PLATE 104, 
CYATHAXONIA GAINESI, Nov. Spec. Niagara. 
1. View of the calyx of a corallum. 
Anterior view of a young corallum. 
Left lateral view of a corallum. 
Right lateral view of a corallum. 
Posterior view of a corallum. 
Anterior view of a corallum. 
From the lowest strata of the Niagara period, near Louisville. 
Ser St oe 
PrycHOPHYLLUM Ipoma@a, Nov. Spec. Niagara. 
7. (Upper left specimen.) Under surface of a corallum, from the 
Upper Niagara white clay, near Louisville. 
OMPHYMA VERRUCOSA. Niagara. 
8. (Central specimen.) Right lateral view: of a corallum, from the 
Upper Niagara ferruginous clay, near Louisville. 
9. (Right central specimen.) Right lateral view of a corallum, from 
the white clay beds of the Upper Niagara, near Louisville. 
10. Posterior view of a corallum, with part of the calyx wall broken off. 
11. Anterior view of a large corallum, with partially denuded epitheca. 
Examples 10 and 11 are from the horizon and vicinage of exam- 
ple 8. 
All the specimens are from the collection of the author. 
