HISTORY OF THE MUSEUM 
Oligocene (White River), South Dakota, 1892, 1894, 1902. 
Oligocene (White River), Colorado, 1898, 1901. 
Oligocene (White River), Montana, 1902; Wyoming, 1909. 
Miocene, Montana, 1902. 
Miocene (Santa Cruz), Patagonia, 1899. 
Lower Miocene, S. Dakota, 1905-7; Nebraska, 1907-8^ 
Middle Miocene, Colorado, 1898, 1901-2; Nebraska, 1908. 
Upper Miocene, S. Dakota, 1894, 1902-3; Kansas, 1898. 
Upper Miocene, Texas, 1899-1901. 
Lower Pliocene, Nebraska, 1908. 
Middle Pliocene, Texas, 1899-1900. 
Lower Pleistocene, Nebraska, 1893, 1897; Texas, 1899-1901. 
Lower Pleistocene, Arkansas, 1903-4; Alaska, 1907-8. 
Hall 
Collection. 
Cope 
Collection 
of Fossil 
Mammals. 
Cope 
Pampean 
Collection. 
Second, but first in point of time, is the collection of vertebrate 
fossils obtained by Messrs. White and Meek for Professor Hall and 
purchased with the rest of the Hall Collection for the Museum by the 
Trustees in 1878. 
Third, the collection of North American Fossil Mammals brought 
together by Professor E. D. Cope between 1872 and 1890, and pur- 
chased for $32,000 by subscription of Mr. Morris K. Jesup, Mrs. William 
H. Osborn, Messrs. Henry Fairfield Osborn, W. E. Dodge, J. Pierpont 
Morgan, James M. Constable, Theodore A. Havemeyer, D. Willis James, 
John D. Crimmins, Cornelius Vanderbilt, Adrian Iselin, Charles Lanier, 
Frederic B. Church, and an unnamed friend of the Museum. In 
this collection of about 7,000 specimens, is included a great num- 
ber of skeletons and skulls of extinct mammals of the American 
Tertiary formations, some of them unique, and all of great value 
in illustrating the history and evolution of the mammalia in North 
America. 
Fourth, the Cope Pampean Collection, obtained in the Pampean 
Formation of the Argentine Republic by Messrs. Ameghino, I^arroque, 
and Brachet, exhibited at the Paris Exposition of 1878, and pur- 
chased by Professor Cope. It was purchased from his estate for the 
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