X CONTENTS. 



Pago 



Professor Harkness on the Metamorphic Rocks and Serpentine Marbles of 



Connemara and Joyce's Country 59 



Dr. Harvey B. Holi, on the Pre-Cambrian Pocks of Central England 59 



Rev. W. Holland's Remarks on the Geology of Parts of the Sinaitic Penin- 

 sula 62 



Rev. H. Housman on the Fossil Footprints in the New Red Sandstone at 

 Brewood, near Wolverhampton 62 



Mr. J. Gwyn Jeffreys's Notice of the Occurrence of certain Fossil Shells 

 in the Sea-bed adjoining the Channel Islands 62 



Mr. H. Johnson on the Extent and Duration of the South Staffordshire Coal- 

 field 63 



Mr. C. Ketley on the Silurian Rocks and Fossils of Dudley 63 



Mr. E. Ray Lankester on Annelida from Guernsey 65 



on the British Species of Cephalaspis and the Scotch 



Pteraspis 65 



Mr. D. Mackintosh on the Relative Extent of Atmospheric and Oceanic De- 

 nudation, with a particular reference to certain Rocks and Valleys in York- 

 shire and Derbyshire 65 



Rev. A. W. M c Kay on the Red Sandstone of Nova Scotia 66 



Mr. George Maw on some Fossiliferous Strata occurring between the Bunter 

 Sandstone and Mountain Limestone of the Vale of Clwyd, North Wales . . 67 



on an Extensive Distribution of WTiite Sands and Clays in 



North Wales antecedent to the Boulder Clay Drift 68 



Mr. W. S. Mitchell on hitherto unrecorded Leaf Forms, &c, from Alum 

 Bay, Isle of Wight 68 



Mr. W. Ness on the Coal-Measures in Mold Valley, and their Products .... 68 



Mr. R. A. Peacock on Steam as the active Agent in Earthquakes 68 



on Extensive and Deep Sinkings of Lands in the Channel 



Islands Seas, and on some Changes of the French Coast of the Bay of Bis- 

 cay within the Historical Period 70 



Mr. W. Pengelly on the Insulation of St. Michael's Mount in Cornwall. ... 71 



Mr. Lovibond Percival on a Recent Example of the Formation of Pyrites 

 in a South Staffordshire Coal Pit 71 



Professor Phillips on Glacial Striation 71 



Rev. W. Purton on the Geology of Coalbrook Dale 72 



Mr. T. A. Readwtn on the Recent Discovery of Gold at Gwynfynydd, North 

 Wales 73 



Mr. George E. Roberts's Notes on the Theory of Repulsion as illustrative 

 of Physical Geology propounded by Dr. Winslow of Boston 73 



Professor Ferd. Roemer on a Fossil Spider lately discovered in the Coal- 

 measures of Upper Silesia (Prussia) 73 



Mr. G. R. Rumney on a Coal Field in Brazil 73 



Mr. J. W. Salter's Explanation of a Map of the Faults in the Gold District 

 of Dolgelly 73 



Mr. A. Startin on the Drift in the Parish of Exhall, North of Coventry. ... 74 



Rev. W. S. Symonds on some Ancient Drifts and Old River Beds of Siluria 74 



Mi-. J. E. Taylor on Contortions in the Chalk at Withingham, near Norwich 76 



Professor Tennant on the Agate* found in England, with specimens from dif- 

 ferent countries 76 



