PLATE 35. 



Thecta ramosa. Devonian. 



1. Lateral view of a nearly perfeet coralliim from the Lower Devonian, 



Falls of the Ohio. Collection of the author. 



[Note.— The apex of growth of this example is just above the figure 1.] 



2. Upper portion of a frond (inverted) from the same horizon and place. 



Collection of the author. 



