XV. Description of the Plates. 



PLATE I. 



Figure 1. Caryophyllia compressa, Duncan. A side view, natural size. 



3. The calice of the coral, one system of its septa and pali, magnified. 



3. The base of the same coral, natural size. 



4. The costse near the calice, magnified. 



5. A side view of Caeyophyllia Indica, Duncan, natural size. 



6. A part of the calice, magnified, showing two systems of four cycles and pali. 



7. The costse, magnified. 



8. Caryophyllia Fbddeni, Duncan. A side view, natural size. 



9. The costse, magnified. 



10. A part of a calice, magnified. 



11. Trochocyathus Lakh, Duncan. A side view, natural size. 



12. The costse, magnified. 



13. Part of a calice, magnified ; pali before all the septa, except the smallest. 



14. Smilotrochus Jakhmari, Duncan. A side view, natural size. 



15. The costse, magnified. 



16. Another specimen, slightly magnified, side view. 



17. Its costse, magnified. 



18. Smilotrochus Blanpordi, Duncan. A side view, natural size. 



19. A part of the calice, natural size. 



20. The costse, magnified. 



21. The septa, magnified. (See also Plate III. Figure 1.) 



22. A side view of a young specimen. 



23. The costse, magnified. 



24. Rhabdophyllia Babkii, Duncan. A magnified view of part of a fractured portion, 



showing dissepiments, and a rudimentary septum between the larger ones. 



' |- Side views of the corallum of difierent specimens. 



27. A calice, magnified. 



28. The costse, magnified. 



