﻿INDEX TO THE PROCEEDINGS. 



Ichthyolites of the coal, M. Agassiz on 

 the, noticed, lv. 



Iguanodon, noticed, lix. 



Impressions on the Potsdam sandstone, 

 Prof. Owen on the, 250. 



India, fossil fish from the oolite of, 272. 



Inferior oolite of Gloucestershire, Rev. 

 P. B. Brodie on the, 208. 



Insects, absence of, in some recent and 

 tertiary deposits, noticed, lv ; of the 

 coal, noticed, lv ; of the lias, noticed, 

 lviii ; of the Stonesfield oolite, no- 

 ticed, lxv. 



Invertebrata of the oolite, noticed, lvii. 



Ischypterus, noticed, lix. 



Jurassic strata of Yorkshire, the fossil 

 plants of the, 179. 



Kennedy's Pass, conglomerates of, 150. 



Kent, the soils covering the chalk of, 

 31. 



Kentville, recent rain-prints and foot- 

 tracks at, 240. 



Khyber Pass, pliocene and palaeozoic 

 rocks of the, 44. 



King, Dr., on carboniferous reptile- 

 tracks, noticed, lvii. 



Kirkcudbrightshire, Mr. Harkness on 

 the Silurian rocks of, 54 ; Sir R. I. 

 Murchison on the Silurian rocks of, 

 157. 



Knockdolian limestone, fossils of the, 

 154, 170. 



Lake Huron, 223; La Pluie, 217; 

 of the Woods, 215; Ontario and 

 Simcoe, 230 ; Saint Clair, 228 ; Su- 

 perior, bedded detritus of, 221 ; Su- 

 perior, loose detritus of, 219 ; Supe- 

 rior, trap islands of, 223. 



Lakes, North American, Dr. Bigsby on 

 the erratics of the, 215; Sir J. 

 Richardson on the physical geogra- 

 phy of the, 214. 



Land-shells, absence of, in the coal, no- 

 ticed, liv. 



Laterite, Mr. J. R. Logan on, 338. 



Lea, Mr. I., on carboniferous reptile- 

 tracks, noticed, lvii. 



Leaf-bed, post-tertiary, at Kintyre, 102. 



Leaf-beds at Ardtun, the Duke of Argyll 

 on tertiary, 94. 



Lepidotus Deccanensis, 273. 



Lessines, Prof. Delesse on the porphyry 

 of, 7. 



Lewes, the drift at, 361. 



Lias invertebrata, noticed, lviii. 



Limagne d'Auvergne, lacustrine beds 

 of the, 14, 76; mammalia of, no- 

 ticed, lxix. 



Linksfield quarry, Captain Brickenden 

 on the boulder-clay in the, 289. 



Loftus, Mr. W. K., on the geological 



structure of the mountain-range of 



Western Persia, 263. 

 Logan, Mr. J. R., on the geology of 



Singapore, 310. 

 Logan, Mr. W. E., on the occurrence 



of a track and footprints of an animal 



in the Potsdam sandstone of Lower 



Canada, 250 ; noticed, lxxv. 

 Longhope quarry, Mr. Salter and Sir P. 



Egerton on a fossil fish-tooth from, 



266. 



Lonsdale, Mr. W., on Choristopetalum 

 imparandCyathophora? elegans,! 13. 



Lund on the South American bone- 

 caverns, noticed, lxxi. 



Lybster, the Till at, 200. 



Lycopodites Williamsonis, 191. 



uncifolius, 191. 



Lyell, Sir C. (President), Address on 

 presenting the Wollaston medal to 

 the Rev. A. Sedgwick, xix ; Address 

 on presenting the Donation Fund 

 Award to the Foreign Secretary for 

 M. Joachim Barrande, xxi; Anni- 

 versary Address, xxv. Notices of 

 deceased Fellows : M. Beudant, xxv ; 

 M. M.-H. D. de Blainville, xxvi; 

 M. F. Dubois de Montpereux, xxvii ; 

 Sir Robert Peel, xxviii ; the Marquis 

 of Northampton, xxx ; Dr.Pye Smith, 

 xxxi. Prof. Sedgwick on the theory 

 of organic progression, xxxiii ; Prof. 

 Owen on the theory of progression, 

 xxxiv; Mr. Hugh Miller on the 

 theory of progression, xxxiv; Ad. 

 Brongniart on organic progression 

 among fossil plants, xxxv ; Bronn on 

 organic progression, xxxvi ; Constant 

 Prevost and Alcide d'Orbigny op- 

 posed to the doctrine of successive 

 development, xxxvi; points to be 

 considered as opposed to the theory 

 of successive development, xxxvii; 

 fossil plants considered in relation 

 with this theory, xxxix ; the carbo- 

 niferous flora, xl ; rarity of traces of 

 fructification amongst the coniferse 

 of the coal, xli ; compared with the 

 Wealden coniferse, xlii ; formation of 

 the coal-measures, xlii; rarity of 

 flowering plants in the coal, xliii ; 

 age of Acrogens, and the age of 

 Gymnosperms, xliii ; anthracite- 

 schists of the Tarentaise, their bi- 

 bliographical history, xliii; proba- 

 bility of their displacement by folding, 

 xlv and xlviii; probable age, xlvi; 

 contemporaneous with the anthracite 

 schists of Volterra, lviii ; jurassic flora, 

 xlix ; cretaceous flora, xlix ; tertiary 

 flora, 1 ; fossil animals considered in 



