388* Dr. FiTTON on the Strata below the Chalk. 



SUMMARY AND GENERAL REMARKS, (163.)— (173.), pp. 318—334. 



General or abstract Section, PI. X. b. fig. 13. ; Thickness of strata, (163.), pp. 318 — 320. 



Order of Geological events, (164,), p. 320. 



Local distribution of strata in the South-east of England, (165.), p. 321. 



Chalk; Upper green-sand, ^.322.; Gault ; Lower green-sand; Wealden; pp. 323, 324. ; 

 Authorities on freshwater beds below the chalk, p. 324, note. 



Theory of the Wealden, (166.), p. 324. ; Lakes of North America, p. 325. 



Wealden in other districts, (167.), pp.326 — 328; Scotland, p. 326. ; Lower Boulonnois; 

 p. 326.; Pays de Bray, p. 326— 328. 



Marine deposits coeval with the Wealden ; probable a priori, (168.), p. 328. ; results connected 

 with their deposition, p. 329. ; places of the occurrence of such deposits, p. 329, 330. ; 

 Isle of Bornholm, Helsingburg, pp. 329, 330. ; may be expected, probably, in central 

 France, p. 330. ; Portland-sand to be distinguished, p. 331. 



Beds below the Wealden ; intimately connected, (169.), p. 331. ; remarks upon them, p. 331. 



Composition of strata, (170.), p. 332. : formation of stone amidst loose materials; — of sili- 

 ceous petrifactions amidst calcareous matter, p. 23^Z. ; petrified shells, sometimes sili- 

 ceous, p, 332. ; Oolite in Oxfordshire, with freshwater shells, p. 333. ; pisolitic iron 

 ore in the Hastings-sands of England, p. S33. 



Similarity of deposits of different epochs (\7 1.), p. 333. ; — of Portland beds to Chalk; of 

 Portland-sand to Green-sands ; of Wealden to the red and variegated marl of the New 

 red-sandstone, and of beds above the chalk, and to the coal formations, p. 333. 



Fossils, (173.), p. 334. ; systematic list referred to ; too defective to justify general infer- 

 ences, p. 334. Acknowledgement of Mr. Lonsdale's assistance ; Conclusion: p. 334. 



APPENDIX. 



A. — Descriptive notes respecting the shells figured in Plates XL to XXIIL, by James de Carlk 



SowERBY, F.L.S., &c. : pp. 335—348. 

 A*. — Figures of Vegetable Remains; Sphenopteris gracilis; (Wood-cut, p. 181.). Endogenites 

 erosa ; Plates XIX. and XX., p. 349. Fossil Cones from the Wealden, Plate XXI. figg. 9, 

 10, and 11 ; Cone approaching to an Araucaria, p. 349. 

 B. — Systematic and Strati graphical List of Fossils, pp. 350 — 368. 



Explanation of references, p. 350. Tables of Fossils, pp. 351 — 368. 

 C.—List of Heights, pp. 369—381*. 



Explanation, and authorities, p. 369 — 371. List, pp.371 — 381*. Railroad Sections, 

 375—381*. 

 D. — Additions and corrections ; p. 382*, 383*. 



Coast west of Hastings, 382* : Bones of Birds in the Wealden, 382*: Supposed Wealden 

 in Northamptonshire, 383* : Supposed chalk in Rutlandshire, 383* : Inoceramus in- 

 ter medius, 383*. 



