26 Nucella lapillus. Shell height 27mm. Mouth of Mersey Estuary, England. July 2014.

26 Nucella lapillus. Shell height 27mm. Mouth of Mersey Estuary, England. July 2014.

Basal two thirds of cephalic tentacle thickened by fusion with eye peduncle; black eye on summit of outer face of thickened section. Several snapped mussel-byssus threads on shell from when Nucella moved in time to escape ensnarement.