CONTENTS. XI 



Page 

 Mr. Charles Moore on the Age of the Durdham Down Deposit, yielding 

 Thecoduntusaurus &c 77 



Mr. J. 11. Mortimer on the Distribution of Flint in the Chalk of Yorkshire . 78 



ProfessorH. Alleyne Nicholson on^sy^o^ro^^ws, anewGenus of Graptolites 

 fi.-om the Skiddaw Slates 78 



and Mr. Charles Lapworth on the Cen- 

 tral Group of the Silurian Series of the North of England 78 



Dr. Charles Ricketts on the Cause of the Glacial Period, with reference 

 to the British Isles 79 



Mr. William Sanders on certain large Bones in Rhsetic Beds at Aust Cliff, 

 near Bristol 80 



Mr. W. W. Stoddart on Auriferous Limestone at Walton 81 



Rev. W. S. Symonds on Changes of Climate during the Glacial Period .... 82 



Mr. E. B. Tawney on the Age of the Cannington-Park Limestone, and its 

 Relation to Coal-measures South of the Mendips 82 



Mr. J. E. Taylor on the Discovery of a Submerged Forest in the Estuary of 

 the Orwell , 82 



Professor J. Tennant on the South-African Diamonds 82 



Mr. James Thomson on a new Genus of Rugous Corals from the Mountain- 

 Limestone of Scotland 8-3 



Mr. William A. Traill on the Occurrence of a Lower Boulder-clay, or Till 

 with Shells, in the Counties of Down and Mayo, Ireland 83 



. on a Mass of Travertine or Calcareous Tuff, called 



" The Glen Rock," near Bally castle. County Mayo, Ireland 84 



Dr. Thomas Wright on the Reptilian Remains from the Dolomitic Conglo- 

 merate on Durdham Down 85 



BIOLOGY. 



Address by P. L. Sclater, M.A., Ph.D., F.R.S., F.L.S., President of the 

 Section 85 



Botant. 



Dr. Sclater's Address 85 



Professor Balfour on Rare Plants fi-om Scotland 156 



Mr. I. Bayley Balfour on Turneracece from Rodrigaiez 156 



on the Geological Structure and Flora of the Mas- 



carene Islands 157 



Professor A. Dickson on an Abnormality o? Primula vulgaris with Interpeta- 



line Lobes 157 



on a Monstrosity in Saxifraga stellaris 167 



on Abnormal Flowers of Tropceohim 157 



Professor W. R. M'^Nab on a Variety of Polypodium vulgare 158 



on a Variety of Rubus 158 



Mr. J. J. Monteiro on the Application of the Fibre of Adansonia digitata . . 158 



Dr. David Moore on Spiranthes Homanzoviana 158 



