PLATE 97. 



Blothrophyllum liratum, Nov. Spec. Devonian. 



1. Left lateral view of a weathered corallum, with epitheca denuded, 



showing the ridge along the line of the apertural gap; from 

 the blue clay of the Middle Devonian, Falls of the Ohio. 



AuLACOPHYLLUM coxiGERUM, Nov. Spec. Devonian. 



2. Calyx of a corallum from the dark-red clay derived from the 



encrinal limestone of the Upper Devonian, near Louisville. 



AcROTHYLLUM CLARKi, Nov. Spec. Devonian. 



3. Right lateral view of a corallum of medium size, with flattened 



apex. 



4. Left lateral view of a large corallum with flattened apex. 



5. Posterior view of a corallum, with aj)ex taking shape from the 



object to which the corallum attached in the early stages of 

 growth. 



6. Posterior view of a corallum from which the ei)itheca has been 



removed by weathering. 

 Examples 3-6 are from the horizon and vicinage of A. conigerum, 

 Fig. 2. 



Cyathophyllum infoveatum, Nov. Spec. Devonian. 



7. View of the calyx and oblique anterior view of a corallum, from 



the Lower Devonian red clay, near Louisville. 



8. Similar view of a corallum, from the Upper Devonian encrinal 



limestone dark-red clay, near Louisville. 



Zaphrentis gallicalcar, Nov. Spec. Devonian. 



9. Posterior \'iew of a corallum of adult size. 



10. Anterior view of a corallum. 



11. Right lateral view of a corallum. 



12. 13. Views of calyces of coralla. 



14. Left lateral view of a young specimen. 



15. Left lateral view of a jejune corallum of irregular growth. 

 From the horizon and vicinage of A. conigerum. 



