1. Left valve of extremely large live-taken C. edule specimen; 75.0mm long, intervalve-width 49.6mm, shell mass 68g. Ribs broad with wave-shape scale-spines. Narrow groove between ribs. Early growth lines eroded, later ones crowded, >10 yrs? Orkney.
2. Left valve of extremely large live-taken C. edule specimen; 75.0mm long, intervalve-width 49.6mm, shell mass 68g. Ribs broad with wave-shape scale-spines. Narrow groove between ribs. Early growth lines eroded, later ones crowded, >10 yrs? Orkney.

Left valve of extremely large live-taken C. edule specimen; 75.0mm long, intervalve-width 49.6mm, shell mass 68g. Ribs broad with wave-shape scale-spines. Narrow groove between ribs. Early growth lines eroded, later ones crowded, >10 yrs? Orkney.