INDEX. 



Aconcagua, notice of the eruption of, Jan. 1839, 



611. 

 Actinoceras, a genus of Orthocerata, described, 



705. 

 . Simmsii, observations respecting a 



coral attached to the surface of, 710. 

 Aiken, Arthur, Esq., remarks by, on a piece of 



bog-wood containing small particles of metallic 



copper, 214. 

 Aire, notice of the partially petrified wood and 



nuts of the valley of the, 210. 

 Akserai, structure of the country near, 587. 

 Alajahscheher, observations on the country near, 



592. 

 Allen Bank, remarks on a specimen of calcareous 



fossil wood from, 208, 209. 

 Allesley, near Coventry, observations on the 



beds containing silicified stems of trees, 347. 

 — remarks on specimens of fossil woods 



from, 214. 

 Allihies, notice of the copper mines of, 27. 

 Alluvial accumulations, notices of, in the St. 



Lawrence, 90, 96, 100. 

 . comparison of, with the 



tertiary accumulations, 96. 

 . notices of, in Cutch, 



304. 

 in the Bermudas con- 

 fined to marshes, 108. 

 Alum shale, or upper lias, subdivisions of, on 



the coast of Yorkshire, 215, 225, 237. 

 distribution of fossils in, 219, 225, 



238. 

 Alum works, account of near Mhurr, 295. 



VOL. V. SECOND SERIES. 5 



Amies Field, near Broseley, coal-shaft section, 478: 



Ammonites, vertical range of, in the upper lias 

 and raarlstone of Yorkshire limited, 216. 



Annagh mine, near Castlemaine, account of, 64. 



Antigua, remarks on a specimen of fossil wood 

 from, 208, 209. 



Antrim, on the geological structure of the north- 

 eastern part of, 69. 



physical features and heights of the 



principal mountains, 69. 



description of the formations : — 



mica-slate, hornblende- 



74. 



78. 



slate, granite, &c., 70. 



• old red sandstone, 71. 



porphyry, 73. 



carboniferous series, 



new red sandstone, 75. 



lias, 77. 



green sand or mulatto, 



chalk, 79. 



trap, 81. 



syenite veins which 



traverse mica-slate and chalk to the south of 



Fair Head, 179. 

 Ardleigh, section of London clay near, 369. 

 Argillaceous limestone and schist, description of, 



in the eastern portion of the basaltic district 



of India, 539, 553, 555, 557. 

 — — remarks on the 



relative age of, 568. 

 Armoy, notices of formations near, 70, 71, 78, 80. 

 Ashburton limestone, account of, 630, 652 note. 

 Ashow, section of Warwick sandstone, south-east 



of, 344. 



