INDEX. 



Green sand, extent of, on part of the coast of 



France, 75. 

 —^ section of, procured in boring at Mil- 



denhall in Suffolk, 380. 

 Grey-wack^ of the Forest of Dean described, 



280. 

 Gypsum, of northern salt district in Russia, 12. 



containing shells, 26. 



——~ coriaceous, 28. 



of Monte Seano described, 169. 



H. 



Haematitic iron ore in magnesian limestone, 356. 

 Henqueville, Portland beds in the cliffs at, 77. 

 Heuland, H. Esq., notice respecting the matrix of 



the Brazilian diamond, 419. 

 Himalaya mountains, difficulties encountered in 



examining the higher parts of, 125. 



— gneiss in, 127. 



mica slate in, 127. 



.- granite, quartz, hornblende. 



and mica in, 127. 



20,000 feet in, 128. 



granite at the height of 



clay slate in, 1 28. 



i — actinolite, drawing slate, 

 .sparry iron ore, &c., in, 129. 



■ granular limestone and gra- 



nite with tourmaline at the height of 19,411 

 feet in, 129, 130. 

 primitive character of, 131. 



Hordwell cliff, the whole of the lower part of, con • 



sists of fresh-water formation, 92. 

 Hot springs near Muscat in Arabia, 409. 

 Huron, Lake : .«ee Lake Huron. 

 Hurst castle, bar of, how formed, 9 1 . 

 Hymenopteris psilotoides, fossil fern, described, 



424. 



Jack, William, M.D,, on the geology and topogra- 

 phy of the island of Sumatra, and some of the 

 adjacent islands, 397. 



ichthyosaurus, 43. 



analogies of the, considered, 104. 



• dentition of the, 105. 



• the various species of, 108. 



— — structure of the lower jaw of, 109. 



eye and orbit of, 113. 



temporal fossae of, 113. 



— nostrils and anterior part of upper 



jaw described, 113. 



■ position of the tympanal bone of, 



&c., 116. 



— occipital bones of, 116. 



palatal bones, pterygoids of, &c., 



117. 



vertebrae and extremities of, 118. 



bones of, found in the lias of Twi- 



verton and Keynsham, 302. 

 Iron ore, 8. 



— — acicular oxide of, 9. 

 — ■ — oxides of, in island of Lake Onega, 9. 



haematitic, in magnesian limestone, 356. 



sand : see Ferruginous sand. 



works of Petrozavodsk, 10. 



ofVixa,31. 



of Toula, 32. 



Jura, Isle of, terraces or ancient beaches in, 416. 



K. 



Kama river, 24. 



Kishme island in the Persian Gulf, strata of, 41 1. 

 Kunker, a calcareous concretion so termed, in 

 India, 148, 149, 150, 158. 



I.J. 



Jack, William, M.D., extract of a letter from, to 

 H. T. Colebrooke, Esq., containing a notice re- 

 specting the rocks of the islands of Penang and 

 Singapore, 165, 



VOL. VI. 3 M 



La Manche, department de, 86. 



Ladoga, Lake of, 8. 



Lake Huron, on the geography and geology of, 75. 



• Manitouline Islands in, 176 — 181, 



199—204. 



Island of St. Joseph in, 182. 



