PLATE 16. 



Favosites tuberosus. Devonian. 



1. Lateral view (prostrate) of a corallum of typical shape from the 



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



2. Similar view of a corallum from the same locality and horizon, show- 



ing opercula closing the orifices of some of the corallets. Collec- 

 tion of Mr. Gaines. 



3. Lateral view of upper portion of a specimen from the ferruginous 



clay of the Lower Devonian, near Louisville. Collection of the 

 author. 



Favosites ocellatus, Nov. Spec. Devonian. 



4. Lateral view (prostrate) of a corallum from the upper strata of the 



Lower Devonian, near Louisville. Collection of the author. 



