"A piece of brontosaurus"

Chatwin's mother uses the now obsolete name for the Apatosaurus dinosaur of the Jurassic period.

The brontosaurus 'hoax' was revealed in 1903 when scientists discovered that the remains found in 1874 by O.C.Marsh, and thought to be of a previously unknown species, were in fact from the Apatosaurus, which had already been discovered. However,  the brontosaurus was not officially removed from paleontology classifications until 1974.