PLATE XX 



PAGE 



Figs. 1-4. CYATHOPHYLLUM INEQUALE (Hall) 205 



1. Transverse section of coralla. 



2, 3. Portions of same. X 2 and X 5. 



4. Longitudinal section. X 2. 



Helderberg formation, Keyser member, Flintstone. 



Figs. 5-9. CYATHOPHYLLUM SCHUCIIEBTI Swartz n. sp 203 



5. Cluster of branching coralla. Devil's Backbone. 



6. Single stem. Cash Valley, Lower Stromatopora bed. 



7. Calyx. Same locality. 



8. 9. Transverse and longitudinal sections. Devil's Backbone. 



Helderberg formation, Keyser member. 



n 



