PLATE 117. 



Diphyphyllum coalescens, Nov. Spec. Devonian. 



1. View of the upper surface of a corallum, from the upper rock strata 



of the Middle Devonian, Falls of the Ohio. 



Diphyphyllum coagulatum, Nov. Spec. Devonian. 



2. View of the upper surface of a corallum, from the horizon and 



neighborhood of the preceding species. 

 Collection of the author. 



