420 



INDEX. 



Trees, branches and other remains of, in the Ken- 

 net peat, 128. 

 dicotyledonous fossil, in the Portland and 



Purbeck beds, 41. 

 trunks of, between White Rock and the 



West Cliff, Hastings, 35. 

 Trigonia, new species, Western Islands, 367. 

 Trionyx, bones of, enumerated, 379, 380. 

 . fossil remains of, found in the Irawadi, 



374. 

 Trottemish, Skye, highest members of the oolitic 



series, 363. 

 Tufa, horizontal strata of, separating the trachytes 



with their conglomerates from the graystone, 



Ponza, 225. 



near the Punto di Campanella, 352. 



Naples, 350. 



solid in the promontory of Pausilipo, &c. 



350. 



Tufas of Ischia described, 342. 



Monte Nuovo, 351. 



Sorrento, 352. 



Vico, 352. 



U. 



Univalves, chambered, in the lias formation at 

 Lyme Regis, 27. 



. of the Malm-rock, 99. 



in the chalk near Lyme 



Regis, 112. 



sands and sandstones be- 

 neath the chalk near Lyme Regis, 114. 



not chambered in the chalk, 112. 



sands and sand- 



stones beneath the chalk near Lyme Regis, 

 114. 

 ■ lias formation at 



Lyme Regis, 28. 

 — • irregular in the lias formation at Lyme 



Regis, 28. 

 multilocular, of the Jamaica white 



limestone formation, 170. 

 not chambered, of the same, 170. 



Upper greensand or firestone of Hants &c., depth 



of, 99. 

 . marine and lower freshwater formations, 



junction of the horizontal strata of, 94 note. 



V. 



Valleys of elevation, 123. 



Vegetable matter and wood abundant in the 



blacker beds of clay at Kintbury, 120. 

 remains in the lias formation of Lyme 



Regis, 29. 

 Vegetables, fragments of, carbonized in the 



lower parts of the strata at Hastings, 31. 

 Ventotiene, island of, 221. 

 Vertebrae, fossil, of new gigantic Saurian, 104. 

 Vesuvius, a principal volcanic vent, 338. 

 __ cone of, when formed, 339. 



— crater of, 339. 



— eruptions of, described, 339, 340. 



— mountain of, described, 340, 341. 



Vico, volcanic formations at, 352. 



Viverra, bones of a carnivorous animal from 

 Bengal, of the genus, 393. 



Viviparae in the Weald clay, 103. 



Volcanic formations shown at Vico and Sor- 

 rento, 352. 



rocks at Black Hill, Jamaica, 186. 



vents parallel to the nearest linear ele- 



vation of strata, 337. 



Vomero, hill of, structure noticed, 350. 



W. 



Wallich, Dr., his opinions and remarks on the 

 supposed power of the waters of the Irawadi 

 to convert wood into stone, 403. 



Weald clay, ancient iron-works in, 103. 



Cypris Faba in, 103. 



at Harting Combe, nucleus of Wes- 

 tern part of the district, 102. 



• passage from the lower green-sand 



Uppat, hills of, composed of red conglomerate, 

 294. 



■ viviparje in, 103. 



Webster, Thomas, Esq., fossil plant presented to 

 the Geological Society by, 395. 



