170 



THE DEPTHS OF THE SEA. 



[chap. IV. 



Although 



many of the echinoderms of the cold 



area are common to the warm, the general fades 



of the echinoderm fauna ,is different, and there are 



a numher of additional and very striking forms. 



Cldaris papillata, Leske, is abundant at moderate 



Fio. il.—AXhptyra tailina, Ehbenbebo. 



depths. On our second visit to the HoUenia ground 

 we dredged one small specimen of the handsome 

 urchin already described, Porocidaris purpurata. 

 A fine brilliantly-coloured urchin of the Echinm 



