12 Calyptraea chinensis

12 Calyptraea chinensis

Mucous food-roll (1) crossing neck lobe on ciliated food track to the radula protruding from between the snout lobes (2). Wrinkled cylindrical penis (3) with bifid tip. Shell diameter 8 mm, maximum for male; may be changing into a larger female. Portland Harbour, England. April 2012.