CHAPTER IX. 



THE DEEP-SEA FAUNA. 



The Protozoa of the Deep-sea. Batln/nus. 'Coccoliths,' and 'Cocco- 

 spheres.' The Foraminifera of the Warm and Cold Areas. Deep- 

 sea Sponges. The Hexactmellidaj. Rossella. Hyalonema. 

 Deep-sea Corals. The Stalked Crinoids. Pentacrimis, Rhizo- 

 crinus. Eatliycrinus. 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. 



