INDEX. 



499 



Helsingburg, in Scania, probable existence there, 



of a deposit analogous to tlie Wealden, 330. 

 Hematite of Mahabuleshwur in the Dukhun pro- 

 duces the Wootz steel, 426. 

 Henslow, Rev. Prof., his observations on the strata 

 containing stratified trunks in Portland, 16, 

 note; referred to, 218, 220. 



, notice of the temperature of 



springs in the neighbourhood of Weymouth, 44, 

 note. 



Herschel, Sir John, examines the colouring mat- 

 ter of the green sands, 109. 



, sectional drawings, and lists 



by, of the strata on the south of the Isle of 

 Wight, referred to, 186. 



High Pike to the top of Great Colm, notice of the 

 beds from, 87. 



Hill forts in the Dukhun, their great strength due 

 to trap, 414. 



Hills, Mr. of Court-at-Street, Kent, numerous 

 fossils collected by, 112, 127, note, 128, 339. 



Hindhead, Surrey, stratification at, 144. 



, sands near, described, 147. 



Hockliffe, in Bedfordshire, section through, 292. 



Hoer, in Scania, fossil plants there analogous to 

 those of the Wealden, but probably belonging 

 to the oolite series, 330. 



Hog's-back, Surrey, a ridge of chalk strata highly 

 inclined, 145. 



Hole Beck near Stank, beds of cellular magnesian 

 limestone, form base of red sandstone, 389. 



Hollows, which may have been craters, in the 

 Vindhya range, mentioned, 428. 



Holworth Cliff, notice of the spontaneous com- 

 bustion of the Kimmeridge clay in, 23. 



Horner, Leonard, Esq., on the geology of the 

 environs of Bonn, 433. 



— geological specimens de- 

 posited by him in the museum of the Society, 

 434. 



■ , his coloured map of the 



environs of Bonn, 434. 



, his notice of Mr. Ly- 



ell's observations on the loess, 475, 476. 

 , modification of his opi- 



Hot springs of the trap mountains of Rajmahl, 



427. 

 Howgill Fells to Baw Fell, account of a section 



from the, 96. 

 Hunstanton Cliff, Norfolk, sectional lists of strata 



at, 313, 314. 



, sections of, by different 



geologists compared, 315, note. 

 , red stratum between 



the chalk and the Lower green-sand there, 314, 

 315, note. 



Hunter, Rev. Joseph, notes by, on the word 

 Hurst, 162, note. 



Huntingdonshire, not yet described geologically, 

 303, note. 



Hurreechundurghur, hill fort of, its situation de- 

 scribed, 411. 



, remarkable basaltic dyke at, 



418. 



, glassy felspar, resembling 



Cleavelandite, found there in amygdaloid, 424. 



" Hurst", the word of frequent occurrence in the 

 names of places in Kent, Sussex, andSurrey,! 6 1 , 

 note. 



, its meaning explained, 162, note. 



Hylaeosaurus, a new fossil of the Wealden, dis- 

 covered and described by Mr. Mantell, 179. 



I. 



Ichthyophthalmite in the amygdaloid of the 



Dukhun, 424. 

 , splendid specimens of, found 



at Poona, 425. 

 Ichthyosiagones, a name given to a species of 



Trigonellites, by Dr. Riippell, 348. 

 Iguanodon, new portions of the skeleton found 



near Maidstone, in the Lower green-sand, 132, 



note. 

 India, age of the trap formation of, undetermi- 

 nable, 429. 

 , Peninsula of, its characteristic geological 



features recapitulated, 431. 

 , granite, its basis, 431. 



nions respecting the history of the loess, 479. 

 VOL. IV. SECOND SERIES. 



Indus, mouth of the, phenomena there like those 

 which produced the strata in Portland, 226. 

 3 T 



