Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Fossil mammals and birds have been found at many localities in Britain, and there is a long history of collection and study, dating back to the earliest days of palaeontology. This volume of the GCR Series contains a description of around 30 representative sites, selected for the Mesozoic-Tertiary part of the history of these vertebrates.