PLATE 9. 



Favosites cristatus. Niagara. 



1. Lateral view of a weathered corallum from the ferruginous clay, near 



Louisville. Collection of the author. 



2. 3. 4. 5. Lateral views of several coralla from the white clay, near 



Louisville. Collection of the author. 



Favosites louisvillensis, Nov. Spec. Niagara. 



6. Upper surface of a corallum found near Louisville. Collection of 

 the author. 



Favosites venustus. Niagara. 



1. Epithecated under surface of a corallum from the white clay, near 

 Louisville. Collection of the author. 

 10. Upper surface of a fragment, showing spinulous walls; from the 

 same locality. Collection of the author. 



Favosites discus, Nov. Spec. Niagara. 



8. Upper surface of a fragment from the white clay, near Louisville. 



Collection of tlie author. 



9. Under surface of a corallum, from which the epitheca has been. 



eroded ; near Louisville. Collection of the author. 



