EXPLAXATION OF PLATE LXIV. 



Fig. 1. — Mopsen iiustralis, sp. nov. Nat. size. 



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



Fig. 3. — - „ deyaiis, sp. nov. Small portion of a colony. 



Nat. size, 

 Fig- 4- — ,, „ . Enlargement of stem and polyps, x 25. 



