Unknown Horn Coral

This coral came out of an area of Devonian corals in Jefferson County, Kentucky. I think it might be some sort of Heliophyllum. The outside seems to have eroded away somewhat.

Hexagonaria cincta

Here is a Devonian coral called Hexagonaria cincta found in Jeffersonville Limestone in Jefferson County, Kentucky (Louisville).

Unknown Horn Coral

Here is a Devonian horn coral found in Jefferson County, Kentucky.