Phillips, Prof., “On the Geology of the Malvern and Abberley Hills.” Memoirs of the Geological Survey, Vol. ii., 1848. Holl, Dr. H. B., “On the Geology and Structure of the Malvern Hills.” Quart. Journal Geol. Soc., Vol. xxi., p. 72. Callaway, Dr. C., “On a second Pre-Cambrian Group in the Malvern Hills.” Q. J. G. S., 1880, Nov. 1880. Prof. T. G. Bonney, LL.D., and Rev. W. Hill, M.A. “On the Pre-Carboniferous Rocks of Charnwood Forest.” Q. J. G. S., 1877, p. 754, &c. Allport. S., “Ancient Devitrified Pitchstones and Perlites from Lower Silurian District of Shropshire.” Quart. Journ. Geol. Soc., 1877, p. 439. Callaway, Dr. Chas., “The Pre-Cambrian Rocks of Shropshire.” Quart. Jour. Geol. Soc. 1879, p. 643; ibid, 1882, p. 120. _Cambrian Formations._ Prof. Phillips, “Geology of Malvern and Abberley Hills.” See above. Holl, Dr. H., “Geology and Structure of the Malvern Hills.” See above. Callaway, Dr. C., “On a new Area of Upper Cambrian Rocks in South Shropshire.” Q. J. G. S., 1877. p. 652. T. S. Houghton., M.A., F.G.S. “Note on the Age of the Quartzite of the Lickey.” Proceedings Birmingham Philosophical Society, 1881-2, p. 206. Prof. C. Lapworth, “On the Discovery of Cambrian Rocks in the neighbourhood of Birmingham;” ibid, p. 234. See also Geological Magazine, 1882, p. 563; ibid, July, 1886. W. Jerome Harrison, F.G.S., “On the Pre-Carboniferous Floor of the Midlands.” Midland Naturalist, 1855, p. 38. _Silurian Rocks._ Sir R. J. Murchison, “Silurian System,” p. 408, and 480. J. Beete Jukes, F.R.S. “The Geology of the South Staffordshire Coalfield.” 2nd Ed., p. 145 et seq. _Carboniferous Rocks._ Sir R. J. Murchison, “Silurian System,” p. 463. J. Beete Jukes, F.R.S. “The Geology of the South Staffordshire Coalfields.” 2nd Edition; see also Jukes, “On the Geological Structure of South Staffordshire Coalfield.” Birmingham and Midland and Hardware District, 1866, p. 1. Howell, H., F.G.S., &c. “The Geology of the Warwickshire Coalfield.” Mem. Geol. Survey, 1859. _Permian and Triassic Rocks._ Hull, Prof., M.A., F.R.S. “Triassic and Permian Rocks of the Midlands.” Memoirs Geol. Survey. Sir And. Ramsay, F.R.S., “On the occurrence of Angular boulders in the Permian Breccia of Shropshire and Worcestershire.” Quart. Jour. Geol. Soc., 1855, p. 185. Rev. P. B. Brodie, “Upper Keuper Sandstone of Warwickshire.” Journ. Geol. Soc., Vol. xii., p. 374. Prof. L. C. Miall, “Labyrinthodonts from the Keuper Sandstone, in the Warwick Museum.” Journ. Geol. Soc., Vol. xxx., p. 417. W. J. Harrison, “On the Quartzite Pebbles contained in the Triassic Strata of England, and on their Derivation from an Ancient Land Barrier in Central England.” Proc. Birmingham Phil. Soc., Vol. iii., p. 157. Prof. T. G. Bonney, “On the Pebbles in the Bunter Beds.” Geol. Mag. for 1880, p. 404. Thos. Davidson, “Brachiopoda of the Budleigh-Salterton Pebble Bed.” Q. J. G. S., Vol. xxvi., p. 70. 1870. _Liassic and Rhætic Rocks._