96 THE ESSEX NATURALIST A. High Road Section. (Hinton, 1900, p. 273). A.O.D. Thickness Lithology 44' 42' 40' 39' 35' 34' 31' 26' 1-4' 'Trail'. 1-4' Sandy loam, more argillaceous in places. 9"-T Shell bed, inconstant, containing numer- ous shells, also bones of Bos primigenius. 4' Sandy loam. 6"-l' Shell bed, resting on the eroded surface of the bed below. 1-5' Buff-coloured loam and marl, with race ; somewhat sandy (Bone-bed). 5' White sand with a few shells. B. Uphall Pit Section. (Dawkins, 1867, pp. 92-3; Phillips, 1871, pp. 470-1). A.O.D. Thickness Lithology 30' 3' Soil. 27' 20' 7' Contorted gravel and brickearth with race = 'Trail' or 'Uncallow'. The pebbles in this deposit have their long axes vertical. 5' Sandy loam with shells, race and bones. The famous Ilford "Elephas primi- genius" skull was found in this horizon. 6' Yellow-white 'waved' sands, with shells and bones in upper part (Corbicula sands). The "Rhinoceros leptorhinus" skull horizon. 15'