12 Tonicella marmorea

12 Tonicella marmorea

Dried specimen, in store 45 years. Length 15 mm (longer before girdle dried and shrank). Littoral. Orkney, Scotland. 1974.
Colour partly derives from pigment in properiostracum; brightest on live specimens in good condition and fades rapidly on specimens that are in poor condition or dead, as this specimen. Banded girdles are usual in Britain but Kaas and Belle (1985) state that the girdle is “of an even brownish colour, exceptionally with alternating zones of light and dark brown”. This may be the case in America, or their description may have been based on dried, dead specimens.

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