^{page 348 note 1} Oebbeke, Beiträge zur Petrographie der Philipinen und der Palan-Inseln, Neues Jahrbueh, I. Beilage Band, p. 451.

^{page 348 note 2} That portion of this isthmus, situated between Coalbrookdale and the Clee Hills, was sixteen miles wide at the termination of the deposition of the Carboniferous Limestone, and was reduced to twelve miles during that of the Millstone Grit.

^{page 348 note 3} Memoirs of the Geological Survey, The South Staffordshire Coal-field; by J. Beete Jukes, F.R.S., p. xii. See also Jukes's Manual of Geology, second edition, p. 518.

^{page 348 note 4} Professor J. Phillips recognized that “they were confined to valleys in the slate formation, and never follow that rock to its escarpments on high ground.”—Geology of Yorkshire, part ii., p. 13.

^{page 348 note 5} Mem. Geol. Survey, Geology of Kendal, etc., W. T. Aveline, F.G.S., p. 14; [Prof.] T. McK. Hughes, F.S.A., p. 15; of Kirkby Lonsdale [Prof.] Hughes, p. 16. On the Carboniferous Conglomerates of the Basin of the Eden, by J. G. Goodchild, Quart. Journ. Geol. Soc. vol. xxx. p. 396.

^{page 349 note 1} The Double Delta of the Whang-Ho, by Samuel Mossman, Geographical Magazine, vol. v. p. 92.

^{page 349 note 2} Geological Survey, Vertical Sections, No. 23.

^{page 349 note 3} The Carboniferous Limestone and Cefn-y-fedw Sandstone between Llanymynech and Minera, by G. H. Morton, F.G.S., p. 122.

^{page 349 note 4} Morton op. cit., p. 81.

^{page 349 note 5} Morton, op. cit. pp. 39 and 75.

^{page 350 note 1} Mem. Geol. Survey, North Derbyshire, p. 18.

^{page 350 note 2} Geology of Yorkshire, by John Phillips, F.R.S., part ii. p. 176.

^{page 350 note 3} Geological Survey, Vertical Sections, No. 23.

^{page 350 note 4} Under the local definition of Cefn-y-Fedw Sandstone, op. cit. p. 51.

^{page 350 note 5} Fig. 37, Comparative Sections of thethe Millstone Grit and Yoredale Rocks, Mem. Geol. Survey, North Derbyshire, p. 139.

^{page 351 note 1} Geological Survey, Vertical Sections, No. 23.

^{page 351 note 2} The Coalfields of Great Britain, by Edward Hull, F.G.S., second edition, p. 96.

^{page 351 note 3} Hull, op. cit. p. 99.

^{page 351 note 4} Hull, op. cit. p. 123.

^{page 351 note 5} Quart. Journ. Geol. Soc. vol. xxiv. p. 322.Google Scholar

^{page 351 note 6} Hull, Coal-fields of Great Britain, p. 123.

^{page 352 note 1} Geological Survey, Vertical Sections, No. 61.

^{page 352 note 2} Memoirs of the Geological Survey, The South Staffordshire Coal-field, by J. Beete Jukes, F.E.S., p. 25, etc.

^{page 353 note 1} Memoirs of the Geological Survey, vol. i. plates 4 and 5, vol. iii. plate 28. Referred to by Fisher, op. cit. p. 222.Google Scholar

^{page 353 note 2} The Geological History of the Colorado Eiver, Nature, vol. xix. 1879, p. 251.Google Scholar

^{page 353 note 3} Memoirs of the Geological Survey, North Derbyshire, p. 2.

^{page 354 note 1} On a group of Slate Rocks, between the Rivers Lime and Wharfe, by John Phillips, F.G.S., Trans. Geol. Soc. second series, vol. iii. pp. 10 and 13.Google Scholar

^{page 354 note 2} Memoirs of the Geological Survey, The Malvern Hills, etc., by John Phillips, F.E.S., vol. ii. part 1, p. 66.Google Scholar

^{page 354 note 3} Haffield Conglomerate of Phillips.

^{page 355 note 1} Recent Elevation of the Earth's Surface in the Northern Circumpolar Region, by Henry H. Howorth, Arctic Manual, 1875, Reprinted from the Journal of the Royal Geographical Society, vol. xliii. 1873.Google Scholar

^{page 355 note 2} The Times, 01. 14, 1880.Google Scholar

^{page 355 note 3} President's Address to Section C, at Sheffield, by Professor P. Martin Duncan, F.R.S., British Association Report, 1879, p. 330.Google Scholar