TAB. XXI. 

 CORALS FROM THE GREAT OOLITE. 

 MONTLIVALTIA SmITHI (p. 110). 



Fig. 1 . Side view of an adult specimen ; natural size. 

 1 a. Another specimen much shorter. 



1 h. Calice ; natural size. 



Stylina conifera (p. 105). 



Fig. 2. A fragment ; natural size. 



2 a. A few corallites magnified. 



Cyathophora Pratti (p. 108). 



Fig. 3. A small mass ; natural size. 



3 a. A few corallites magnified. 



Thamnastrea Lyellii (p. 118). 



Fig. 4. Fragment, on part of which the calices are in their normal state ; whereas 

 towards the left side they are modified by the action of water and other 

 agents. 



4 «, 4 (5. Calices, situated in different parts of the same compound mass, magnified. 



