PLATE 15. 



Favosites pirum, Nov. Spec. Devonian. 



1. Lateral view of a corallum from the blue clay of the Middle Devo- 



nian, Falls of the Ohio. Collection of the author. 



2. Lateral view of a corallum from the same locality, showing a por- 



tion of the epithecated under surface and some of the corallets in 

 longitudinal section. Collection of the author. 



3. View of the epithecated under surface of a corallum; also showing 



the squamous walls of the corallets; from the ferruginous red 

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

 author. 



Favosites proximus, Nov. Spec. Devonian. 



4. Lateral view (inverted) of a corallum from the Lower Devonian, 



Falls of the Ohio. Collection of the author. 



5. Lateral view of a fiexuous form from the same locality. Collection 



of the author. 



6. Lateral view of a sub-ramous corallum from the same locality. Col- 



lection of the author. 



Favosites spiculatus, Nov. Spec. Devonian. 



7. Upper surface of a corallum from the Lower Devonian, Falls of the 



Ohio. Collection of the author. 



