CONTENTS. XI 



Page 



Dr. Jamks Brych on the Granite of Strath-Errick, Lough Ness 87 



on the Earthquake Districts of Scotland 88 



Dr. James Croll on the Tidal-Retardation Argument for the Age of the Earth 88 

 Mr. C. E. De Rance on the Variation in Thickness of the Middle Coal Mea- 

 sures of the "Wigan Coal-field ; • ■ • ^^ 



Dr. Anton Fritsch on Labyrinthodont Remains from the Upper Carbonifer- 

 ous (Gas-Coal) of Bohemia ®^ 



Mr George A. Gibson on the Physical Geology and Geological Structure of 



Foula ^" 



Dr. Gilchrist on the Red Soil of India 90 



Professors Hahkness and A. H. Nicholson on the Strata and Fossils between 



the Borrowdaile Series of the Coniston Flags of the North of England 90 



Professor Edward Hull on the Upper Limit of the essentially Marine Beds 

 of the Carboniferous System of the British Isles, and the necessity for the 



establishment of a Middle Carboniferous Group 90 



on a Deep Boring for Coal at Scarle, near Ijincoln . . 91 



Mr. R. L. Jack on Tertiary Basalt-rock Dykes in Scotland 9^ 



Dr. Von Lasahlx on some New Minerals, and on Doubly-refracting Garnets . 92 

 Mr. G. A. Lebour on the Changes affecting the Southern Extension of the 



Lowest Carboniferous Rocks '^'^ 



Mr. J. Macfadzean on the Parallel Roads of Glen Roy 93 



Dr. David Milne-Hoivle on the Parallel Roads of Glen Roy 93 



on High-level Terraces in Carron Valley, County of 



Linlithgow 



Mr. W. S. Mitchell on the Bagshot Peat-Beds 94 



Mr. C. W. Peach on Circinnate Vernation of Sphenopteris affinis from the 

 Earliest Stage to Completion ; and on the Discovery of Staphylopteris, a 



Genus new to British Rocks "^^ 



Dr. F. RoMER on the Mountain Limestone of the West Coast of Sumatra 95 



Mr. R. Russell and Mr. J. V. Holmes on the Raised Beach on the Cumber- 

 land Coast, between Whitehaven and Bowness 95 



Rev. E. Sewell on the Drifts and Boulders of the upper part of the Valley of 



the Wharfe, Yorkshire 95 



Dr. R. Slimon on the Upper Silurian Rocks of Lesmahagow 96 



Mr. J. E. Taylor on the Age, Fauna, and Mode of Occurrence of the Phos- 

 phorite Deposits of the South of France 96 



Professor James Thomson on Ridgy Structure in Coal, with Suggestions for 



accounting for its Origin "^^ 



on further Illustrations of the Jointed Prismatic 



Structure in Basalts and other Igneous Rocks 96 



Mr. William A. Traill on certain pre-Carboniferous and Metamorphosed 



Trap-dykes and the Associated Rocks of North Mayo, Ireland 97 



Mr. H. Willett on the Sub-Wealden Exploration 97 



Professor W. C. Williamson on Recent Researches into the Organization of 



some of the Plants of the Coal-measures 98 



Mr. E. A. WiJNSCH on the Junction of Granite and Old Red Sandstone at 



Corrie and Glen Sannox, Arran 98 



Mr. John Young on Siliceous Sponges from the Carboniferous Limestone near 

 Glasgow 99 



BIOLOGY. 



Address by Alfred Russel Wallace, F.R.G.S., F.L.S., President of the 



Section 



100 



