68 Patella pellucida. Shell length 4.7mm. Growth Stages 3 (GS3). March 2017. Littoral. West Anglesey, Wales.

68 Patella pellucida. Shell length 4.7mm.  Growth Stages 3 (GS3). March 2017. Littoral. West Anglesey, Wales.

Along each side of the dorsal surface of the foot there is a lateral glandular streak with an overhanging upper lip. The lip has lobe-like retractile tentacles. The gland is out of sight in this image, but its tentacles project clearly (1) from the side of the foot.

Concise
Part 1, SHELL FORMS: 02 Patella pellucida. Growth Stage 2 (GS2). July 2012. Littoral. North Yorkshire, England. © P. Lightfoot.
Part 2, BODY & ANATOMY: 03 Patella pellucida. Growth Stage 3 (GS3). 2009. Sublittoral, Farne Islands, Northumberland, England. © P.Lightfoot.
Part, 3 HABITS & ECOLOGY: 04 Patella pellucida. Length 4.6mm. Growth Stage 3 (GS3). September 2016. Yorkshire, England. © P.Lightfoot.