5i8 



DEPTHS OF THE OCEAN 



tenuispimcs, also found on the plateaus and in the Norwegian 

 depression, the whitish-yellow Bathybiaster vexillifer (see Fig. 

 359, which in the cold area takes the place o^ Psilaster andro7neda, 



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its relative of the plateaus and coasts), and in smaller quanti- 

 ties the semi-transparent Hymenastcr pellucidus (see Fig. 360). 

 Among brittle-stars the big light-coloured Ophiopleura borealis 

 and the smaller gray Opkiocten sericeum (also found along the 

 coasts, though in a slightly different variety) are in greatest 



