Dissected female; mantle cut and opened to right except on part of mantle cavity.

Terms are defined in glossary below.

1:  sole of foot. 2: dorsum of foot. 3: cephalic tentacle.

4: operculum. 5: mantle edge.

7: darkly blotched mantle. 8: respiratory inhalent siphon.

9: osphradium. 10: ctenidium.

11: hypobranchial gland. 12: kidney.

13: digestive gland. 14: stomach.

15: ovary. 18: proboscis sheath seen through translucent body wall.

20: ova.

Llŷn Peninsula, Wales, March 2016.