318 Geological Society : — 



Physical and Palaeontological evidence distinctly proves, the 

 author stated, that the whole of the slates and limestones of Lee, 

 Ilfracombe, and Combe Martin underlie the Morte Bay red sand- 

 stones. 



The author compared the whole of the Devonian fauna of Britain 

 with that of the Rhine, Belgium, and France, by means of a series 

 of Tables based upon the British types. These marine Devonian 

 species were compared with those of the Old Red Sandstone proper, 

 the Silurian, and Carboniferous, and analyses were made of all the 

 classes, orders, genera, and species, with relation to the groups of 

 rocks in which they occur — the result being the conclusion that the 

 marine Devonian series, as a whole, constitutes an important and 

 definite system. 



May 8, 1867.— Warington W. Smyth, Esq., M.A., F.R.S., 

 President, in the Chair. 



The following communications were read : — 



1. " On new suecimens of Eozoon."" By Sir W. E. Logan, 

 F.R.S., F.G.S. 



Amongst several additional specimens of Eozoon which have been 

 obtained during recent explorations of the Canadian Geological 

 Survey, is one which was found last summer by Mr. G. H. Vennor 

 in the township of Tudor, county of Hastings, Canada West. It 

 occurred on the surface of a layer, three inches in thickness, of dark- 

 grey micaceous limestone, or calc-schist, near the middle of a great 

 zone of similar rock. This Tudor limestone is comparatively un- 

 altered ; and in the specimen obtained from it the skeleton of the 

 fossil, consisting of white carbonate of lime, is imbedded in the 

 limestone without the presence of serpentine or other silicate, a fact 

 which the author regarded as extremely favourable to the view of 

 the organic origin of Eozoon. Sir William Logan also described 

 the nature and relations of the rocks of other localities which have 

 recently yielded Eozoon, especially Wentworth, Long Lake, and 

 Cote St. Pierre. 



2. " Notes on Fossils recently obtained from the Laurentian rocks 

 of Canada, and on objections to the organic nature of Eozoon." By 

 J. W.Dawson, LL.D.. F.R.S., F.G.S. 



The first specimen described in this paper was the one from Tudor 

 referred to in the previous communication. Its examination had 

 enabled Dr. Dawson to state that in it the chambers are more con- 

 tinuous, and wider in proportion to the thickness of the septa, than 

 in the specimens found elsewhere, and that the canal-system is more 

 delicate and indistinct. Without additional specimens the author 

 could not decide whether these differences are of specific value, or 

 depend on age, variability, or state of preservation ; he therefore 

 referred the specimen provisionally to Eozoon Canadense, regarding 

 it as a young individual, broken from its attachment and imbedded 

 in a sandy calcareous mud. Its discovery afforded him the hope 

 that the comparatively unaltered sediments in which it has been pre- 



