10 Coryphella gracilis

10 Coryphella gracilis

1: granular digestive gland.
2: notal ridge containing vessel carrying digestive gland to bases of cerata.
3: fragmented, narrow, opaque white, subapical ring.
4: transparent, colourless apical c. 15% of ceras contains an oval, white cnidosac
Left: Menai Strait. Right: Lewis, Scotland. Leg. D. McKay & S. Taylor.

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