ir.Wi'/.'/vA M.\sr<)i)()\ 107 



\o\vv will also 1)(' interest (m1 in the ostcolo^ical collections in the \v;ill 

 crises whieh show how to tell the ;i,i2;e of horses throujih the «iro\vth iind 

 (levi^lopnient of the teeth. 



I^eyond the Horse exhibit on the left are fossils from South AnHjriea, 

 the most striking of whieh is the ^.roup of ^ijint ground 

 Fossil sloths. There are also s<>^tl exani])les of the (llyptodou, 



Mammals of .^ oijrantie relative of the armadillo, of the camel-like 

 . Macrauchenia, the rhinoceros-like Toxodon, and other 



strange extinct animals which evolved in South America 

 during the Age of Mammals, when it was an island continent, as Aus- 

 tralia is to-day. Here, too, is the great sabre-tooth tiger, one of the 

 host of northern animals that invaded the southern continent upon its 

 union with the northern world, and sw^ept before them to extinction 

 most of its ancient inhabitants. 



In the center of the hall is a skeleton of the giant carnivorous dinosaur 

 Tyrannosaurus excluded from Dinosaur Hall for lack of space To the 

 right is a small collection of fossil remains of man illustrating what is 

 known of the prehistoric record of our own race. 



The principal exhibits on the north side of the hall are the mammoths 



and mastodons and the series of skulls showing the evolution of the 



elephant. The "Warren Mastodon" is a classic specimen. It was 



found near Newburg, N. Y., in 1846, and is the finest 



•«ir*^^^ specimen of its kind that has ever been discovered. Next 



Mastodon .. „ ,, >> ^ ^ c ^ • 



to it is a fine skeleton oi the mammoth ; portions oi skm, 



hair and other fragments of a mammoth carcass discovered in Alaska 



are also shown. While modern elephants are confined to portions of 



Asia and Africa, fossil remains of elephants and mastodons show^ that, 



at one time or another in the past, they were found over the greater 



part of the northern hemisphere. 



The skeleton of an African elephant, the once famous Jumbo, 



w^hose name has been embodied in the Enghsh language as a term for 



anything unusually large, is shown for comparison wdth 



its extinct relatives. 

 [See Handbook No. 4, Animals of the Past, and Guide Leaflet No. 43, 

 Mammoths and Mastodons.] 



