CHAP, vi.] DEEP-SEA DREDGING. 275 



Species. 



~ , / Hydrozoa 2 



Ccelenterata .... i A J ,. 



( Anthozoa 20 



22 



/Crinoidea 2 



) Asteridea, including Opliiuridea . 21 

 Lchmodermata . . . < ^ , . ^ 



I Jichmoidea 5 



^ Ilolotliuridea 8 



3G 



, r f Gephyrea 6 



Vermes AVI 



( Annelida 51 



57 



f Polyzoa 35 



I Tuuicata 4 



Mullusca \ Brachiopoda 4 



Conchlfera 37 



[ Ceplialophora 53 



133 



( Arachnida 1 



Arthropoda ...<-, nrter 



( Crustacea 105 



106 



Of these 24 protozoa, 3 ecliinoderms, and 13 mol- 

 lusca are from a depth of 450 fathoms. Professor 

 Sars adds : " We may say, according to our present 

 information, that the true deep-water belt commences 

 at about 100 fathoms. The greater number of deep- 

 sea species begin to appear then, though sparingly, 

 and they increase in number of individuals as we 

 descend to 300 fathoms, or in some cases to 450, 

 jjvhen investigations have been carried so far. To 

 * x what depth this belt extends, or whether there is 

 another below it of a different character, is not yet 

 known." 1 



In the year 1864, M. Earboza du Bocage, Director 



1 Fortsatte Bemserkninger over det dy-riske Livs Udbredning i 

 Havets Dybder, af M. Sars. (Vidensk.-Selsk. Forhandlinger for 



18G8.) 



