PLATE 78.—Continued. 
CYATHOPHYLLUM FLOS, Nov. Spec. Niagara and Devonian, 
11. View of the calyx of a proliferous corallum, 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. 
Nicuousonra (Nov. Gen.) CANADENSIS. Devonian. 
18. Corallets 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. 
