PLATE 97— Continued. 



Zaphrentis cornalba, Nov. Spec. Devonian. 



16. Left lateral view of an adult corallum. 



17. View of the calyx and oblique anterior view of a corallum. 

 From the horizon and vicinage of A. conigerum. 



Zaphrextis nettelrothi, Nov. Spec. Devonian. 



18. Left lateral view of an adult corallum. 



19. View of the calyx of a corallum. 



Found in the vicinage and horizon of A. conigerum. 



Aulopora precius. Niagara. 



20. Corallets incrusting an eroded fragment of Strombodes pentagonus. 



from the Upper Niagara red clay, near Louisville. 



Cladopora proboscidalis, Nov. Spec. Niagara. 



21. Front lateral view of frond partly imbedded in rock matrix, from 



the white clay strata of the Upper Niagara, near Louisville. 



Cladopora alcicornis, Nov. Spec. Devonian. 



22. Upper fronds of a corallum. 



23. Front lateral view of a frond of typical form. 

 From the horizon and vicinage of A. conigerum. 



Cladopora gultelmi, Nov. Spec. Devonian. 



24. Front lateral view of fronds partly imbedded in a fragment of 



decomposing encrinal limestone; from the horizon and neighbor- 

 hood of A. conigerum. 



With the exception of example 4, which was collected by Mr. 

 Gaines, the specimens figured in this Plate belong to the collec- 

 tion of the author. 



