Pupal case - top of tube - highly enlarged

Kuvaus:

Longitude (deg): -3.1. Latitude (deg): 51.9. Longitude (deg/min): 3° 10' W. Latitude (deg/min): 51° 60' N. Vice county name: Brecon. Vice county no.: 42. Country: Wales. Stage: Pupa. Identified by: Ian Wallace. Comment: "Pupal case, attached to rock, in stream". Category: macro-photograph. Image scaling: highly enlarged. Photographic equipment used: Nikon D100 dSLR with Tamron SP T90 AF Macro 1:1 lens.