27 Patella vulgata

27 Patella vulgata

The mantle cavity consists of a nuchal cavity over the head (1), and a pallial groove filled with pallial gills (2) around the entire periphery of the foot-head; there is no ctenidium. Foot has whitish sides (3) and dirty yellow sole (4). Shell length 34 mm. Mersey Estuary, August 2017.