jy'2 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Dec. 3, 



7. It contains large deposits of copper, native and in a state of 

 combination: — not so the Cambrian*. 



8. The Upper Huronian of Logan (his copper-bearing rock) has 

 no resemblance to, or affinity with, the Cambrian (see Synopses, 

 Tables I. and III.). 



9. It is destitute of the traces of life : — not quite so the Cambrian. 

 Y. Conclusion. — It is now time to conclude by observing that the 



1st, 2nd, 4th, and 9th of these points appear to be fatal to any idea 

 of the Huronian and Cambrian being the same formation, while the 

 rest are not without weight. 



Three circumstances create in my mind a strong feeling that the 

 Huronian is greatly the older deposit. These are : — 



1. Its marked similarity, lithologically, to the Fundamental 

 Gneiss formation. 



2. The conformity of these two sets of beds. 



3. The great interval of time which must have elapsed between 

 the periods of laying down the Fundamental formation and the 

 Silurian, if we are to judge from the occasionally vast thickness of 

 the Cambrian. 



Beyond all comparison, the Huronian is more wide-spread and 

 extensive, as well as more uniform in its mineral constitution, than 

 the Cambrian group. It is, perhaps, also more important economi- 

 cally. 



December 3, 1862. 



Edward Hesketh Birkenhead, Esq., Master of the Wigan School 

 of Mines; Antonio Brady, Esq., Maryland Point, Stratford, Essex; 

 Samuel Higgs, Jun., Esq., Assistant- Secretary of the Royal Geo- 

 logical Society of Cornwall, Penzance ; and Alan Lambert, Esq., 

 2 Portugal Street, Grosvenor Square, London, were elected Fellows. 



The following communications were read : — 



1. Description of the Remains of a new Enaliosaurian (Eosaurus 

 Acadianus), from the Coal-formation of Nova Scotia. By 0. C. 

 Marsh, Esq., M.A. 



(Communicated by Sir Charles Xyell, V.P.G.S.) 



[The Regulations of the Society do not admit of this important cornmunica- 

 tion being printed in full in the ' Quarterly Journal,' because, owing to an unfor- 

 tunate misunderstanding, it was not received until after it had been published 

 in the ' American Journal of Science and Arts ' for July 1862, New Series, 

 vol. xxxiv. p. 1, to which palaeontologists are referred for a more detailed descrip- 

 tion of the fossil bones alluded to.] 



[Abstract.] 



Introduction. — The Reptilian remains from the Coal-measures, 

 hitherto described, were stated to be few in number, and mostly of 



* There is some copper in the Longmynd. 



