Glycimeris glycimeris ( Linne ).
12 juvenile 'Dog Cockle 'shells in a glass mount. Collected by sieving in 1975. Four of the valves have circular holes drilled in them by predatory Gastropods. Nice detail under magnification.
Pliocene, Red Crag.
Walton-on-the-Naze, Essex.
Slide : 7.7 x 2.2 x 0.7 cm.