PLATE 55. 

 Ci.ADOPORA PiNGUis. Devonian. 



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



the Ohio. Collection of Dr. Knapp. 



2. L^pper surface of a basal expansion, showing corallets of diiferent 



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 

 exam])le 2. Collection of the author. 

 Cladopor.v rcemeri. Devonian. 



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



lection of Dr. Knapp. 



