EXPLANATION OF PLATE LXIV. 



Fig. 1. — Mopsea australis, sp. nov, Nat. size. 



Fig. 2. — ,, ,, . Enlarged tip of a dried branch, x 15. 



Fig. 3. — ,, eleyans, sp. nov. Small portion of a colony. 



Nat. size, 

 Fig. 4. — ,, ,, . Enlargement of stena and polyps, x 25. 



