PLATE VIII. 



CORALS FROM THE UPPER GREENSAND. 



Fig. 



i; 



2. 

 3. 

 4. 



Corallites of Onchotrocus Carteri, Duncan. (P. 20.) 



11. 

 13.J 



6. A worn calice, magnified. Fossilization has produced a false union of tlie septa, 

 and a central space. 



7.^ 



I Sections of the same specimen. The central tissue is due to fossilization. 



o. J 



9. A normal calice, magnified. 



12. [-The costal and e])ithecal structures of three different specimens. 

 14.J 



15. Tlie corallum of Cyalhophora monticularia, D'Orb., sp. (P. 21.) 



16. A portion, magnified. 



17 1 



" \ Sections magnified, showing the endotheca, and in fig. 18 one of the tablulae. 

 1 8. J 



