Hollow and light
This is part of one of the extended finger bones which formed the wing of a pterosaur (flying reptile). Pterosaurs are amongst the rarest of fossils because their bones were hollow and light in order to fly. That made them very unlikely to sink and become fossilised. This specimen was part of the Philpot Sisters’ collection which later went to Oxford Museum, before being donated to Lyme Regis Museum.
Find out more on the reptiles page.