1 : black mantle within white U-shape of pedal-retractor muscle covers visceral hump and nuchal cavity.
2: pallial tentacles contracted on dead specimen.
3: three muscle-bundles of severed pedal-retractor muscle.
4: efferent pallial vessel in mantle skirt carries blood from gills.
5: faecal string, yellow from grazing on encrusting calcareous algae; in translucent intestine protruding from rupture in mantle.
6: anterior muscle-bundle on each side is largest and strongest as must firmly pull down shell further to anterior where bundles are absent.
7: pink head visible through ruptures in nuchal cavity.

OTHER SPECIES ALBUMS
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