PLATE 73. 
AULOPORA EDITHANA. Devonian. 
1. Corallum incrusting the dorsal valve of Strophomena hemispherica, 
from the rotten hornstone of the Middle Devonian, Falls of the 
Ohio. Collection of the author. 
2 
RoMINGERIA INCRUSTANS, Nov. Spec. Devonian. 
2. Corallum, somewhat eroded, incrusting Cyathophyllum pocillum. 
3. Under surface and lateral view of a corallum. 
4. Upper surface of a corallum. 
From the Middle Devonian, Falls of the Ohio. Collection of the 
author. 
AvLoporA PyaM@a, Nov. Spec. Magara. 
5. Corallum incrusting Thecia swindernana, from the Upper Niagara 
white clay, near Louisville. 
6. Example incrusting Stromatopora concentrica, from the Upper Ni- 
agara red clay, near Louisville. 
Collection of the author. 
AULOPORA CORNUTA. Devonian. 
7. Corallum incrusting interior and margin of calyx of Cyathophyllum 
corniculum, from the Middle Devonian, Falls of the Ohio. Col- 
lection of the author. 
8. Corallum incrusting fragment of Cyathophyllum scyphus, from the 
Upper Devonian dark red encrinal limestone clay, near Louis- 
ville. Collection of Mr. Gaines. 
AULOPORA, CULMULA, Nov. Spec. Devonian. 
9. Corallum incrusting a jejune frond of Favosites clausus, from the 
Lower Devonian, Falls of the Ohio. Collection of the author. 
NicuHousonia (Nov. Gen.) CANADENSIS. Devonian. 
10. 11. Corallets incrusting a Fenestella, from the rotten chert of the 
Middle Devonian, Falls of the Ohio. Collection of the author. 
[The corals and bryozoa both being white, the photographic deline- 
ation of the former is unsatisfactory, although the examples are 
good. | 
AULOPORA PROCUMBENS, Nov. Spec. Devonian. 
12. Corallets incrusting a species of Stromatopora, from the Lower 
Devonian ferruginous clay, near Louisville. Collection of the 
author. ; 
13. Corallets similarly incrusting Stromatopora, from the horizon and 
place of example 12. Collection of Mr. McConathy. 
