NORTH 



' 



WEST 



fr- 



FOURTH FLOOR. 



The Mounted Skeleton of Brontosaurus described in this Guide Leaflet is 

 exhibited in Hall No. 407, the Dinosaur Hall, South-East Wing, fourth floor 

 of the Museum. 



PREFATORY NOTE 



The collections in the Dinosaur Hall were gathered together and 

 prepared for exhibition under direction of Professor Henry Fairfield 

 Osborn, Curator of the Department, Vice-President and Trustee of 

 the Museum. They include the Cope Collection of Fossil Reptiles 

 and Amphibians, presented in 1902 by Morris K. Jesup, and the col- 

 lections brought together by Museum Expeditions to the various 

 Rockv Mountain States where the richest localities for such specimens 

 are found. The funds for these expeditions are provided by the 

 generosity of the Trustees of the Museum. 



Besides the general guide to the Collection of Fossil Vertebrates, 

 re-issued in October, 1903, a series of special guides is in course of 

 preparation. Each of these treats of one or more important groups 

 of animals, their evolution, and the various problems and theories 

 illustrated by the specimens in the hall, more fully than could be done 

 in the general guide. Two of these special guides have been pub- 

 lished, one dealing with the evolution of the Horse, the other with the 

 Fossil Carnivores, Marsupials and Small Mammals. A special guide 

 to the Dinosaurs is planned, to be issued in three or more sections, 

 which will be prepared as soon as the collections are more permanently 



and completely installed. 



Editor. 



