PLATE III. 



CORALS FROM THE CHALK. 



Fig. 



1. Tlie corallum of Trochosmilia {Ccelosmilia) Wiltshiri, Duncan. (P. 9.) 



2. A portion of the calice, magnified. 



3. A side view of one of the septa, magnified. 



4.1 



. > Magnified views of the costse. 



6. The corallum of Trochosmilia [Ccelosmilia) cornucopice, Duncan. (P. 8.) 



7. The calice, magnified. 



8. The costse near the calicular margin, magnified. 



9. The arrangement of the septa as regards their size (a diagram). 

 10. The peduncle, magnified. 



I Specimens of Trochosmilia {Ccelosmilia) laxa, Ed. and H., varieties. (P. 



12.1 ,^ .r. . 



r Magnified portions. 



"■1 



16. >Cost3e, magnified. 

 18.J 



17. A diagram of the septal arrangement. 



