PALSLIDES_ED is the BGS Edinburgh Palaeontological Slides Collection. It comprises two registration series. The MIC (microfossils) series, which is added to sporadically, includes c.950 individually registered slides (each with up to 100 cells) of microfossils (mainly foraminifera and ostracods). The PS (Palaeontological thin Sections) registration series, which has not been added to since 1987, comprises 4202 fossil thin sections and mounted slides, and includes various donated collections. Both the MIC register (10 volumes) and PS register (2 volumes) record the locality of each slide and any previous registration numbers. Stratigraphic information may also be given. Taxonomic information is not complete. There is, at present, no separate index (either analogue or digital) to the dataset, but it is included in FOSSLOC4. GSE_SPECIMENS and SMITH_GSE include those slides and thin sections transferred to the Type and Stratigraphical Collection from the Survey and John Smith collections.