07 Patella vulgata

07 Patella vulgata

Exterior of shell with strong and prominent concentric growth lines (1) and radiating ribs (2) with small nodules where they cross (3). L. 35 mm, Anglesey, March 2014. Right: Strong growth lines and ribs.  L. 14.9 mm. H/L 38%. Apex 36% of L. from anterior. Yorkshire, England, September 2014.