PLATE 49. 



Cladopora complanata, Nov. Spec. Niagara. 



1. Lateral view (half inverted) of a portion of a frond from the Upper 



Niagara white clay, near Louisville. Collection of Dr. Knapp. 



Cladopora aculeata, Nov. Spec. Niagara. 



2. Lateral view (half inverted) of a portion of a corallum, from the 



horizon and place where the preceding specimen was gathered. 

 Collection of Dr. Knapp. 



Syresgopora tubiporoides. Devonian. 



3. Section of several corallets, partly imbedded in the rock matrix, 



showing the conical invaginating diaphragms; from the Lower 

 Devonian rocks, Falls of the Ohio. Collection of Dr. Knapp. 

 Favosites clausus. Devonian. 



4. Portion of a corallum from the Lower Devonian rocks, Falls of the 



Ohio. Collection of the author. 



