Unidentified Crinoid Pinnules Fossil

Here is an unidentified crinoid arm with pinnules found in the Lexington Limestone of Franklin County Kentucky USA. The fossil dates to the Upper Ordovician Period.
Thanks to Kenny for images.

Ptychodus decurrens Shark Tooth Fossil

This image is of a Ptychodus decurrens (Agassiz) shark tooth fossil from the Cretaceous Period. Found in the Chalk of Kent England. Displayed at the British Natural History Museum London as of August 2016.

Learn more here: http://www.chalk.discoveringfossils.co.uk/5%20Ptychodus.htm

Terebrirostra lyra Fossil

This image is of a Terebrirostra lyra (J. Sowerby) brachiopod fossil from the Late Cretaceous Period (Lower Cenomanian). Found in the Warminster Beds Horningsham Wilts. England. Displayed at the British Natural History Museum London as of August 2016.