The Principles of Stratigraphical GeologyNote 17 — J. E. MARR, M.A., F.R.S. (continued 2)Reading editionBonney, T. G., Quart. Journ. Geol. Soc., vol. XLII. Proc. p. 65.◇Copy noteReturn to J. E. MARR, M.A., F.R.S. (continued 2)