Ogygiocarella debuchii (Brongniart 1822.
Like all modern Arthropods, trilobites had to shed their exoskeleton annually in order to grow. Nice example of a moulted individual (or exuviae). Easy to determine as both the librigenes are missing from the cephalon.
Ordovician, 'Llandeilo' Stage, Teretiusculus Zone, Meadowtown Beds.
Betton Wood Quarry near Leigh, Shropshire.
Trilobite : 1.8 cm long.
