"The investigation of the neurocranium of a Pterodactylus elegans and a comparative review of the figures of other Pterodactylus skulls and of the yet undescribed endocranial casts furnish a complete picture of the Pterodactylus brain except the base. The comparisons of the Tithonian Pterodactylus brain with the Cretaceous pterodactyloid and the Liassic and Tithonian rhamphorhynchoid brains show that while the form and position of the nervous centers of the olfactory and optic senses and the position of the cerebellum are avian in everypterosaurian, bird-like form of cerebellum and forebrain are achieved only in the later forms of both suborders."