PLATE XII. 



CORALS FROM THE LOWER LIAS. 

 Via. 



1. Thecosmilia Martini, E. de Froraentel. (P. 45.) 



2. Part of its epitlieca magnified. 



3. Monflivaltia Riiperti, Duncan. (P. 4G.) 



4. Its calice. 



5. The calice, magnified. 



6. A young specimen oi Montlivaltia Guettardi, Blainville. fP. 51.) 



7. The calice, magnified. 



'"■) 



11.- A full-grown specimen. (P. 51.) 

 12.) 



13. Its calice, magnified. 



14. The septa, magnified. 



S. The calicular surface of a young Thecosmilia Martini. 



9. The same, magnified. 



15. Lepidopliyllia Stricklandi, Duncan. (P. 53.) 



16. A cast of Thecosmilia Michelini, Terquem. (P. 51.) 



17. Part of the corallum of Isastraa endothecata, Duncan. (P. 53.) 



18. A regular calice, magnified. 



19. A side view of a magnified calice, showing the endotheca in the calice. 



20. Oblique view of some cahces, magnified. 



21. Endothecal dissepiments connecting the septa, magnified. 



