EXPLANATION OF PLATE LXilL 



Fia. 1. Small portion of colony of Mopsea flnbellum, sp. nov. 



Nat. size. 

 Fir/. 2. — Axis of same, x 3. 

 Fig. 3. — Enlargement of polyps, x 12. 

 Fi". 4. — Spicules of MopsMa textiformis, Lamarck. 

 Fig. 5. A.xis of same, with a few patches of coenencliyraa. Nat. 



size. 



