11 Polycera quadrilineata

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11 Polycera quadrilineata

1: swelling over the pericardium.
2: fan of six gill plumes.
3: unipinnate gills.
4: inner face of gill-shaft brownish.
5: outer face of gill-shaft yellow.
6: dark shading on gill vanes.
7: anal papilla.
North Wales.

Imprint

Photographic guide to the identification and biology of European marine invertebrates

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