EXPLANATION OF PLATE LXVI. 



Fig. 1. — Polyp of PlumareUa Icevis, sp. nov. 

 Fig. 2. — ,, Mopsea whiteleggei, sp. nov. 



Fig. 3. — Spicules of the same. 

 Fig. 4. — Polyp of PlumareUa versluysi, .sp. nov. 

 F'ig. 5. — „ ,, thetis, sp. nov. 



