PLATE 49. 
CLADOPORA COMPLANATA, Nov. Spee. 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. Magara. 
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. 
SYRINGOPORA 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. 
