PLATE VIII. 



Fig. 1. Colpophyllia gjTosa Milne-Ed w. and Haime, horizontal section, natural size. 



Fig. 2. Colpophyllia gyrosa Milne-Edw. and Haime, part of a waterwom specimen showing the double 



wall separating the sinuses. 

 Figs. 3-5. Colpophyllia gyrosa Milne-Edw. and Haime, vertical sections. 



