^-^^ 



27. A large brain coral, Lobopltyllia, originalh' dome-shaped, \\ hicli has been killed at 

 its center by exposure. (Green Island, Great Barrier Reef. Allen Keast) 



28. Globose masses of reef coral with relativeh 

 large twelve-ten tacled poKps appear green from 

 the planflike cells that live in their tissues. 

 (Bimini. Fritz Goro: Life Magazine) 



