PLATE 99. 



Blothropyllum 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. Spec. 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 cixctutum, 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 xiagarexse, 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. 



