( j eological Society, 105 



and Planorbis, associated with marine shells. How far this distinction 

 may be owing to the action of a river, Mr. Morris says it may be difficult 

 to determine, as the recent species of the above genera have variable 

 habits. The principal localities at which the Woolwich beds have 

 been noticed are, Sundridge park near Bromley, Chiselhurst, Orping- 

 ton, Beckenham, Sydenham, Counter Hill, Loam-pit hill near Lewis- 

 ham, the Thames Tunnel, Vauxhall, the road leading from Oldfield to 

 Plumstead; the ninth milestone beyond Shooter's Hill, Erith ballast- 

 pit, Bexley Heath, Swanscombe Wood, Green Street near Stoke, and 

 Upnor near Rochester. , 



The following sections presented at the last locality, illustrate the 

 variations in different parts of the same pit. 



Feot. 

 South End, Top, brown clay with fragments of chalk and 



chalk flints 10 



fine calcareous clay 3 



sand with bluish flint pebbles, and numerous re- 

 mains of Cyrena, Cerithium, Planorbis, Cy- 



therea, Pectunculus Cardium,and Natica. . I 



white sand, with occasionally layers of shells. ... 4 

 blue and brown clay with compressed Cyrena, 



Cerithium and Ostrea 4 



lignite in gray sand 1 



white sand, lower part containing pebbles 20 



North End, Top, brown clay, &c 14 



sand with pebbles and shells 1$ 



sand chiefly white, in the upper part thin seams 



of shells 15 



brown and blue clay, with compressed shells 



intermingled with sand 6 



uirplish sandy clay with ochreous concretions . . 2 



lignite in sulphur-coloured clay and sand.. ..... . 8 inches. 



white sand 



With respect to the geological position of the Woolwich beds, 

 Mr. Morris is of opinion that they ought to be assigned to the lower 

 part of the London clay, as they occupy the same position, with re- 

 ference to the chalk, as the Bognor strata. 



3. The Bognor or lower arenaceous beds of the London clay are 

 then described, and the following list given of the localities at which 

 they have been noticed : Pegwell Bay (Isle of Thanet): Heme Bay*, 

 Faversham, Hampstead well f, Watford, Egham, Bray, BinfieldJ, 

 Catsgrove quarry near Reading§, Alum Bay, Bognor^f and Stubbing- 

 ton. At all these localities the strata are considered by Mr. Morris 

 to be contemporaneous and to belong to the lower part of the London 



* See Abstract of Mr. Richardson's Memoir, Geol. Proceedings, vol. ii. 

 p. 78. or L. and E. Phil. Mag. vol. v. p. 21 9. 



f Abstract of Mr. Wetherell's Memoir, Geol. Proceedings, vol. ii. p. 93, 

 or L. and E. Phil. Mag. vol. v. p. 295. 



X Mr. Warburton's Memoir, Geol. Trans., Second Series, vol. i. p. 52. 



* Abstract of Mr. Rofe's paper, Geol. Proceedings, vol. ii. p. 72, or L. 

 and E. Phil. Mag. vol. v. p. 212. 



H Mr. Webster's paper, Geol. Trans., First Series, vol. ii. p. 190. 

 Third Series. Vol. 1 1. No. 65. Supplement, July 1837. P 



in 



