Dr. ToLMACHEV, former curator of the Geological Museum of 

 the Academy of Sciences, Leningrad, has devoted himself mainly to 

 the geology of Arctic Eurasia. In 1905 he was leader of the Khatanga 

 expedition of the Russian Geographical Society, on which valuable 

 information was obtained regarding the drainage and geology of 

 the Khatanga region (see "Addition to the Geographical and Geo- 

 logical Map in the Region Visited by the Khatanga Expedition in 

 the Year 1905" [in Russian] (Izv. Imp. Russ. Geogr. Obshchestva, 

 Vol. 48, 1912, Petrograd, 1915); "New Data on the Geography of 

 Northern Siberia" [in Russian] (Izv. Imp. Akad. Nauk, Ser. 6, Vol. 

 4, St. Petersburg, 1910). In 1909 he led an expedition to explore the 

 Arctic coast of Siberia from the mouth of the Kolyma to Bering 

 Strait. On this expedition he has published "Along the Chukchi 

 Coast of the Arctic Sea: Preliminary Report of the Director of the 

 Expedition for the Exploration of the Coast of the Arctic Sea from 

 the Mouth of the Kolyma to Bering Strait, Organized in 1909 by 

 the Merchant Marine Section of the Ministry of Commerce and 

 Industry" [in Russian], St. Petersburg, 1911. He is also the author 

 of the section on geology in "Aziatskaya Rossiya" [in Russian], 

 St. Petersburg, 1914, and "The Geology of Wrangel and Herald 

 Islands" [in Russian] {Izv. Imp. Akad. Nauk., Ser. 6, Vol. 6, 1912). 

 From 1914 to 1919 Dr. Tolmachev was secretary of the Permanent 

 Polar Commission of the Russian Academy of Sciences and in 1919 

 president of a commission for the investigation and practical util- 

 ization of the Russian North. He is now on the staff of the Carnegie 

 Museum of Pittsburgh and a member of the faculty of the Uni- 

 versity of Pittsburgh. 



