PLATE 132. 



Zaphrentis corniculum. Hudson Eiver Group. 



1. Left lateral view of an adult corallum, from the Hudson River 



Group of the Lower Silurian formation, near Milton. 



2. Oblique view of the calyces of two small inosculated coralla from 



the same place. 



3. View of the calyx of a small corallum from the same place. 



Zaphrentis spongiaxis. Niagara. 



4. Right lateral view of a corallum, from the white clay of the 



Upper Niagara, near Louisville. 



5. Lateral view of a corallum, with part of the calyx wall removed, 



so as to show the spongiose central cone; from the red clay of 

 the Upper Niagara, near Louisville. 

 6. View of the calyx, with walls fortuitously removed, and oblique 

 anterior view of a corallum, from the horizon and neighborhood 

 of specimen 4. Collection of Mr. Gaines. 



Zaphrentis unica, Nov. Spec. Niagara. 



7. Left lateral view of a corallum, from the red clay strata of the 



Upper Niagara, near Louisville. 



8. Similar view of a geniculated corallum, from the white clay beds 



of the Upper Niagara, near Louisville. 



9. Right lateral view of a corallum. 



10. Posterior view of a corallum. 



Specimens 9 and 10 from the horizon and vicinage of example 8. 



Zaphrentis radicans. Niagara. 



11. Anterior view of a corallum, with apex broken off, from the 



Upper Niagara red clay, near Louisville. 



12. Left lateral view of a corallum, with anterior calyx wall fortuitously 



removed, from the Upper Niagara red clay, near Louisville. 



13. Posterior view of a young corallum, from the horizon and vicinity 



of specimen 11. 



Amplexus shumardi. Niagara. 



14. Fragments of two coralla, partly imbedded in chert matrix, from 



the Upper Niagara red clay, near Louisville. 

 The specimens figured in this Plate, with the exception of 6, 

 belong to the collection of the author. 



