This is a ichthyosaur skull from the collection of V.H.W Wingrave, the original curator of Lyme Regis Museum. It was prepared in 1979 using acetic acid, and shows much fine detail including the temporal fenestrae. These are the large holes at the back of the skull into which muscles were attached to work the jaws. Lower down, the right eye socket is visible (on the left side as we look at it).
Find out more on the reptiles pages.