314 PEOCEEDIITGS OP THE GEOLOGICAL SOCIETY. [JlinC 9, 



hinder half of the alveolar margin of the bone. Each praemaxilla 

 sends two processes upwards and backwards, one in front of, and one 

 behind, the nasal aperture, to meet the large nasal bone. 



Discussion. 



Mr. Boyd Dawkins made some remarks as to the stratigraphical 

 range of Megalosaurus. The oldest example with which he was 

 acquainted was a tooth from the Lias of Lyme. It occurred also 

 in the Lower Oolite of Dorset. Higher up it was found in the 

 Kimmeridge Clay, and again in the Tilgate Beds of the Wealden. He 

 had, however, himself found it in the Wadhurst Clay, above the 

 Ashdown Sands, near Battle. He had also seen remains in still 

 higher beds, possibly of Lower-Greensand age, at Potton ; but in this 

 case the bones were probably derivative. An animal with almost 

 identical teeth, the Teratosaurus suevicus of Yon Meyer, occurred in 

 the Lower Keuper, and possibly might belong to the same generic form. 



The PREsiDE]!(rT agreed that the Dinosaurians had occurred in the 

 Trias, and that he was quite prepared for an extension of the family 

 into earlier beds. 



June 9, 1869. 



William Shelford, Esq., Memb. Inst. C.E., 7 Westminster Cham- 

 bers, Victoria Street, S.W. ; E. Teschemacher, Esq., 1 Highbury 

 Park, N. ; George Ludovic Houstoun, Esq., of Johnstone Castle, 

 Renfrewshire ; and T. P. Barkas, Esq., Newcastle-upon-Tyne, were 

 elected Eellows of the Society. 



The following communications were read : — 



1. Notes on the Sutherland Gold-field. By the Rev. J. M. Jo ass. 

 With an Introduction by Sir Roderick I. Murchison, Bart., 

 K.C.B., F.R.S., Y.P.G.S. 



[Plate XIII.] 



Introduction. 



The district of Sutherland in which gold has been recently disco- 

 vered and worked, in certain waterworn materials and graveUy de- 

 tritus which cover the crystalline Lower Silurian rocks in several 

 depressions at and near Kildonnan in Sutherland, is the eastern ex- 

 tremity of a region which I have personally explored at intervals 

 for the last forty-three years. It was, however, only in the year 

 1858 that I fully satisfied myself as to the relative ages and order of 

 superposition and character of all the various rock-formations which 

 occur between the western and eastern coasts of Sutherland and Ross. 

 It was then that for the first time I was enabled to show distinctly an 

 ascending order from the fundamental gneiss or Laurentian rocks of 

 the northern highlands, through great masses of sandstone and con- 

 glomerate of Cambrian age, upwards through overlying quartz-rocks 



