19 Steromphala umbilicalis. H. 7.9mm, B. 12mm. Aug. 2013. Menai Strait, Wales.

19 Steromphala umbilicalis. H. 7.9mm, B. 12mm. Aug. 2013. Menai Strait, Wales.

Dorsal surface of foot densely covered in tubercles in longitudinal rows; ground colour yellowish covered with dense-brown or dark-purple except peripherally. Foot periphery finely fringed. Sole yellowish-white.