26 Patella depressa. Shell-length 27mm. Mantle folded back from nuchal cavity. Lleyn, Wales. September 2015.

26 Patella depressa. Shell-length 27mm. Mantle folded back from nuchal cavity. Lleyn, Wales. September 2015.

1: translucent mantle-skirt.
2: skirt and mantle-roof of nuchal-cavity folded back at anterior-mantle attachment.
3: pallial tentacles pigmented chalky-white.
4: efferent pallial vessel taking blood from mantle to heart.
5: pallial gills attached to ventral surface of mantle skirt.
6: pallial gills visible through translucent mantle skirt.
7: course of radula between pair of purple-pink cartilage bolsters of odontophore; visible through translucent epithelium of head.
8: bundles in horseshoe-shaped pedal-retractor muscle.

OTHER SPECIES ALBUMS
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