Dr Fleming began by stating, that a paper of his, “On the Neptunian formation of Siliceous Stalactites,” was read before the Society, March 7, 1825, and published in “Brewster's Journal of Science,” for April of the same year, p. 307. To this paper Dr Hibbert has referred, in his description of the “Limestone of Burdiehouse,” Edin. Phil. Trans., vol. xiii., p. 280, but has misrepresented, in an unaccountable manner, the facts which had been stated. Dr Fleming, expressly said, in describing a limestone containing the remains of dicotyledonous plants, and consisting of flinty and calcareous layers, that it “dips under the great bed of limestone belonging to the coal formation which extends north towards Linlithgow,” which “encloses the remains of those marine animals which are common in the limestones of the coal formation.”