PLATE SO.— Continued. 



Cyathophyllum greeni, Nov. Spec, Devonian. 



14. View of the calyx of a corallum, from the Middle Devonian, Falls 



of the Ohio. 



NicHOLsoxiA CANADENSIS. Devonian. 



15. Corallets attached to Stromatopora, from the Middle Devonian, 



Falls of the Ohio. 



NiCHOLSONiA ANGULATA, Nov. Spec Devonian. 



16. Corallum incrusting Stromatopora texilis, from the blue clay of the 



Middle Devonian, Falls of the Ohio. 



Cyathophyllum multigemmatum, Nov. Spec. Devonian. 



17. View of confluent calyces of corallets, from the Middle Devonian 



waste, Marion county, Kentucky. 



Zaphrentis immanis, Nov. Spec, Devonian. 



18. Central view and oblique view of calyces of twin coralla, from the 



Middle Devonian clay, near Louisville. 

 The examples figured in this plate belong to the collection of the 

 author. 



