Left: red-brown striped specimens. Heights to 3.5 mm. Under stone resting on silt in large rock pool at LWS. Llŷn, Wales, October 2009.
Right: mixed population of white and striped forms. Northern Ireland, February 2014. © D.Craig.
Left: red-brown striped specimens. Heights to 3.5 mm. Under stone resting on silt in large rock pool at LWS. Llŷn, Wales, October 2009.
Right: mixed population of white and striped forms. Northern Ireland, February 2014. © D.Craig.