172 



THE DEPTHS OF THE SEA. 



[chap. IV. 



these — for the region in which they are common 

 under very different climatal conditions is within a 

 few miles, and there is no intervening barrier- — but 



Fig. Si.—Ophiomuei/um lymani, Wv\ illu Thomson. Dorsal surface ; natural size. (No. 45. 



they certainly are not abundant. Amphiura abys- 

 sicola, Saks, was in great numbers sticking to the 

 sponges, and Ophiacantha spinulosa was nearly as 

 common as in the cold area. 



