[267]In the coast-map at [p. 148], the principal beds are marked, so that, I trust, there will be no difficulty in finding them.

[268]For the direction of the river from east to west, see a paper “On the Discovery of an Alligator and several New Mammalia in Hordwell Cliff,” by Searles Wood, F.G.S.: London Geological Journal, No. 1., pp. 6, 7.

[269]“The Freshwater Strata of Hordwell Cliff, Beacon Cliff, and Barton Cliff:” Transactions of the Geological Society, second series, vol. ii., p. 287.

[270]“Stratigraphical Account of the Section of Hordwell, Beckton, and Barton Cliffs:” The Annals and Magazine of Natural History, June, 1851. In making these measurements I was very greatly assisted by the Rev. W. Fox, who was most untiring to ensure accuracy.

[271]See the Geological Journal, vol. iv., p. 17; as also, Professor Owen’s Monograph on “The Fossil Reptilia of the London Clay,” published by the Palæontographical Society, 1850, p. 48.

[272]Some of the most characteristic shells in this bed may perhaps be mentioned:—

Pleurotoma exorta. Sol. Terebellum fusiforme. Lam. Murex minax. Sol. Murex asper. Sol. Murex bispinosus. Sow. Typhis pungens. Sol. Voluta ambigua. Sol. Voluta costata. Sol. Voluta luctatrix. Sol. Dentalium striatum. Sow. Scalaria reticulata. Sow. Scalaria semicostata. Sow. Littorina sulcata. Pilk. Solarium plicatum. Lam. Hipponyx squamiformis. Lam. Fusus porrectus. Sol. Fusus errans. Sol. Fusus longævus. Lam. Bulla constricta. Sow. Bulla elliptica. Desh.

I scarcely need, I hope, refer the reader either to Mr. Edwards’ Monograph on the Eocene Mollusca, 1849, 1852, 1854, 1856, or to Mr. Searles Wood’s Monograph on the same subject, both in course of publication by the Palæontographical Society. There is an excellent table of the Barton shells, by Mr. Prestwich, in the Geological Journal, vol. xiii. pp. 118-126.

[273]For the High Cliff Beds, see Mr. Fisher’s paper on the Bracklesham Sands of the Isle of Wight Basin, in the Proceedings of the Geological Society, May, 1862, pp. 86-91, whose divisions are here followed.

[274]All these beds are shown in the large map by the word “Fossils,” there not being space enough to particularize each bed.