdiptevis cliristii, Kor. and Dan., 



Fathoms. 



20-350 

 200 



i 



Staclujptilum madeari, Koll., 



Stachyptilid^. 



129 



ANTHOPTILIDiE. 



