PLATE 5. 



CoLUMNOPORA RAYi, Nov. Spec. Hudson River Group. 



1. Upper surface of a corallum found in Nelson county. Collection of 



the author. 



3. Lateral view of a corallum from the same locality. Collection of the 



author. 



CoLUMNOPORA CRiBRiFORMis. HudsoYi Rivev Group. 



2. Lateral view of a corallum found in Nelson county. 



4. Upper surface of a corallum from the same locality. Collection of 



the author. 



5. View of the under surface of a corallum from which the epitheca has 



been removed, showing diaphragms and mural pores; from Nelson 

 county. Collection of the author. 



