PLATE 115. 



Diphyphyllum gigas. Devonian. 



1. Lateral view of a weathered corallum, from the Middle Devonian 



rocks, Falls of the Ohio. 



2. View of the upper surface of a fragment, from the Middle Devo- 



nian red clay, near Louisville. 



Diphyphyllum panjcum. Devonian. 



3. 4. View of the upper surfaces of small coralla, from the Middle 



Devonian red clay, near Louisville. 



Collection of the author. 



