EXPLANATION OF THE PLATES. 



Plate X. a. 



Contains a series of sections, at right angles to the range of the chalk, on the lines 

 marked in the map, PI. IX., Nos. 1. to 25. The series begins on the coast north of 

 Folkstone, and follows the outcrop of the chalk, round the Weald denudation of Kent 

 and Surrey, &c. ; thence along the coast, to Devonshire ; and in the interior, from 

 the Blackdown Hills to Norfolk. These sections are all drawn to the scale of the 

 Ordnance maps, one inch to a mile. The heights are of necessity much exaggerated ; 

 but additional lines are given below Nos. 6. and 7. in the true proportion of height 

 and distance. 



No. 1. Section from Folkstone Hill to Copt Point, Kent : p. 104.— (See the Map, PI. VII. 

 fig. 1. ; and Sectional Sketch; PI. X. b. fig. 1.). 



^0.2. Through Tilburstow Hill and Godstojie, Surrey: p. 137. — (See the Map, PI. VII. 

 fig. 2.) 



2^0.3. Through Nuffield and Merst/iam, Surrey: p. 137— 141.— (See the Map, PI. VII. 

 fig. 2.) 



No. 4. From Hindhead, Surrey, through Tucksbury Hill, near Farnham : p. 144 — 149. 



No. 5. Section across the Wealds, from the South Downs at Dimcton- Beacon, through 

 Floxham Park, Plaistow, and Aldfold, to the North Downs at Netley Heath ; 

 principally from Mr. Martin's MSS.: p. 155—160. 



No. 6. The Coast of Sussex and Kent, from Beachy Head to Folkstone Hill;— part of 

 which is given in greater detail in PI. X. b. fig. 3. The lower line of this figui'e re- 

 presents the cliffs on the true relative scale of height and horizontal extent: p. 161 

 —164. 



No. 7. Part of the South Coast of the Isle of Wight ; from Af ton-Down to Rocken-End, 

 and from Dunnose to Bembridge Down: — (See also the transverse Section PI. X. b. 

 fig. 4.). In the lower line of this figure, the heights are in the true proportion to 

 the horizontal distances. — p. 182 — 202. 



No. 8. From Durlstone Head, through Swanage, to Ballard Down, Dorsetshire : p. 206 

 —215. 



No. 9. From Broadbench, in Kimmeridge Bay, Isle of Purbeck, to the Chalk-hills: p. 206 

 —215.— (See PI. X. b. figs. 5. and 6.). 



No. 10. Section at Lulworth Cove, Dorsetshire : p. 215— 216.— (See PI. X. b. fig. 7.) 



No.lO'. Section at Man of War Cove, west of Lulworth, Dorsetshire: p. 215— 217. — 

 (SeePl.X.b. fig. 8.) 



No. 11. Coast near Bere, Devonshire : p. 234. — (See PI. X. b. fig. 9.). 



No. 12. Blackdown Hill, Devonshire: p. 238. 



No. 13. Sections of the Vale of Wardour, in South Wiltshire: p. 245 — 255. — (See the 

 Map, PI. VII. fig. 3.). 



on the anticlinal line, A. B. 



on the transverse line, C. D. 



on the transverse line, E. F. 



on the transverse line, G, H. 



No. 14. Vale of Warminster J South Wilts : p. 257» 



