A very fine, natural internal mould of a head, showing the posterior surface and part of the ventral surface. Shows the strong oblique groove, both n2 palmar complex nerve canals, the left atrium, optic foramen, crescentic body, right cispharyngenal eye, hypocerebal process, posterior coelom, right and left palmer nerves and foramen, the base of the left pyriform body and the rectum. From Traveusot, Ille et Vilaine, Brittany, France.
Size: 20 mm x 15 mm partly on a block 20 mm by 25 mm
Size: 20 mm x 15 mm partly on a block 20 mm by 25 mm