62 Patella pellucida. Left (not same scale as others): Shell length 8.3mm. GS4h. March 2017. W. Anglesey, Wales. Right: Shell length 10.2mm.GS4h. March 2014. W. Anglesey, Wales.

62 Patella pellucida.   Left (not same scale as others): Shell length 8.3mm. GS4h. March 2017. W. Anglesey, Wales. Right: Shell length 10.2mm.GS4h. March 2014. W. Anglesey, Wales.

The odontophore is separated from the outer lips by dull orange inner lips that open laterally and close to a vertical line.
Lips closed (1), partly open (2) and open (3).

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.