PLATE VI. 



Figure 1. Stylina tertiaria^ Duncan. A part of the corallunij natural size. 



2. Calices, magnified. 



3. Favia Maliriensis, Duncan. Some calices, magnified. 



4. Calices, magnified^ showing large septo-costse. 



5. Favia PEDUNCULATAj Duncan. Part of the surface of the coraUum. 



6. CaliceSj slightly magnified. 



7. Cyathoseris orientalis, Duncan. The side view. 



8. Septaj magnified, showing synapticulae. 



9. Junctions of septa on a colline. 



10. Costal striae of under surface, magnified. 



11. DiPLORiA FLExuosissiMA, DAch. A part of the corallum. 



12. Two series, slightly magnified. 



13. AsTRoccENiA NUMisMA, Defrance, sp. Upper part of the coral, natural size. 



14. Side view. 



15. Calices, magnified. 



