1. Cerastoderma edule. Right valves of extremely large Orkney specimen, 75.0mm long, and marketable Cheshire specimen, 23.9mm long. Small specimen raised above plane of larger shell’s outline to put in focus, so its apparent size relatively increased.
2. Cerastoderma edule. Right valves of extremely large Orkney specimen, 75.0mm long, and marketable Cheshire specimen, 23.9mm long. Small specimen raised above plane of larger shell’s outline to put in focus, so its apparent size relatively increased.

Cerastoderma edule. Right valves of extremely large Orkney specimen, 75.0mm long, and marketable Cheshire specimen, 23.9mm long. Small specimen raised above plane of larger shell’s outline to put in focus, so its apparent size relatively increased.