Vol. 70.] Ay^TIYERSARY ADDRESS OF THE PRESIDENT, lxiii 



papers of which I have record were published in 1883. They 

 contained an account of a meteorite which fell at Saratov in 1882, 

 and the first instalment of his work on the Silurian and Devonian 

 strata in the Southern Urals. 



In 1885 he was engaged in Central Russia on the Permian rocks 

 of the province of Kostroma, but five years later he was connected 

 with work in progress in the far north. In the region of the 

 Timan Mountains, he noted the occurrence of ciystalline rocks, 

 and of schists closely allied to Silurian and Devonian strata. Here 

 also he identified Upper Devonian with abundant small Crustacea, 

 Carboniferous, Callovian, Kimeridgian, Neoeomian, and post- 

 Pliocene deposits. In 1892 his attention was drawn at Kanine, 

 one of the northernmost points of Siberia, to the evidences of a 

 passage of crystalline schists into unaltered sediments through the 

 action of chemical and mechanical metamorphism. 



At this time he was studying also the glacial phenomena exhibited 

 in Northern Russia, and especially those of the Ural Mountains. 

 He concluded that the Polar Sea must have been united with the 

 Baltic on the one side and the Caspian on the other, and had 

 obliterated such morainic deposits as had been left by the ice-sheet. 

 No traces of Palaeolithic Man, contemporaneous with the Mammoth, 

 were discoverable. 



Southern and Central Russia formed the scene of his labours in 

 1893. In the Altai Mountains, on the borders of the Chinese 

 Empire, he studied a Devonian fauna, and compared it with that of 

 the Coblenzian type of the Rhine district. The Carboniferous rocks 

 of the Donetz were shown by him to present a sequence similar to 

 that of other parts of the Empire, and to have been deposited in a 

 gulf of the great Russian Carboniferous basin. 



In the Ural Mountains his work was of far-reaching importance, 

 especially as regards the Silurian, Devonian, Carboniferous, and 

 Permian faunas. In the Eastern Ural he described or enumerated 

 a large number of fossils from the Devonian, and recognized the 

 existence of two assemblages which he compared respectively with 

 the Hercjmian and Coblenzian faunas. His work on the Devonian 

 rocks is published in detail in the 'Memoirs of the Russian 

 Geological Survey ' vols, i & iii. 



In 1896, reporting on an expedition to Novaya Zemlya, he 

 described briefly a southern mountain-range composed of upturned 

 Devonian rocks and a central plain underlain by the Artinskian 

 Sandstone of Lower Permian age. In 1907 he published an 



