lxiv PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April IQ. 1 4, 



account of the discovery of Upper Trias in the Caucasus. He was 

 a member of the Russo- Swedish Expedition to Spitsbergen. 



Tschernyschew's work lay, for the most part, in remote and 

 little-known parts of the world. While following in the footsteps 

 of Murchison, De Verneuil, Keyserling, and Karpinsky, he may 

 himself be regarded as one of the pioneers of European geolog}', 

 for he traced the geological formations with which we are familiar, 

 and identified their characteristic fossils, in the uttermost parts of 

 the Continent, beyond the regions where they were known, or 

 might even have been expected to occur. 



His was a popular name abroad, as well as in Russia. To his 

 energy the Seventh International Geological Congress, held at 

 St. Petersburg in 1897, owed much of its success, and as a frequent 

 attendant at subsequent Congresses it fell to him to take an 

 important part in many international scientific enterprises, such as 

 the Geological Map of Europe, the Geological Map of the World, 

 and others. 



Many scientific societies or institutions claimed Tschernyschew 

 as either honorary or ordinary member, and the Universities of 

 Marburg, Geneva, Christiania, Greifswald, and Toronto, conferred 

 upon him the degree of Doctor honoris causa. He was elected a 

 Foreign Member of our Society in 1909. 



Tschernyschew was a welcome participator in the Twelfth Inter- 

 national Congress, held at Toronto last August, and took an active 

 part in the proceedings. No sign of failing health was then apparent, 

 and his sudden death on January 15th, 1914, came as a shock to a 

 wide circle of friends. 



The death of Credner, who was elected a Foreign Member of this 

 Society in 1898, has speedily followed upon that of Zirkel, his 

 fellow-professor in the University of Leipzig — their teaching 

 associateship having commenced as far back as the year 1870. 



Geheimrath Hermann Credner was the eldest of four sons of 

 Heinrich Credner, a well-known geologist and mineralogist, who 

 was a mining official, first in the Kingdom of Hanover, and after 

 1870 under the Imperial German Government. Born in 1841 at 

 Gotha, the younger Credner was educated at the Clausthal Mining 

 School and the Universities of Breslau and Gottingen. His earliest 

 studies were devoted to the rocks and fossils of Gault and Neo- 

 comian age in Hanover, and the writer of this notice recalls with 

 gratitude the friendly assistance received by him, when on a geo- 

 logical tour, from his German fellow-student. In 1864, however, 



