CHAPTER IX. 
THE DEEP-SEA FAUNA. 
The Protozoa of the Deep-sea.—Bathybius.—‘ Coccoliths,’ and ‘ Cocco- 
spheres.’—The Foraminifera of the Warm and Cold Areas.—Deep- 
sea Sponges. —The Hexactinellidee. — Rossella,.— Hyalonema.— 
Deep-sea Corals.—The Stalked Crinoids.—Pentacrinus.—Rhizo- 
crinus. — Bathycrinus.—The Star-fishes of the Deep-sea.—The 
general Distribution and Relations of Deep-sea Urchins.—The 
Crustacea, the Mollusca, and the Fishes of the ‘ Porcupine’ Expe- 
ditions. 
THe time has not yet arrived for giving anything 
like a detailed account of the deep-sea fauna; even 
if it were possible to do so in a popular sketch of 
the general results of a wide investigation. I must 
therefore confine myself at present to a brief outline 
of the distribution of the forms of animal life which 
were met with in the belt partially examined during 
the ‘Porcupine’ dredgings, a belt which carries the 
British zoological area about a hundred miles further 
out to seaward along the northern and western coasts 
of the British Isles, and into depths extending from 
200 fathoms, the previous limit of accurate know- 
ledge, to 800 and 1,000 fathoms, and in one or two 
instances to the extreme depth of upwards of 2,000 
fathoms. 
