THE AMERICAN MUSEUM OF NATURAL HISTORY 



well as those of the well-known race-horse "Sysonby" and 

 the thoroughbred stallion "Nimr." 



In the adjacent wall cases is an interesting osteological 

 exhibit showing how the age of horses is determined 

 through the growth and development of the teeth. 



Beyond the horse exhibit are groups and individual speci- 

 mens of fossil mammals from South America, the most 

 prominent of which is the Giant Ground Sloth Group, - ] 

 and next to it the group of Glyptodons or tortoise-arma- 

 dillos; skeletons of the rhinoceros-like Toxodon, of the 

 camel-like Macrauchenia, the short-legged horse Hippi- 

 dium and of the diminutive ground sloths that formerly 

 lived in Cuba and Patagonia. 



Near-by in the center of the hall is the great sabre-tooth 

 tiger from South America. Numerous specimens of a 

 smaller species of sabre-tooth tiger have recently been 

 found in the asphalt deposits of California. (See the As- 

 phalt Group in the Southeast Wing.) 



At the immediate right of the skeleton of Tyrannosaurus 

 is a number of A-shaped cases containing an exhibit de- 

 signed to show the progress of discovery, especially in the 

 last few years, with regard to the primitive races of man 

 which inhabited Europe during and following the Great Ice 

 Age. To illustrate the successive cultural states, there are 

 reconstructions of the four principal ancestral types of man, 

 i. e., Pithecanthropus or Ape-Man of Java, Eoanthropus or 

 Piltdown Man, the Neanderthal Man (Homo neanderthal- 



21 The Ground Sloth Group— .05. 



Ill 



