02 Margarites helicinus. Height 4.1mm, diameter 5.2 mm. Orkney, Scotland. May 2017. Leg. S.Taylor.

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02 Margarites helicinus. Height 4.1mm, diameter 5.2 mm. Orkney, Scotland. May 2017. Leg. S.Taylor.

Base of shell.
1: live in water. 2: vacant in water. 3: vacant dry.
4: shell-walls thin and fragile, lip damaged.
5: narrow, deep, oval umbilicus.
6: iridescent nacre on underlying horn/orange layer. Iridescence strongest in water.

Imprint

Photographic guide to the identification and biology of European marine invertebrates

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