1: long, slender, translucent, white cephalic tentacles.

2: pitch-brown/black pigment blotches interrupting indistinct pale yellow border on rim of mantle, but no dark blotches on shell.

3: irregular, opaque, yellow blotches but not extensive well-defined lines on dorsal surface of foot.

4: concave tip on foot as lateral chamfers much reduced at posterior.

Height 10.5 mm. Menai Strait, Wales. August 2010.