PLATE 93. 



Cyathophylltjm ovoideum, Nov. Spec. Devonian. 



1. Upper surface of a corallum from the decomposed chert of the 



Middle Devonian, near Louisville. 



Cyathophylltjm davidsoni. Devonian. 



2. Upper surface of a corallum from the rotten chert of the Middle 



Devonian, Falls of the Ohio. 



Cyathophyllum rugositm. Devonian. 



3. Upper surface of a fragment showing cristate calyx-walls, from the 



Middle Devonian red clay, near Louisville. 

 Collection of the author. 



