Dissection of the proboscis (1), generally extruded from head (2) if specimen is anaethetised and relaxed, will expose the large whitish odontophore (3) supporting a substantial colourless transparent radula (4), seen through the transparent radular sac (5) which originates in a yellow, heart-shaped posterior proximal end (6).
7: bright orange or brown, bipectinate osphradium that tests the water quality of the inhalent current and, possibly, filters out large debris before the current reaches the ctenidium.
8: large, pale orange or yellow, unipectinate ctenidium (gill) with very long, spread filaments.
9: oviduct.
10: bright purple-pink posterior lobe of capsule gland (only on females).
11: tip of radula at mouth of proboscis.

Llŷn Peninsula, Wales, March 2016.