PLATE 75. 



RoMiNGERiA VANNULA, Nov, Spec. Niagara. 



1. Upper surface of corallets from the Upper Niagara Avhite clay, near 



Louisville. Collection of Mr. Nettelroth. 



2. Similar view of corallets from the same horizon and locality. Col- 



lection of Mr. Gaines. 



5. Similar view of corallets attached to a Favosites, from a lower 



horizon of the same group, near Louisville. Collection of the 

 author. 



3. Under surfoce of two inosculated cymes, from the Upper Niagara 



red clay, near Louisville. Collection of the author. 



RoMiNGERiA UVA, Nov. Spcc. Niagara and Devonian. 



6. Basal corallets incrusting a Fenestella frond, from the rotten chert 



of the Middle Devonian, Falls of the Ohio. Collection of the 

 author. 



7. Corallum from the Upper Niagara white clay stratum three feet 



below the passage-beds, near Louisville. Collection of the author. 



RoMiNGERiA UMBELLiFERA. Devonian. 



4. U})per surface of two cymes, from the Lower Devonian, Falls of the 



Ohio. Collection of the author. 



8. Fragment showing verticillate sprouts, from the Lower Devonian 



red clay. Collection of Mr. Nettelroth. 



9. Similar fragment from the Lower Devonian rocks. Falls of the 



Ohio. Collection of the author. 

 10. 11. 12. Fragments from the horizon and place of example 9. Col- 

 lection of the author. 



13. Jejune corallets from the same place. Collection of the author. 



RoMiNGERiA FAscicuLATA, Nov. Spoc. , Devonian. 



14. 15. 16. Lateral views of corallets from the decomposing chert of 



the Middle Devonian, Falls of the Ohio. 

 18. Upper surface of corallets from the same place. 

 Collection of the author. 



RoMiNGERiA INCRUSTANS, Nov. Spec. Devonian. 



17. Corallets incrusting Cladopora imbricata, from the Lower Devo- 

 nian rocks, Falls of the Ohio. Collection of the author. 



