A natural internal mould of the posterior aspect of a head showing he left & right cispharyngeal optic nerve extending from the optic foramen, with the crescentic body between them. The right palmar nerve and the hypercerebral processes are also visible. From Traveusot, Ille et Vilaine, Brittany, France.
Size: 13 mm x 5 mm on a block 20mm by 15 mm
Size: 13 mm x 5 mm on a block 20mm by 15 mm