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 flexuous 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. 
