66 LIST OF WORKS ON THE GEOLOGY, ETC., OF ESSEX. from Two Sections in the Brickfield, Copford, Essex...... Mag. Nat. Hist., vol. ix, p. 429. (46) Mitchell, Dr. J. On the Beds immediately above the Chalk in the Counties near London. Phil. Mag., ser. 3, vol. ix, p. 356. (47) Morris, [Prof.] J. On a Freshwater Deposit containing Mammalian Remains, recently discovered at Grays, Essex. Mag. Nat. Hist., vol. ix, p. 261. 1837. (48) Brown, J. Observations upon the Boulders of Trap Rocks, &c., which occur in the Diluvium of Essex. Mag. Nat. Hist., ser. 2, vol i, p. 145. (49) Mitchell, Dr. J. Observations on the Cliffs in the Neigh- bourhood of Harwich. Trans. Geol. Soc, ser. 2, vol. v, p. 259. 1838. (50) Brown, J. Discovery of a large pair of fossil horns in Essex [Clacton]. Mag. Nat. Hist., ser. 2, vol. ii, p. 163. (51) Clarke, Rev. W. B. Note on the Crag Beds of Suffolk and Essex. Mag. Nat. Hist., ser. 2, vol. ii, p. 162. (52) Mitchell, Dr. J. On the Drift from the Chalk, and the Strata below the Chalk in the counties of Norfolk, Suffolk, Essex, .... &c. Proc. Geol. Soc, vol. iii, no. 59, p. 3. (53) Morris, [Prof.] J. On the Deposits containing Carnivora, and other Mammalia in the Valley of the Thames. Mag. Nat. Hist., ser. 2, vol. ii, p. 539. (54) Sowerby, G. B. Comparison of Cyrena, Valvata, and Unio, found at Grays, with recent species. Mag. Nat. Hist., ser. 2, vol. ii, p. 546. 1839. (55) Charlesworth, E. Illustrated Zoological Notices, 2. On a Tooth of the Genus Otodus, Agassiz, from the London Clay (Wal- ton, Essex). Mag. Nat. Hist., ser. 2, vol. iii, p. 351. (56) Mitchell, Dr. J. On the Wells found [formed] by digging and boring in the gravel and London Clay in Essex, and on the geological phenomena disclosed by them. Proc Geol. Soc, vol. iii, no. 64, p. 131.