PLATE X. 



CORALS FROM BROCASTLE ; MARTON, NEAR GAINSBOROUGH ; NEWARK, IN NOTTINGHAMSHIRE ; 

 AND FROM THE NORTH OF IRELAND. 



Fig. 



1. Thecosmilia Br odiei, Dun can. (P. 13.) The upper part of a corallite, natural size. 



2. The calice, magnified. 



3. A side view of a septum, magnified. 



4. A septum seen from above, magnified. 



a. Some corallites of Thecosmilia irregularis, Duncan. (P. 15.) Showing the gemmation from 



the calicular edge, and the rough and ridged epitheca. 



6. A corallite of Thecosmilia Martini, E. de From. (P. 14.) 

 7 and 8. Views of its transverse section and calice, magnified. 



9. Corallites, with strojig epitheca. 



10. A section of a cast of Thecosmilia Michelini, Terquem. (P. 14.) From Cow bridge, magnified. 



1 1. The calicular end of a corallite. 



12. The calice, magnified. 



13. A corallite, showing the rounded ridges of the epitheca. 



14. A calice. 



15. The upper surface of Montlivaltia papillata, Duncan. (P. 36.) 



16. A side view of the calice. 



17. Septal dentations, magnified. 



18. The base of the corallum. 



19. Montlivaltia jiajjillata, Dnnc&n, xariety. (P. 37.) Its calice. 



20. The side of the calice. 



21. The septa seen from above, magnified. 



22. Montlivaltia Hibernica, Duncan. (P. 39.) Its calice. 



23. The septa seen from above, magnified. 



24. Montlivaltia Ilaimei, Cha^uis et Dewalque. (P. 35.) The Irish form. View of the calice. 



25. The septa seen from above, magnified. 



26. A variety of Montlivaltia Haimei. The calice. 

 27 and 28. Views of the corallum. 



29. A variety of Montlivaltia Haimei. The calice. 



30. The side view of the corallum. ^ 

 31 and 32. Unusual shapes of the corallum. 



33. Oppelismilia yemmans, Duncan. (P. 39.) The calicular surface, showing calicular gem- 



mation. 



34. The side view of the corallum. 



