THE 



QUAKTERLY JOUKNAL 



THE GEOLOGICAL SOCIETY OF LONDON, 



PROCEEDINGS 



OF 



THE GEOLOGICAL SOCIETY. 



December 18, 1867. 



T. Jones, Esq., 13 Dundas Terrace, Hampstead ; Martin Crofton 

 Morrison, Esq., late H.M. Consul in China ; James Wood Mason, 

 Esq., Queen's College, Oxford ; Marriott Ogle Tarbotton, Esq., 103 

 Victoria Street, Westminster ; and the Rev. Thomas Nicholson, 

 M.A., Ph.D., 3 Craven Street, Strand, were elected Fellows. 



The following communications were read : — 



1. On the Parallel Roads of Glen Roy. 

 By Sir John Lubbock, Bart., F.R.S., F.G.S., Pres. Ent. Soc. 



During the course of last autumn I had an opportunity of visiting 

 the celebrated Parallel Roads of Glen Roy, and, having been thereby 

 led to study the various memoirs which have been written on this 

 interesting subject, I have been brought to the conclusion that the 

 explanation given originally by Macculloch, as to the manner in 

 which the roads were produced, is not the correct one, although 

 it has been adopted by almost every one who has subsequently dis- 

 cussed their origin. 



I do not propose to reopen the discussion of the causes owing to 

 which the valley was filled with water, but, taking for granted that 

 these " roads" or " shelves" represent water-levels, to consider the 

 manner in which they have been formed. This is indeed a minor 

 point ; but I think I need not apologize to the Society for the attempt 



VOL. XXIV. PART I. H 



