PLATE 106. 
PrycHoOPHYLLUM TROPEUM, Nov. Spec. Devonian. 
1. (Lower right specimen.) Anterior view of a corallum of average 
size. 
2, (Lower central specimen.) Posterior view of a corallum. 
3. View of the calyx of a large corallum. 
From the Lower Devonian rocks, Falls of the Ohio. 
PTYCHOPHYLLUM DIAPHRAGMA, Nov. Spec. Devonian. 
4, (Lower left specimen.) Left lateral view of an adult corallum. 
5. View of the calyx of a corallum, with portion of the right wall 
fortuitously broken. 
From the horizon and vicinage of the preceding species. 
PrycHOPHYLLUM TyPicuM, Nov. Spee. Devonian. 
6. Right lateral view of a corallum, from the Middle Devonian clay 
of Lincoln county. 
7. View of the calyx of a corallum, from the blue clay of the Middle 
Devonian, Falls of the Ohio. 
PTYCHOPHYLLUM CONIFERUM, Nov. Spec. Devonian. 
8. (Right of center.) Right lateral view of a corallum, from the 
Lower Devonian clay of Lincoln county. 
9. (Left of center.) Posterior view of a corallum, from the Lower 
Devonian rocks, Falls of the Ohio. 
10. Right lateral view of a corallum. 
11. (Upper central specimen.) Right lateral view of a corallum, with 
calyx wall broken down so as to show the sub-vesicular cen- 
tral cone. 
Examples 10 and 11 are from the horizon and vicinage of exam- 
ple 9. 
The specimens figured in the Plate are from the collection of the 
author. 
