PLATE 85. 



Cyathophyllum robfstum. Devonian. 



1. Adult corallum: left lateral view. 



2. Right lateral view of a corallum. 



3. Calyx of a corallum, the linear edges of whose lamellae arc broken 



down so as to show the cellulose inner walls. 



4. Right lateral view of a 3'oung corallum. 



5. (Central specimen.) View of calyx and central exterior of an un- 



symmetrical jejune corallum, with well-preserved acute lamellae 

 but abnormally shaped diaphragm. 

 The exam]>les figured were cut from the Lower Devonian rocks, 



Falls of the Ohio. 

 Example 4 is from the collection of Mr. Gaines; the others from 

 the collection of the author. 



