29 Tectura virginea. Strangford Lough, Northern Ireland. © Julia Sigwart.

29 Tectura virginea. Strangford Lough, Northern Ireland. © Julia Sigwart.

1: white “repugnatory” glands being pressed by forceps.
2: pressed gland emitting secretion of viscid, slow-to disperse, white threads. Fretter and Graham (1962) assumed secretion was toxic and/or distasteful, but its precise nature is yet to be established.

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