These pyrite fossils are Pleuroceras spinatum found in the Lower Lias formation of Untersturmig, Germany. These creatures swam around in...

The identification of this crinoid calyx I am not so sure about.  The illustration was created by J. C. McConnell for the 1881 11th Annua...

This Eucalyptocrinus crassus crinoid calyx bears the remnants of a Crania sp. brachiopod.  These brachopods existed in the Middle Silur...