PLATE 45, 
ALVEOLITES MORDAX, Nov. Spec. . Devonian. 
1. Upper surface of a corallum from the ferruginous clay of the Lower 
Devonian, near Louisville. Collection of the author. 
2 Lateral view of a small corallum, with corallets of the smallest size, 
from the same horizon, near Louisville. Collection of the author. 
