Trinucleus concentricus Trilobite Fossil

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.