52 JROCEEDIXGrS OF THE GEOLO&ICAL SOCIETY. 



related to the controvers}' concerning the occurrence of human 

 remains with extinct animals. He was elected a Poreign Member 

 of our Societ}^ in 1864, but since that time does not appear to have 

 taken any active part in Geological research. He died last year, at 

 Xogent-le-Eotrou, at the advanced age of 80. 



Dr. Feedixaxd Yaxdeveek Hatde>^ was born at Westfield, Mass., 

 Sept. 7, 1829, but spent the earlier years of his life in the State of 

 Ohio. He studied for some time at Albany, X.Y., where he obtained 

 his medical degree in 1853, and having attracted the notice of Pro- 

 fessor James Hall, was induced to accompany Mr. F. B. Meek in an 

 exploration of " the Bad Lands " of Nebraska, their object being to 

 examine an almost unknown tract of country and to collect and 

 study the fossils which were reported to occur there. During two 

 foUowing years Hayden revisited Nebraska and extended his 

 explorations to Kansas ; the vertebrate fossils which he collected 

 were among those studied by Dr. Leidy, and served to call general 

 attention to the palseontological wealth of the Par West. 



In the year 1856 Dr. Hayden commenced that series of investiga- 

 tions of the Western Territories, under the auspices of the United 

 States Government, which have resulted in such important and 

 valuable additions to our knowledge of the geological structure of 

 those interesting regions. 



Tear after year, except during the period of the Great War, when 

 he became an army surgeon, Dr. Hayden returned to different parts 

 of the Western Territories for the purposes of exploration. In 1867 

 he was appointed Geologist-in- Charge of the United States Geo- 

 logical and Geographical Survey of the Territories. The result of 

 his twelve years of labour as an administrator are seen in a series 

 of splendid volumes in which not only the Geology and Palaeonto- 

 logy, but the Xatural History, Topography, Ethnology, and 

 Economics of those hitherto inaccessible regions were made known 

 to the world. His services to the cause of our science were 

 recognized by Dr. Hayden's election as a Poreign Correspondent of 

 this Society in 1875, and as a Poreign Member in 1879. 



Upon the establishment of the United States Geological Survey, 

 Dr. Hayden was nominated as one of the Geologists, and in that 

 capacity continued to superintend the publication of the results of 

 his former surveys, and, so far as was possible, to inaugurate new 

 investigations. 



During the last few years, however, Dr. Hayden's numerous 



