XXXVl PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



Society, and containing a list of all the works and memoirs that 

 treat especially of the particular group." This important work 

 has unfortunately never been completed, but such portions of it 

 as were finished were compiled by his own hand or under his im- 

 mediate inspection. He also undertook, with the assistance of 

 Mr. Morris, to prepare an illustrated copy of that gentleman's 

 Catalogue of British Fossils, and of this work also a considerable 

 portion was completed by Mr. Horner. 



This Address is also remarkable for the able summary it gives 

 of Sir Roderick Murchison's valuable work on the Greology of 

 Russia, then recently published, and this is done both directly and 

 indirectly; for after giving a general sketch of the geology of 

 Russia as described by Sir R. Murchison, Mr. Horner proceeds 

 to offer some remarks on the recent discoveries in the several 

 great groujDs of formations, beginning with the lowest fossiliferous 

 deposits ; and he then institutes a careful comparison between the 

 recent discoveries in Russian geology, extending over so vast a 

 tract of country, and what was already known respecting the rest 

 of Europe, illustrating the one by the other, and showing how 

 the phenomena observed by Sir R. Murchison and his companions. 

 Count Keyserling and M. de Verneuil, in Russia, had tended to 

 solve many problems hitherto scarcely understood in European 

 geology. This was particularly the case with regard to the Per- 

 mian system, which, as the result of this investigation, became 

 permanently separated from the overlying Trias, constituting a 

 separate zoological system, comprehending the Lower New Red 

 Sandstone, our Magnesian Limestone, and the sandstones and 

 conglomerates that constitute the lower member of the Bunter 

 Sandstein of the Grermans. At the same time, while it contains 

 some animal and vegetable remains of the Carboniferous series, 

 and is thus connected with the true Palaeozoic rocks, it contains 

 a peculiar fauna and flora of its own, thus forming a distinct 

 system between the Carboniferous and Triassic systems. 



There are many other portions of this Address well deserving 

 of notice even in the present day, particularly the account of the 

 different theories of the formation of coal, and the observations 

 on the Boulder formation, the northern drift, and the erratic 

 blocks. 



Mr. Horner delivered his second Address on the 19th of Eebru- 

 ary, 1847 ; in it he principally dwells on the recent additions to 

 the knowledge of the Tertiary and more modern formations, and 

 on terrestrial changes now in progress, to which of late years the 

 attention of geologists had been more particularly directed. On 

 this occasion he also reviewed, at considerable length, the Essay 

 of Prof. Edward Forbes on the connexion between the distribu- 

 tion of the existing Fauna and Flora of the British Isles, and the 

 geological changes which have affected their area, especially during 

 the epoch of the Northern drift. 



It was during this same year that Mr. Horner took an active 

 part in bringing about certain changes in the management of the 



