Report of the President 45 



covered. In Cuba he secured jointly with the Havana Acad- 

 emy of Sciences a large collection of fossil vertebrates, of 

 peculiar interest since practically nothing has been known 

 hitherto of the extinct animals of the West Indies. During 

 the summer he continued the search for Cretaceous Dinosaurs 

 on the Red Deer River, Alberta, and collected a series of fine 

 specimens, of which the most important are a complete skele- 

 ton of a new Duck-billed Dinosaur, skulls of Carnivorous and 

 Armored Dinosaurs, and several partial skeletons of new or 

 little known types. 



Mr. Granger continued work in the Big Horn Valley, 

 Wyoming, and added a large collection of the fossil mammals 

 of the Lower Eocene to those obtained by former expeditions. 



Through the courtesy of Mr. Harold J. Cook of Agate, 

 Nebraska, the Museum party in charge of Mr. Thomson 

 opened up a section of the great fossil quarry at that locality, 

 and obtained a skull and other parts of the ''Giant Pig" 

 Dinohyus, seventy-five skulls of the Pair-horned Rhinoceros, 

 and other material. 



Exchanges with the Museums of Basel and Vienna, the 

 British Museum and Yale University Museum have also 

 enriched our collections with specimens and casts, chiefly of 

 European fossils. 



In the exhibition halls, the most important changes are 

 the transfer of the Proboscideans and South American mam- 

 mals to the new Quaternary Hall, formerly the Mineral Hall, 

 and the rearrangement of the remaining fossil mammals 

 in the Tertiary Mammal Hall. A new method of installation 

 for wall-case exhibits has been adopted, the specimens being 

 mounted on vertical panels adjustable to the necessary depth 

 in the case, the shelves, racks and visible mountings being 

 eliminated as far as possible so as to concentrate attention on 

 the specimen and label. The exhibit showing the Evolution 

 of the Horse has been reinstalled in this way and considerably 

 extended in its scope. The reinstallation of the Amblypoda 

 alcove is in progress, and other alcoves will be taken up in 

 their turn. 



The exhibit of South American Fossil Mammals is in 

 large part new, the most important additions being the group 



