Crinoid Disc Top Down View

Here is another crinoid disc showing the center of the stem.

I think the center is an agate since you can see layers in it.

This specimen came from Lake Cumberland in Kentucky.

Inside Crinoid Stem

Here is the inside view of a Mississippian crinoid from Lake Cumberland.

It is neat to see the disc segments and inside stem column.

Eucladocrinus kentuckiensis Crinoid

Here is a crinoid disc from Lake Cumberland and it appears to be Eucladocrinus kentuckiensis.

This species is documented in the The University of Kansas Paleontological Contributions Echinodermata, Article 9, Plate 4, Figure 7, Classification and Nomenclature of Fossil Crinoids Based on Studies of Dissociated Parts of Their Columns by Raymond C. Moore and Russell M. Jeffords. The publication was dated January 26, 1968.

I think this looks like cat eye.