DEEP-SEA SEA-URCHINS. 



Fig, 88. — Lovenia gj-egalis, from the Bay of Bengal, 475 fathoms. 

 The hair-like and bristle-like spines with which it is covered have been 

 removed. 



Fig. 89. — Homolampas glatica, from the Bay of Bengal, 1644 fathoms. 

 Most of the spines have been removed. 



[To face page 288. 



