PLATE 98. 
BLOTHROPHYLLUM DECORTICATUM. Devonian. 
1. Lateral view of an adult corallum of average size and usual form, 
from the Lower Devonian rocks, Falls of the Ohio. 
2. Lateral view of the upper portion of a corallum partly imbedded 
in its rock matrix, with closely set explanate rims of the invag- 
inating calyces; from the rocks of the Lower Devonian formation, 
near Louisville. 
Collection of the author. 
