Dissected female, mantle intact. Terms are defined in glossary below.
1: sole of foot. 2: dorsum of foot.
4: operculum. 5: mantle edge.
6: unblotched mantle.7: darkly blotched mantle.
8: respiratory inhalent siphon.
9: osphradium (under mantle).
10: ctenidium (under mantle).
11: hypobranchial gland,(under mantle)
12: kidney. 13: digestive gland.
14: stomach (two ends of). 15: ovary.
16: auricle of heart. 17: ventricle of heart.
Llŷn Penisula, Wales, March 2016.