PLATE VII. 
CORALS FROM THE UPPER GRELNSAND. 
Fic. 
1.) Various shapes of the corallum of Smilotrochus elongatus, Duncan. (P. 19.) The 
2 specimens are worn, and the corallites are in the form of casts. Small portions 
3. of the original hard parts still remain. 
4. A transverse section of a corallum, slightly magnified. 
i The casts of the intercostal spaces simulating costa, slightly magnitied. 
7. The corallum of Smilotrochus angulatus, Duncan. (P. 20.) 
5. ‘The transverse section, slightly magnified. (The specimens are in the form 
of casts.) 
9. The corallum of Pavia minutissina, Duncan. (P. 22.) 
10. <A portion, magnified. 
11. Endothecal structures of the corallum, magnified. 
12. The corallum of Simelotrochus Austeni, Hdwards and Haime. (P. 19.) Copied 
from the ‘ Hist. Nat. des Coralliaires.’ 
13. The corallum of Zhamnastrea superposita, Michelin, sp. (P. 22. 
a Specimens from the French Upper Greensand. 
16. A corallum, magnified. 
17. <A calice, close to the edge of the corallum, magnified and drawn with the camera 
lucida. The continuous coste are to be observed inferiorly. 
