Abstract
An inventory of Richard Fraser Bastow's diatom type slides is given along with a biographical sketch and full bibliography. Details of the whereabouts of Bastow's type slides are included along with geographical details and nomenclatural notes. Light microscope images are provided for all lectotypified taxa. Bastow's collections were primarily made in Britain and he was involved in an abortive attempt to write a British diatom flora. Some background to this project is provided.