10 Aegires punctilucens

10 Aegires punctilucens

Gills (1) have white flecks and brown marks as on the protective, three-pronged lobes (2) and tubercles, but are less discernible because they are translucent.
They do not retract into a cavity but are often contracted and concealed by the lobes.
Menai Strait, Wales. March 2012.