PLATE XIV. 



Figure 1. Isastr^ea irreghjlaris, Duncan. Some calices^ magnified. 



2. A variety : caliceSj magnified. 



3. Pachyseris Murchisoni, D^Archiac and Haime. The upper surface of the coraUum^ 



natural size. 



4. A part of a series, magnified. 



5. PoRiTEs suPERPosiTAj Duncan. The corallum, natural size. 



6. A calieCj magnified. 



7. AsTRoctENiA CELLULATAj Duncan. CaliceSj magnified. 



8. The corallum of Placocyathus striatus^ Duncan. Natural size. 



9. Columella and pali^ magnified. 



10. CostsBj magnified. 



11. Blagrovia SIMPLEX, Duncan. The coral, natural size. 

 13. The base and costse, magnified. 



13. Septa at the calicular margin, magnified. 



