51 Patella ulyssiponensis. Shell length 39.5mm. Interior of shell, backlit on right; thinnest/brightest on horseshoe-shaped pedal-retractor muscle scar. Lleyn, Wales. October 2015. Leg. S. Payne.

51 Patella ulyssiponensis. Shell length 39.5mm. Interior of shell, backlit on right; thinnest/brightest on horseshoe-shaped pedal-retractor muscle scar. Lleyn, Wales. October 2015. Leg. S. Payne.

Nucella lapillus bores through the shell, usually to the pedal-retractor muscle where the adjacent viscera are accessible obliquely to its radula without having to bore through the thick amphora shell-layers covering the viscera. Boring takes several days, but is rewarded with a large food supply.

OTHER SPECIES ALBUMS
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