PLATE 56. 



Cladopora rcemeri. Devonian. 



1. Corallum (prostrate) partly imbedded in its matrix; from the Lower 



Devonian strata, Falls of the Ohio. Collection of the author. 



Cladopora bifurca, Nov. Spec. Devonian. 



2. Upper fronds of a corallum partly imbedded in its rock matrix ; from 



the Lower Devonian, Falls of the Ohio. Collection of the author. 



