GODALMING; strata at Holloway Hill; Bargate-stone, (60.), p. 146.

FARNHAM to HINDHEAD; (61.), p. 147.; barren tract of sands, (62.), p. 147. ; structure and suc

cession of strata, (63.), p.148.; Weald-clay between Guildford and Godalming, (64.), p. 148.; Tucksbury Hill, beds above the chalk, fog level, Bagshot-sands, (65.), p. 148.; Drainage of this tract remarkable, (66.), p. 150.; assisting and maintaining causes of transverse drainage, (67.), p. 151.

FOSSILS of the Gault and Green-sands, in the interior of Kent, and part of Surrey, (68.), p. 152.

HAMPSHIRE and WESTERN SUSSEX, (69.)—(75.), p. 153.

Authorities, (69.), p. 153. ; gravel in Hampshire remote from chalk, (69.), p. 153.; springs, (70.), 154.; prominence of Upper green-sand, (71.), p. 154.

VICINITY OF PULBOROUGH; Section from South to North Downs, by Mr. Martin, Pl. X. a. No. 5., (72.), p. 155.; disturbances, (73.), p. 155.; earthquakes around Chichester, p. 155, note; junction of green-sands and Wealden at Stopham, (74.), p. 156. FOSSILS of the Green-sand and Gault of part of Hampshire and Western Sussex, (75.), p. 156. THE WEALDEN IN GENERAL, of Kent, Surrey, and Sussex, (76.)-(90.), p. 159.; acceptation of the term Wealden extended, (76.), p. 159.; Valley of the Wealds, (77.), p. 160.; beds of sand, sandrock, and limestone subordinate to the Weald-clay, (77.), p. 160. Wealden on the coast of Kent, from Hythe to Rye; Rev. G. E. Smith, (78.), p. 161.; the word "Hurst;" Rev. Joseph Hunter, p. 161, note.

Hastings-sand, (Pl. X. a. No. 6. ; X. b. fig. 3.); Mr. Webster, (79.), p. 167.; strata of the coast west of Hastings, (80.), (81.), p. 164. ; Sectional List and details, (82.) p. 165.; White-rock; fault, p. 166.; granular, or pisolitic oxide of iron, p. 166, and note; Sectional Lists, p. 167.; remarkable alternation of sand and clay, (83.), p. 168.; Beds at St. Leonard's, (84.), p. 168.; similar group near Tonbridge Wells, p. 170, note. FOSSILS of the Wealden, in Kent, Surrey, Hants, and Western Sussex, (85.)—(90.), pp.

172-181.

Endogenites erosa, (85.)—(89.), pp. 172-175.; its place in the cliffs; external forms, (85.), p. 172.; size of specimens, coating of coal, (85.)—(88.), p. 172.; internal structure, (89.), p. 175.

Other Fossils of the Wealden, in Kent, &c. (90.), p. 176; Wood-cut of Sphenopteris gracilis, p. 181.

ISLE OF WIGHT, (91.)-(102.), pp. 182–206.

Authorities; Mr. Webster, (91.), p. 182.; General structure, (92.), p. 182.; and order of strata, Pl. X. a. No. 7.-X. b. fig. 4., (93.), p. 182.; Wealden, its resemblance to beds above the chalk, and to new red sandstone, (94.), p. 184., M. Constant Prevost, 185, note.

Local distribution of strata, (96.) p. 186.; Sectional Sketches by Sir John Herschel, p. 186, note. LIST OF STRATA, from Bembridge Down to Sandown Bay; (97.), p. 187.; junction of Greensands and Wealden, (98.), p. 189.

Bonchurch-Cove to Sandown Bay; (99.), p. 191.; Dunnose, its true place, 191, note. Blackgang Chine to Brook Chine, (100.), p. 194.; junction of green-sands and Wealden; Wealdclay near Cowleaze Chine, p. 198.; Conleaze, Barnes' and Grange Chines, p. 199.

Afton Down to Brook Chine, (101.), p. 200.

FOSSILS of the strata below the Chalk, in the Isle of Wight, (102.), pp. 202-206.

DORSETSHIRE, (103.)-(120.), p. 206-233.

ISLE OF PURBECK; Pl. X. a. Nos. 8. and 9., and X. b. fig. 6. and 7. General arrangement and distribution of strata; list at Worbarrow Bay, (103.), p. 206.

Purbeck strata; thickness, (104.), p. 208. ; remarkable appearance near Swanage, p. 209, note. Portland-stone, (105.), p. 210. Portland-sand, (106.), p. 210.

Section at Emmet's Hill, p. 211. Pl. X. b. fig. 5. and 6. Kimmeridge-clay, (107.), p. 212.

COAST WEST OF PURBECK; General structure and stratification from Purbeck to Portland Island; great disturbances, (108.), p. 214. Sections to Whitenore, (109.), p. 215, and note. Lulworth Cove, p. 216; Man-of-War Cove, Plates X. a. Nos. 8. and 10.; X. b. fig. 7. and 8.; p. 217. ISLE OF PORTLAND. Authorities, (110.), 217.; Section and Detail of stratification, (111.), p. 218.; large silicified trunks, Wood-cut, pp. 221, 222.; slices for microscope, p. 222, note. Two beds containing Cycadea; above the "Cap", p. 222.; and beneath it, p. 223; large specimen, 223, note. General remarks; plants either Coniferæ, or Cycadea; and silicified amidst calcareous matter, (212.), p. 225.

Order of deposits, (113.), p. 225.; supposed analogy to phenomena at the mouth of the Indus, (114.), p. 226. The quarries in Portland ought to be frequently examined, (115.), p. 227. Portland strata on the opposite coast of France, (116.), p. 227.

FOSSILS of the beds below the chalk, on part of the Coast of Dorsetshire, (117.), p. 228.

DEVONSHIRE, (118.)—(123.), pp. 233–242.

General structure, (118.); subdivisions of coast to the east not discernible, p. 233. Berehead, Whitecliff, p. 234., Blackdown Hills, (119.), p. 235.; Sithestone pits, (120.), p. 236. Beds beneath green-sands, (121.), p. 238.

FOSSILS of the Blackdown pits; their abundance and general characters, (122.), p. 122.; Mr. Miller's collection; Plates XV. a., XVI., XVII., and XVIII., p. 239.

LIST OF FOSSILS of Blackdown, and some other places in Devonshire, (123.), pp. 239—242.

WILTSHIRE, (125.)—(142.), pp. 243–269.

SOUTH WILTSHIRE :-Blackdown hills to Shaftesbury, (124.), p. 243.

VALE OF WARDOUR; Anticlinal line, (125.), p. 244.; descriptions of sections, (Map, Pl. VII. fig. 3.; and Pl. X. a. No. 13.); General structure, (126.), p. 244. Details of strata; Chalk, (127.), p. 243.; Upper green-sand, (128.), p. 246. Gault, section at Ridge, (129.), p. 247.; Lower green-sand, (130.), p. 248. Wealden, (131.), p. 248. Purbeck strata; sectional lists, Dallard's, Dashlet, Chicksgrove, Wockley, (132.), pp. 249 -253.; junction of Purbeck and Portland formations, (133.), p. 253.; petrified trees, upright, (134.), p. 254.; Portland strata, (135.), p. 254.

STOURHEAD; Supposed section, (Wood-cut), (136.), p. 256.

VALE OF WARMINSTER; (137.), p. 257.

LIST OF FOSSILS of the Vales of Wardour and Warminster, (138.), p. 257.

NORTH WILTSHIRE :-Devizes, Calne, Sections by Mr. Lonsdale, (139.), p. 261.

VALE OF PEWSEY; Dr. Buckland's valleys of elevation, (140.), p. 263.

SWINDON; general structure, (141.), 264.; contact of Lower green-sand and Portland formation, (Wood-cut), 265.; sectionat the great quarry, 266.; great nodules in the Portland-sund, 267. FOSSILS of the strata below the chalk, in part of North Wiltshire, (142.), p. 267.

BERKSHIRE, OXFORDSHIRE, BUCKINGHAMSHIRE, PART OF BEDFORDSHIRE, (143.)-(155.), pp. 269-303.

General structure and distribution of strata, (143.), pp. 269-279.

SECTIONS, from the chalk, through Great Hazeley, Garsington, and Shotover, to Oxford, Pl. X.a. No. 18.; and through Tetsworth to Wheatley, Pl. X. a. No. 18'., and X. b. fig. 11., (144.) -(147.), pp. 274-279.

Shotover Hill; supposed Wealden beds, p. 274.; Purbeck strata, Combe Wood, freshwater fossils in oolite, 275.; Great Hazeley Quarry; erosion of the Portland-strata; "Gullies", (Wood-cut), p. 276.; pits at Garsington, p. 277.; Portland and Kimmeridge beds at Shotover, p. 278.; Kimmeridge and Weymouth beds, (145.); at Lancombe, 278.; Oxford-oolite, (147.), pp. 279-283.

SECTION, Pl. X. a., No. 19., from the chalk, through Thame and Long Crendon, to Brill and Muswell Hill, (148.), p. 279.

Brill, p. 280., lignitized tree, (section B.), p. 280.; Long Crendon, Thame, p. 281.; Portlandsand of Thame, at Barley Hill, p. 282.; large concretions in sand, (Wood-cut,) p. 283. SECTIONS, Pl. X. a. No. 20. and Pl. X. b. fig. 11., from the chalk at Wendover Hill, through Aylesbury and Whitchurch, Bucks, (149.)-(152.), pp. 283-293.

Stratification of the contiguous Counties, (150.), p. 284.; sectional list at Stone, p. 285.; at Dinton, p. 285.; disturbances above the Portland, (151.), p. 286.; clay like that of Portland, but not the "black-dirt bed", (152.), p. 286.; sectional list at Bishopstone, p.287.; near Whitchurch, p. 288.; at Quainton, supposed Hastings-beds?, 289.; Portland-sand at Whitchurch, p. 291.; Stewkley, p. 291.; Kimmeridge-clay at Hardwicke; Trigonellites, Exogyra Virgula, p. 292.

SECTIONS, from Dunstable through Hockliffe, to Stony Stratford, Pl. X. a. No. 21.; and to Woburn, No. 21'., (153.), pp. 292–295. Fuller's-earth near Woburn, Dr. Holloway, (1723.), p. 294.

NORTH-EAST OF BEDFORDSHIRE, (154.), p. 295.

LIST OF FOSSILS in part of Oxfordshire, Bucks, and Bedfordshire, (155.), pp. 296–303.

CAMBRIDGESHIRE, (156.)-(160.), pp. 303-309.

Authorities, (156.), p. 303, note; abundance of transported matter on the surface, (157.), p. 304. DESCRIPTION OF SECTIONS, Pl. X. a, Nos. 22, 25, and 24, (158.), pp. 305-309.; decline of

height of chalk range, p. 305.; Upper green-sand, p. 306.; Gault, p. 306.; Lower greensand, p. 306.; Kimmeridge-clay, p. 307.; Oxford-oolite; forms a wave, or low anticlinal ridge at Upware on the Cam; seen also on the north-west of Haddenham, p. 307. Chalk, in Rutlandshire, (159.), p. 308, and note; its existence, in situ, doubtful, p. 583*. Supposed traces of the Wealden in Northamptonshire, 309.; doubtful, p. 383*.

NORFOLK, (160.), (161.), p. 309–316.

WEST NORFOLK:-General structure, (160.), p. 309.; Authorities, p. 309, note. SECTION, Pl. X. a., No. 25., by Mr. C. B. Rose. Chalk, at Diss and Mildenhall, pp. 310, 311. Upper green-sand, p. 312. Gault, p. 212.; Lower green-sand, p. 313.

HUNSTANTON CLIFF; (161.), p. 313. Pl. X. a. No. 26; Pl. X. b. fig. 12. a, b, and c. Section, fig. 12. b. View, fig. 12. c. Sectional list of strata, p. 314.; comparative lists, p. 314, note; red chalk also in Lincolnshire, and Yorkshire, p. 315, note; Kimmeridge-clay, p. 315.; deep Well at Lynn, p. 316.

FOSSILS of the beds below the chalk, in part of Bedfordshire, Cambridgeshire, and Norfolk, (162.), pp. 316, 317.

SUMMARY AND GENERAL REMARKS, (163.)-(173.), pp. 318-334. General or abstract Section, Pl. 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, p. 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 à 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. 831.; 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. 332.; petrified shells, sometimes siliceous, p. 332.; Oolite in Oxfordshire, with freshwater shells, p. 333.; pisolitic iron ore in the Hastings-sands of England, p. 333.

Similarity of deposits of different epochs (171.), 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 inferences, p. 334. Acknowledgement of Mr. Lonsdale's assistance; Conclusion: p. 334.

APPENDIX.

A.-Descriptive notes respecting the shells figured in Plates XI. to XXIII., by JAMES DE CARLE 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 Stratigraphical 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. 3S2*, 383*.

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

in Northamptonshire, 383*: Supposed chalk in Rutlandshire, 383*: Inoceramus intermedius, 383*.

V.-Zoological Observations on a New Fossil Species of Chelydra,

from Eningen.

BY THOMAS BELL, Esq., F.G.S. F.R.S.

[Read January 18, 1832.]

THE Testudo serpentina of Linnæus appears long since to have been considered as constituting a distinct generic form by the accurate Schweigger, who applied to it the name Chelydra; but from the paper in which this distinction was first given to the world being little known, this tortoise has since received the generic appellations of Saurochelys, applied to it by Latreille, of Chelonura by Fleming, and of Rapara by Gray. The last-mentioned author has, however, very properly restored the name first given to it, in his Synopsis Reptilium, the first part of which has recently appeared.

The extraordinary length of the neck and tail, the great comparative breadth of the head, and especially the shape of the sternum, sufficiently distinguish it from every other form of the Testudinata. The sternum is very narrow and lozenge-shaped; and the ramus of the sternum (constituting on each side the symphysis between its body and the sterno-costal suture) is exceedingly long and narrow, so as to give the whole somewhat the form of a cross.

One recent species only has hitherto been discovered, the Chelydra serpentina; and I cannot find any mention of fossil remains of the genus in any work that I have been able to consult. The fine specimen which I will now proceed to describe is, however, fortunately, sufficiently perfect to leave not a moment's doubt of its relation to this genus, whilst it also retains sufficient osteological characters to establish it as a distinct species.

Of the specimen itself *, although but little of the dorsum remains, it is evidently the upper side of the sternum which is exposed, as is shown by some portions of the dorsal margin, which are still seen lying over the limbs as they emerge from the carapax. This is most obvious at the part where the left humerus may be observed, partly lying under the marginal extremity of the anterior ribs. With this exception, therefore, the whole of the dorsal portion is wanting, having most probably been removed with the superincumbent