Left: nigrolineate form with black/brown lines in the grooves and a broad spiral band of pale grey on the ribs. H. 10.1 mm, Anglesey, Wales. March 2015.
Right: unbanded yellow, buff and reddish forms. Cornwall 2011. © T. Pearman.
Left: nigrolineate form with black/brown lines in the grooves and a broad spiral band of pale grey on the ribs. H. 10.1 mm, Anglesey, Wales. March 2015.
Right: unbanded yellow, buff and reddish forms. Cornwall 2011. © T. Pearman.