Wednesday, 2nd February, 1831. Present, Professor SEDGWICK, President, in the Chair. Robert Trotter Esq. was elected a Fellow of this Society. The Paper entitled "Supplementary Observations on the Structure of the Austrian and Bavarian Alps," by Roderick Impey Murchison, Esq. Sec. G.S., F.R.S. &c. and begun at last Meeting; was concluded. Among the donations exhibited was a Geological Map of Styria, executed under the superintendence of John' Archduke of Ans. tria, and presented by his Imperial Highness to the Society.