^{page 400 note 1} I should mention that my observations were made in 1868 and 1869 when engaged with my colleagues, Messrs. W. A. E. Ussher and J. H. Blake, in resurveying the Mendip Hills, under the superintendence of Mr. H. W. Bristow, F.R.S.

^{page 401 note 1} Mr.Sanders, , F.R.S., has collected a series of fossils from these beds, which he has placed in the Museum at Bristol. They have also been briefly alluded to by Mr. C. Moore, Quart. Journ. Geol. Soc., vol. xxiii., p. 492,Google Scholar and Mr. E. B. Tawney, ibid., vol. xxii., p. 79. Lists will be published in the official explanation which will accompany the new edition of Sheet 19 of the Geological Survey Map.

^{page 401 note 2} Trans. Geol. Society, second series, vol. i. p. 364.Google Scholar

^{page 401 note 3} Geology of England and Wales, p. 304.Google Scholar

^{page 401 note 4} Trans. Geol. Society, second series, vol. i. p. 294.Google Scholar

^{page 401 note 5} The former were alluded to by De la Beche, Mem. Geol. Survey, vol. i. p. 277.Google Scholar

^{page 402 note 1} New (second) edition, 1862, p. 166.Google Scholar

^{page 403 note 1} Report on the Geology of Londonderry, etc., pp. 97, 98, 140, 150, etc.Google Scholar

^{page 403 note 2} Mem. Geol. Survey, Vol. i. p. 254.Google Scholar

^{page 403 note 3} This is given as Matter insoluble in Hydrochloric acid.

^{page 403 note 4} These are Carbonates.

^{page 403 note 5} Save one of the Lower Lias of Downside, near Shepton Mallet, the equivalent of the Sutton Stone.—Ibid., p. 276.

^{page 403 note 6} Bocks Classified and Described. Edited by Lawrence, P. H.. p. 350.Google Scholar

^{page 403 note 7} Quart. Journ. Geol. Soc., vol. xxiii., p. 451.Google Scholar

^{page 404 note 1} Proc. Geol. Soc., vol. iv. p. 293.Google Scholar

^{page 404 note 2} I have an impression that it was rather siliceous. But Dana observes that in the metamorphism of limestone the carbonic acid is not given out if the material is under heavy pressure.—Manual of Geology, 1863, p. 705.

^{page 404 note 3} Rep. Brit. Assoc., 1846. Trans. of Sections, p. 60.Google Scholar

^{page 404 note 4} Quart. Journ. Geol. Soc., vol. xxiii., p. 449.Google Scholar

^{page 405 note 1} Mem. Geol. Survey, vol. i., p.297.Google Scholar

^{page 405 note 2} American Journal of Science, vol. xlv.Google Scholar

^{page 405 note 3} A great many valuable facts relating to metamorphism have been brought together in a paper by Dr.Bigsby, J. J., Edin. New Phil. Journ., new series, 04, 1863.Google Scholar