1. Cerastoderma edule. Shell length 22.9mm, height 21.7mm; marketable size in most areas of S. Britain. Slightly elongated circular outline. 24 ribs, bear many straight or slightly curved transverse scale-like spines. Mouth of Dee Estuary, Chesh. Oct. 2011
2. Cerastoderma edule. Shell length 22.9mm, height 21.7mm; marketable size in most areas of S. Britain. Slightly elongated circular outline. 24 ribs, bear many straight or slightly curved transverse scale-like spines. Mouth of Dee Estuary, Chesh. Oct. 2011

Cerastoderma edule. Shell length 22.9mm, height 21.7mm; marketable size in most areas of S. Britain. Slightly elongated circular outline. 24 ribs, bear many straight or slightly curved transverse scale-like spines. Mouth of Dee Estuary, Chesh. Oct. 2011