PLATE 74. 



AuLOPORA SERPENS. Devonian. 



1. (Upper left-hand specimen.) Corallets incrusting under surface of 



Stromatopora texilis, from the Lower Devonian rocks, Falls of the 

 Ohio. 



2. Corallets incrusting a fragment of Favosites, from the Lower Devo- 



nian red clay, near Louisville. 



Drymopora intermedia. Devonian. 



3. View of the corallum figured in Plate 72. 



4. Basal corallets attached to a fragment of Favosites canadensis, from 



the Lower Devonian rocks. Falls of the Ohio. 



Romingeria incrustans, Nov. Spec. Devonian. 



5. Corallets incrusting a frond of Cladopora cryptodens, from the Lower 



Devonian, Falls of the Ohio. 



DiORYCHOPORA (Nov. Gen.) tenuis, Nov. Spec. ^ Niagara. 



6. Corallum (inverted) from the Upper Niagara white clay, near Lou- 



isville. 



DpYMOPORA FASCicuLARis. Devonian. 



7. Fragment from the Lower Devonian, Falls of the Ohio. Collected 



by Dr. Theiss. 



Cladopora francisci. Devonian. 



8. Upper fronds of a corallum from the Lower Devonian, Falls of the 



Ohio. 

 The specimens horein figured are from the collection of the author. 



