Head and tail spine - magnified

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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: Adult (live). Identified by: Malcolm Storey. Comment: In flooded footpath. Category: drawing. Image scaling: magnified. Photographic equipment used: "Camera Lucida drawings scanned with HP Scanjet 5470c flatbed scanner. Most of these were named at the time, but many (most?) names have now changed due to advances in knowledge (or occasionally mistakes on my part).".