Plate 5. 



Fig. 1. Specimen of Poctttopora bulbosa Ehrenberg, as attached to a log in 



Cocos-Keeling Islands. From a photograph kindly supplied by Dr. 



F. Wood Jones. 



2. rocillopora elcgans Dana, natural size. A specimen from the outer 



barrier, Cocos-Keeling Islands. The rough water facies of the species. 



244 



