PLATE 75. 
RoMINGERIA VANNULA, Nov. Spec. Niagara. 
1. Upper surface of corallets from the Upper Niagara white 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 surface of two inosculated cymes, from the Upper Niagara 
red clay, near Louisville. Collection of the author. 
RoMINGERIA Uva, Nov. Spec. 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. Upper 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. J ejune corallets from the same place. Collection of the author. 
RoMINGERIA FASCICULATA, Nov. Spec. 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. Spee. Devonian. 
17. Corallets incrusting Cladopora imbricata, from the Lower Devo- 
nian rocks, Falls of the Ohio. Collection of the author, 
