An exceptionally fine complete internal mould in sharp relief, showing excellent detail. Though the impression of the large hyperstome obscures some of the glabellar detail, the eyes and facial sutures show well, the thorax and pygidium are particularly well preserved, and both the cephalic and pygidial borders show terrace lines. From Porthmadog North Wales.
Size: 78mm by 42mm on block 95mm by 55mm
Size: 78mm by 42mm on block 95mm by 55mm