PLATE "l^.— Continued. 



Cyathophyllum FLOS, Nov. Spec. Niagara and Devonian. 



11. View of the calyx of a proliferous coralluin, from the stratum, of 



white clay seven feet below the Niagara and Devonian passage- 

 beds, near Louisville. 



12. Central view of a corallum of average size, from the same horizon 



and place. 



13. View of the calyx of a small corallum, from the Lower Devonian 



clay, near Louisville. 



14. View of the calyx of a large corallum, from the red clay of the 



Middle Devonian, near Louisville. 



Zaphrentis greenana, Nov. Spec. Devonian. 



15. Right lateral view of a medium-sized corallum. 



16. View of the calyx of a corallum. 



From the Middle Devonian clay, near Louisville. 



Zaphrentis romingeri, Nov. Spec. Devonian. 



17. View of the calyx of a corallum, from the red clay of the Middle 



Devonian, near Louisville. 



Nicholson lA (Nov. Gen.) canadensis. Devonian. 



18. Corallcts of continuous growth attached to a zaphrentis, from the 



blue clay of the Middle Devonian, near Louisville. 



NicHOLSONiA ADNATA, Nov. Spec. Devonian. 



19. Corallets incrusting a zaphrentis and overrunning a portion of the 



less robust N. canadensis. 

 The specimens figured in this plate belong to the collection of the 

 author. 



