PLATE 55. 



Ci.adopora pingttis. Devonian. 



1. Front lateral view of a corallum from the Lower Devonian, Falls of 



the Ohio. Collection of Dr. Knapp. 



2. Upper surface of a basal expansion, showing corallets of different 



sizes; from the ferruginous clay of the Lower Devonian, near 

 Louisville. Collection of the author. 



3. Front lateral view of the pedicle with portions of fronds, showing 



differently sized corallets; from the horizon and neighborhood of 

 example 2. Collection of the author. 

 Cladopora roemeri. Devonian. 



4. Fragment from the Lower Devonian red clay, near Louisville. Col- 



lection of Dr. Knapp. 



