PLATE 33. 



Favosites cavernosus. " Devonian. 



1. Lateral view of the base and fronds of a nearly perfect corallum, from 



the Middle Devonian, Falls of the Ohio. Collection of the author. 



2. Well preserved fragment from the same horizon, east of Louisville. 



Collection of the author. 



3. 4. 5. Fragments such as are commonly obtained, with walls abnor- 



mally inerassated; from the encrinal limestone clay of the Upper 

 Devonian, near Louisville. Collection of the author. 



