This picture is of a
Trinucleus concentricus (Eaton,1832) trilobite
fossil. It was found in Caer Caradoc (Grande-B.). The fossil dates to Ordovician
Period. Fossil displayed at Muséum National D'Historie Naturelle
Jardin Des Plantes Paléontologie et Anatomie Comparée, Paris, France.
Image taken August 2016.