CXXvili PROCEEDINGS OP THE GEOLOGICAL SOCIETY. [Aug. 1 896. 



that the wonder was not that so many specimens were imperfect, 

 but that any structure had been preserved. He also shortly noticed 

 the growing probabilities in favour of the existence of a rich marine 

 fauna in pre-Cambrian times, and some of the discoveries in this 

 direction already made or in progress. 



The following communications were read : — 



1 . 4 Notes on the Glacial Geology of Arctic Europe and its 

 Islands. — Part II. Arctic Norway, Russian Lapland, Novaya 

 Zemlya, and Spitsbergen.' By Col. H. W. Feilden, F.G.S. With 

 an Appendix by Prof. T. G. Bonney, D.Sc, LL.D., F.R.S., 

 V.P.G.S. 



2. 'Extrusive and Intrusive Igneous Bocks as Products of 

 Magmatic Differentiation.' By Prof. J. P. Iddings, For.Corr.G.S. 



The following specimens, etc., were exhibited : — 



Rock-specimens and fossils, exhibited by Col. H. W. Feilden, 

 F.G.S., in illustration of his paper. 



Lantern- slides and microscopic sections of Eozoon canadense, ex- 

 hibited by Sir J. William Dawson, C.M.G., E.R.S., F.G.S. 



Sheet 7 (N.W. Wales) of the Geological Survey Index Map, 

 on the scale of 4 miles to 1 inch, presented by the Director- General 

 of that Survey. 



