1: borehole of Nucella lapillus located above pedal-retractor muscle where viscera accessible obliquely to its radula without having to bore through thick amphora-shell-layers covering the viscera. Boring takes several days, but is rewarded with large food supply, providing Nucella is not dislodged before completion, as it was in this case.

2: red dot marks position on scar of pedal-retractor muscle where boring would have come through if Nucella had not been dislodged before completion.

OTHER SPECIES ALBUMS
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