The Woodwardian Museum has for many years contained a fine series of Skiddaw Slatefossils.in1890 this was increased by the addition of many specimens obtained by themembers of Prof. Hughes' Long Vacation party, and immediately afterwards the University acquired, by donation, the valuable collection of the late Mr. Kiusey Dover. Prof. Nicholson has also presented a large number of Graptolites. When time permits, I hope to be able to describe our unrivalled collection of Skiddaw Slate fossils; mean-while, a few notes on the distribution of these organisms will throw such light on the development of the Skiddaw Slates as is required for the elucidation of the detailed structure of the district, a task which Mr. Harker and I shall attempt to perform ere long.