TABLE OF CONTENTS. ORIGINAL COMMUNICATIONS. Page ARGYLL, The Duke of. On Tertiary Leaf-beds in the Isle of Mull.. 89 AUSTEN, R. A. C., Esq. On the Superficial Accumulations of the Coasts of the English Channel, and the Changes they indicate .... 118 .. On the Gravel Beds of the Valley of the Wey ............ 278 BECKLES, L. H., Esq. On supposed Casts of the Imprints of Birds' Feet in the Wealden ...................................... 117 BIGSBY, Dr. J.J. On the Ermties of Canada .................. 215 BRICKENDEN, Capt. R.L. On the Occurrence of the Boulder Clay in the Limestone Quarry, Linksfield, Elgin ............ page 38 & 289 BRODIE, Rev. P.B. On the Basement Beds of the Inferior Oolite in Gloucestershire .......................................... 208 BUNBURY, C. J. F., Esq. On some Fossil Plants from the Jurassic Strata of the Yorkshire Coast .............................. ] 79 CATULLO, Prof. T.A. On the Epiolitie Rocks of the Venetian Alps 66 CLEGHORN, J., Esq. On the Till of Caithness .................. 200 DAWES, J. S., Esq. Further Remarks upon the Calamite ........ 196 DAWSON,J. W., Esq. Notice of the occurrence of Upright Calamites near Pietou, Nova Scotia .................................. 194 DELESSE, Prof. A. On the Porphyry of Belgium .............. 6 On the Rose-coloured Syenite of Egypt .................. 9 EGERTON, Sir P. de M.G. Description of the Specimens of the Fossil Fish from the Deccan, India .......................... 273 FORBES, Prof. E. Note on the Vegetable Remains from Ardtun Head. 103 On the Estuary Beds and the Oxford Clay at Loch Staflln .. 104 HARKNESS, R., Esq. On the Silurian Rocks of Dumfriesshire and Kirkeudbrightshire ........................................ 46 . Description of the Graptolites of Dumfriesshire ............ 58 LOFTUS, W. K., Esq. On the Geological Structure of the Mountain Range of Western Persia 263 LOGAN, J. R., Esq. On the Geology of Singapore .............. 310 LOGAN, W. E., Esq. On the Occurrence of a Track and Foot-prints of an Animal in the Potsdam Sandstone of Lower Canada ...... 247 LONSDALE, W., Esq. Memorandum respecting Choristopetalum im- par and Cyathophora? elegans .............................. 113 LYELL, Sir C. On Fossil Rain-marks of the Recent, Triassic, and Carboniferous Periods .................................... 238 MACKIE, S. J., Esq. On a Deposit at Folkestone containing Bones of Mammalia ............................................. 257 TABLE OF CONTENTS. Page MURCHISON, Sir R.I. The Slaty Rocks of Sichon shown to be of Carboniferous age ........................................ 13 . On the Origin of the Mineral Springs of Vichy .... -........ 76 ----. On the Silurian Rocks of the South of Scotland .......... ]37 - . On the Distribution of the Flint Drift of the South-east of England, on the Flanks of the Weald, and over the Surface of the South and North Downs .......................... page 257 & 349 Notice of the Coal Mines near Erzeroom ........................ 65 of a New Combustible Substance discovered in Russia ........ 66 of the Occurrence of an Earthquake at Brussa .............. 19 of an Earthquake at Carthagena, New Granada ............ 238 ORMEROD, G. W., Esq. Section and Analysis of Permian Beds at Astley, Lancashire ........................................ 268 OWEN, Prof. R. Description of the Impressions on the Potsdam Sandstone, discovered by Mr. Logan, in Lower Canada .......... 250 PRESTWlCH, J., Esq., jun. On the Drift at Sangatte Cliff ........ 274 RAMSAY, Prof. A.C. On the Sequence of Events during the Pleis- tocene Period, as evinced bv the Superficial Accumulations and Surface-markings of North V~rales EDeferred.] .............. 207 RICHARDSON, Sir J. On some points of the Physical Geography of North America in connexion with its Geological Structure ...... 212 SALTER~ J. W., Esq. List and Description of the Silurian Fossils of Ayrshire ................................................ 137 On the Remains of Fish in the Silurian Rocks of Great Britain. 263 SORBY, IX. C., Esq. On the Microscopical Structure of the Calca- reous Grit of Yorkshire .................................... 1 STRACHEY, Capt. R. On the Geology of part of the Himalaya Mountains and Tibet ...................................... 292 STRICKLAND, IX. E., Esq. On the Elevatory Forces that raised the Malvern Ixills. [Withdrm~la.] .............................. 268 SYKES, Col. H. 0n a Fossil Fish fi'om the Table-land of the Deccan 272 TRIMMER, J., Esq. Generalizations respecting the Erratic Tertiaries of Norfolk .............................................. 19 .. On the Origin of the Soils which cover the Chalk of Kent .. 31 On the Erratic Tertiaries bordering the Penine Chain, between Congleton and Macclesfield; and on the Scratched Detritus of the Till 201 On the Physical Evidence of an Extreme Arctic Climate during the Formation of the Erratic Tertiaries of England and Wales. ~Srithdrawn.] ............................................ 273 VICARY, Major. On the Geology of the Upper Ptmjanb and Peshaur 38 Annual Report ............................................ i. Anniversary Address ........................................ xix. Donations to the Library .................... pages 85, 137, 253, 345 .