150 THE ESSEX NATURALIST —. 1910h. "Arctic Plants from the Valley Gravels of the River Lea". Nature, 85, Dec. 15, 1910, p.206. First record of Ponders End stage, with Elephas primi- genius and Rhinoceros antiquitalis [—tichorhinus auctt.). 15. 1911a. "Excursion to Ponders End and Chingford", Proc. Geol. Assoc., 22, 166-171. (Also conducted London Nat. Hist. Soc, July 5, 1912). Plants, mollusca, mammalia recorded; Late Glacial and Holocene. —. 19116. Calcined flints from a hearth site, Debden Slade, Epping Forest; experiments in calcination and boiling with hot stones. Essex Naturalist, 16, 243. —. 1911c. Reef-life masses of Annelids from sea shore, Stone Point. Walton. Essex Naturalist, 16, 237. 16. 1911d. "On a Prehistoric Interment near Walton-on-Naze", with preliminary report on skeleton by A. Keith, Essex Natur- alist, 16, 198-208, 1 pl., 2 figs. See also 1911c, 1912d. Neolithic/Early Bronze Age. —. 1911c. In A. Keith, "Ancient Types of Man", Chap. 1 on Walton skeleton. —. 1911f. Mesolithic Flints, Epping Forest, Essex. Meeting of Essex Archaeological Society, Jan., 1911. —. 1911g. Essex Field Club visit to Clacton-on-Sea. Essex Naturalist, Sept. 30, 1911. Pleistocene mammalia; Clactonian artifacts. —. 1911h. Palaeolithic wooden spear from Clacton. Quart. Journ. Geol. Soc., 67, cxix. First record of the Clacton spear; see also 1914g; 1921c. 17. 1911i. "On the Correlation of the Prehistoric 'floor' at Hull- bridge with similar beds elsewhere", Essex Naturalist, 16, 265-282. First definition of "Lyonesse" surface (Neolithic/Early Bronze Age). —. 1912a. "Palaeolithic Man and His Art", (review of W. J. Sollas, Ancient Hunters), Man. 1912, 109. (Review of 2nd edition. Man, 1916, 50). 18. 1912b. "On a Late Glacial Stage in the Valley of the River Lea, subsequent to the epoch of River-Drift Man", with Reports on the organic remains by F. J. Lewis, H. N. Dixon, A. S. Kennard, and B. B. Woodward, C. O. Water- house, D. J. Scourfield. G. M. Davies, Quart. Journ. Geol. Soc, 68, 213-251, 3 pls., 1 fig. See also 1910ft ; 19136; 1914a; 1916a; 1923d; 1938b; 1949a. "Bison minor" later discounted (1939c). Cheshunt brick- earth mammalia, p.228.