Intense opaque white Y shaped mark on the oral tentacles and head with its stem passing back between the rhinophores. Cerata lighter than the rest of the body.
A large opaque white cnidosac (1) visible at the apex of each ceras.
Distance between oral tentacles at base (2–2) about three times thickness of tentacle base. Propodial tentacle (3).
Slug length 19 mm. Outer Hebrides, Scotland. April 2018. Leg. S. Taylor.