A fine complete internal mould featuring large compound eyes with the lenses arranged in 19 dorso-ventral files with a general lens formula 567 787 877 543 2. From North Esk Inlier, Deerhope Burn, Pentland Hills, Scotland.
Size: 24 by 15mm on a block 50mm x 35mm
Size: 24 by 15mm on a block 50mm x 35mm