63 Patella pellucida. Shell length 11.9mm. Growth Stage 5 (GS5h). September 2014. North Yorkshire, England.

The mantle-skirt is white (1), but, as it is translucent, the white is often tinted by the brown (2) of underlying shell when viewed ventrally. If the angle of light incidence is right, as in this case, the blue iridescence (3) of the shell interior colours the mantle. Underlying colour shows especially clearly through the efferent pallial vessel (4) which, with the blood within, is almost colourless transparent.

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.

Imprint

Photographic guide to the identification and biology of European marine invertebrates

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