PLATE 72. 



Drymopoka aulOporoidea, Nov. Spec. Devonian. 



1. 2. 3. 4. Front lateral views of corallets of prolific habit. 



5. Lateral views of two inos(;iilating coralla. 



6. 10. 11. Coralla of biserial growth. 



7. 8. Examples of quadriserial growth. 

 9. A triserial form. 



12. Basal corallets of a jejune community, attached to the upper surface 



of a Chetetes. 

 ExamjDles 1-11 are found in the encrinal limestone dark red clay 

 of the Upper Devonian, near Louisville. Specimen 12 was 

 gathered from the rotten chert of the Middle Devonian, Falls 

 of the Ohio. 



Drymopoka frutectosa, Nov. Spec. Devonian. 



13. Upper surface of a corallum composed of large corallets. 



14. Upper surface of a corallum wiioso corallets are of medium size. 



15. Under surface of a corallum. 



16. Front lateral view of a corallum. 



All from the horizon and vicinage of D. auloporoidea, Figs. 1-11. 



Drymopora intermedia. Devonian. 



17. Rear lateral view of corallets invested by Stromatopora granulata, 



from the Lower Devonian ferruginous clay, near Louisville. 

 Specimen 1 belongs to the collection of Mr. Gaines. The other 

 specimens herein figured are from the collection of the author. 



