PLATE 103. 



Nettelrothia (Nov. Gen.) crateriforme, Nov. Spec. Devonian. 



1. View of the under surface of a sarcodeme. 



2. Lateral view of a sarcodeme (inverted). 



From the encrinal limestone of the Upper Devonian, near Louis- 

 ville. 



[Note. — This form does not belong to the Polypi, but to the Protista. For this reason it is not 

 described in the descriptive text of this work. It will be described in another work now in prepa- 

 ration.] 



Hadrophyllum d'orbignyi, Devonian. 



3. 4. 5. 6. 7. VieAvs of calyces of coralla. 



8. 9. 10. 11. Lateral views of coralla of varying form and size. 

 From the red clay of the Middle Devonian, near Louisville. 



Chonophyllum magnificum. Devonian. 



12. Lateral view of a corallum, from the ferruginous clay of the 



Lower Devonian, near Louisville. 



13. Lateral view of a corallum, with epitheca denuded, from the man- 



ganese limestone of the Lower Devonian, Falls of the Ohio. 



14. View of a portion of the calyx of a well preserved fragment, from 



the horizon and neighborhood of example in Fig. 12. 



With the exception of example 14, which belongs to Mr. McCon- 

 athy, the specimens herein figured are from the collection of 

 the author. 



