During long daily exposure to atmosphere, breathes air with well vascularised surface of mantle cavity. Air expelled as bubbles over exhalent right neck-lobe on re-immersion.
Shell height 16 mm, breadth 19 mm. Weymouth, Dorset. April 2012.
During long daily exposure to atmosphere, breathes air with well vascularised surface of mantle cavity. Air expelled as bubbles over exhalent right neck-lobe on re-immersion.
Shell height 16 mm, breadth 19 mm. Weymouth, Dorset. April 2012.