Umbonal rugae - close-up - highly enlarged

Description :

Longitude (deg): -1.1. Latitude (deg): 51.4. Longitude (deg/min): 1° 10' W. Latitude (deg/min): 51° 30' N. Vice county name: Berks. Vice county no.: 22. Country: England. Stage: Dead shell. Identified by: Malcolm Storey. Comment: Dead shells found beside fishing lake. Shows: left shell on left. Category: macro-photograph. Image scaling: highly enlarged. Photographic equipment used: Canon EOS10D dSLR and Macro MP-E 65mm x1 to x5 macro lens.