PLATE 95. 



Aulacophyllum sulcatum. Devonian. 



1. Anterior, or central-gap view and view of the calyx of a corallum, 



from the Middle Devonian rocks, Falls of the Ohio. 



2. Left lateral view of a weathered corallum, from the Middle Devo- 



nian red clay, near Louisville. 



3. Posterior, or apertnral-gap view of a weathered corallum, from the 



Middle Devonian red clay, near Louisville. 



[Note. — The arrangement of the lamellae about the line of the apertural-gap may be observed.] 



Aulacophyllum pakvum, Nov. Spec. Devonian. 



4. View of the central-gap line and of the calyx of a corallum, from 



the red clay of the Middle Devonian, near Louisville. 



Aulacot-hyllum unguloideum, Nov. Spec. Devonian. 



5. View of central-gap line and of the calyx of a corallum of medium 



size, from the Lower Devonian rocks, Falls of the Ohio. 



[Note. — In this specimen are conspicuously shown the four gaps proper to Cyatliophylloids, and 

 the consequent fascicular grouping of the lamellae.] 



6. Similar view of a corallum, in which the central and lateral gaps 



are obscure, but showing the lamella occupying the center of the 

 apertural-gap fovea. 



7. Left lateral-gap view of a corallum (prone). This and example 6 



are from the same horizon and place as example 5. 



[Note. — The arrangement of the lamellae about the line of the left lateral gap is noticeable.] 



8. View of the calyx of a weathered corallum, from the Lower Devo- 



nian ferruginous clay, near Louisville. 



[Note. — In this example some of the lamella? beyond the lateral gaps remain erect, and by their 

 co-incidental meeting have the appearance of continuous plications from opposite margins of the wall.] 



AuLACorHYLLUM ixsiGNE. Devonian. 



9. View of the central gap and of the calyx of a corallum, whose 



lamelhe are fortuitously broken down in the calyx bottom. From 

 the manganese limestone of the Lower Devonian, Falls of the 

 Ohio. 

 The examples are from the collection of the author. 



