PLATE 99. 
BLorHROPYLLUM DECORTICATUM. Devonian. 
1. View of the calyx of a corallum, with depressed floor. 
2. View of the calyx of a corallum, without a diaphragm. 
3. View of the calyx of a corallum, with the diaphragm as it com- 
monly appears. 
From the horizon and vicinage of example Fig. 1, Plate 98. 
BLOTHROPHYLLUM SESSILE, Nov. Spec. Devonian. 
4. View of the calyx of a corallum, from the blue clay of the Middle 
Devonian, Falls of the Ohio. 
5. Similar view of the calyx of a corallum, from the same horizon 
and place. 
BLOTHROPHYLLUM LOUISVILLENSE, Nov. Spee. Devonian. 
6. View of the calyx and oblique anterior view of a corallum, from 
the horizon and locality of B. sessile, Figs. 4. and 5. 
BLOTHROPHYLLUM CINCTUTUM, Nov. Spec. Devonian. 
7. View of the calyx of a corallum, from the Middle Devonian blue 
clay, Falls of the Ohio. 
8. Right lateral view of a small corallum, from the same horizon 
and place. 
BLOTHROPHYLLUM APPROXIMATUM. Devonian. 
9. Upper portion of a corallum, from the blue clay of the Middle 
Devonian, Falls of the Ohio. 
BLOTHROPHYLLUM NIAGARENSE, Nov. Spec. Niagara. 
10. Lateral view of a flexuous corallum, from the Upper Niagara - 
white clay stratum, ten feet below the Niagara and Devonian 
passage-beds, near Louisville. 
The specimens figured in this Plate are from the collection of the 
author. 
