J PLATE 135. 



Zaphrextis prolifica. Devonian. 



1. Left lateral view of a corallum, from the Middle Devonian red 



clay, near Louisville. 



Zaphrextis rafixesquj. Devonian. 



2. Lateral view of a flexuous adult corallum. 



3. Left lateral view of a corallum. 



4. Right lateral view of a corallum of medium size. 



5. Left lateral view of a young corallum, with radiciform processes 



of attachment. 



6. Posterior oblique view of a corallum, with radiciform processes of 



attachment. 

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



Zaphrextis yaxdelli. Devonian. 



7. Right lateral view of an adult corallum. 



8. Right lateral view of a corallum. 



Examples 7 and 8 are from the blue clay of the Middle Devonian, 

 Falls of the Ohio. 



9. Right lateral view of a fragment, with a portion of the wall re- 



moved, so as to show the lamellae and the diaphragm of the 

 calyx, and the siphuncular fovea connecting the calyx with the 

 interior cavity; from the red clay of the Middle Devonian, near 

 Louisville. 



Zaphrextis romixgeri, Nov. Spec. Devonian. 



10. Posterior view of arr~adult corallum, from the Middle Devonian 

 blue clay, Falls of the Ohio. 



The specimens figured in the Plate are from the collection of the 

 author. 



