PLATE Xn. 



CORALS FROM THE GAULT. 



Fig. 



2' J- Varieties of Trochocyathus Harveyanus, Ed. and H. (P- 33.) 



3. Magnified view of the ends of the costse of one of the varieties. 



4. A longitudinal section of a variety, slightly magnified. 



5. A variety of Bathycyathus Soiverbyi, Ed. and H. (P. 35.) 



6. Its costse, magnified. 



7. The corallum of Bathycyathus Sowerbyi, Ed. and H. (P. 35.) 



8. A variety of Caryophyllia Bowerhanki, Ed. and H. (P. 32.) 



9. Its costae, magnified. 



10 to 16. Views of Smilotrochus elonyatus, Duncan. (P. 36.) 

 12. Costae, magnified. 



14. The calice of a young specimen, magnified. 



16. The costge, magnified. 



17. Cov?L\\\im o{ Smilotrochus insiynis,V>\\nc?ix\. (P. 37.) 



