Extinct Vertebrates 87 



these, save the carnivorous dinosaur, belong to the group 

 known as duck-billed dinosaurs, of which until a few years ago 

 only a single kind was known. 



The skeleton of the giant Tyrannosaurus has been removed 

 from its temporary place in the Hall of the Age of Man and 

 installed in the Dinosaur Hall, where it properly belongs. 



The skeleton of the clawed ungulate Moropus has been 



mounted and placed in the center of the Tertiary Mammal 



Hall. This is a remarkably fine skeleton of 

 Moropus Skeleton . ■, , «,« " t 



a very curious and hitherto very rare animal. 



Others will be added later to form a group. 



The fossil camel alcove has been revised and improved by 

 the addition of a series of skulls and partial skeletons illus- 

 trating the evolution of this family in North 

 America and its later migration to the Old World 

 and to South America, where the camels and llamas still sur- 

 vive although they have become extinct in their old home. 



In the Hall of the Age of Man, the skeleton of a glyptodont 



or tortoise armadillo Lomaphorus has been added to the series 



of extinct animals of South America. It is an 



Skeleton of a interesting example of the great changes in the 



Glyptodont . ° r & . & 



internal framework of these animals resulting 

 from the massive turtle-like shell that covered them, and from 

 their peculiar habits of life. 



The most attractive feature of this hall will be the series of 

 fine mural paintings by Mr. Charles R. Knight, gift of Mr. 

 . J. P. Morgan. The first of these has been com- 



pleted, representing a Pleistocene Life Scene of 

 northern Europe, contemporary with prehistoric man. The 

 animals shown, mammoth and reindeer, are especially charac- 

 teristic of the Glacial Period of Europe, and are represented in 

 the arctic environment to which they were adapted. A second 

 mural, representing a Pleistocene Life Scene in North Amer- 

 ica, is well advanced. It shows in their natural surroundings 

 the great American Mastodon, the extinct long-horned bison 



