PLATE XV. 



CORALS FROM THE LOWER GREENSAND. 



Fig. 



2. /Corallites of Trochosmilia Meyeri, Duncan. (P. 41.) 



3.J 



4 1 



'Calices, magnified. 



5. J 



6. Variety with broad base. 



7. Its calice, magnified. 



8. Part of the corallum oi Brachycyatlms Orhignyanus, Ed. and H. (P. 40.) 



9. Longitudinal view of the septa and pali, magnified. Tlie notch indicates the 



commencement of paU attached to tertiary septa. 



10. Corallum (cast) oi Isastrcea Morrisii, Duncan. (P. 42.) 



11. The cast, magnified. 



12. Impression, magnified. 



13. The corallum of Turhinoseris De-Fromenteli, Duncan. (P. 43.) 



14. A variety. 



15. Synapticulse and septa, magnified. 



16. Calice, size of life. 



17. Costae, magnified. 



18. The unusual appearance of septa ending in intercostal spaces, magnified. : 



