PLATE IX. 
' Fig. 1. Majaudrina clivosa Verrill, reduced one ludf. 
Fig. 2. Mseandrina clivosa Verrill, details slightly magnified. 
Fig. 3. Majandrina clivosa Verrill, septa, magnified. 
Fig. 4. Mseandrina clivosa Verrill, section througb the ridge, magnified. 
Fig. 5. Majandrina clivosa Verrill, polyps expanded. 
Figs. 6, 7. Ma^andrina strigosa Dana, portions magnified, seen in profile and from above. 
Fig. 8. Majandrina strigosa Dana, septa, magnified. 
Fig. 9. Mseandrina strigosa Dana, section through ridge, magnified. 
Figs. 10, 11. Mseandrina labyrinthiformis Oken, portions magnified, seen in profile and from above. 
Fig. 12. Mseandrina labyrinthiformis Oken, section through ridge, magnified. 
Fig. 13. Colpophyllia gyrosa Milne-Edw. and Haime, portion with polyps partly expanded, natural size. 
Fig. 14. Colpophyllia gyrosa Milne-Edw. and Haime, polyp, magnified. 
Fig. 15. Colpophyllia gyrosa 5Iilne-Edw. and Haime, a polyp before division, magnified. 
Fig. 16. Colpophyllia gyrosa Milne-Edw. and Haime, tentacles, magnified. 
