SOUTHEAST WING 



Hall of tiik Ack oi Mammals 

 Fossil Mammals of tiik 'rKitiLxuv Pkhiod 



Ucturn to the East Corridor uiid continue into tlie Southeast Witig 

 or Trrtiarv Hall which contains the I^'ossil Mammals of the Tertiary 

 Period. 



Tlie j2;e()lo^i(tal aji;e to which all the fossils shown in this hall helonj^ 

 covers a ix'riod of from 1()0,()00 to 3,000,000 years. At ea(;h side of the 

 entrance are charts indicating the successive periods of time from the 

 Triassic to the Tertiary, and the animal life which ])ertained to each. 









l^jggl^v^ 



1m 





'liiH 



Jf-^^- m ^ , ^^^^^^H 



^ - 



™ 





■,# 



-••■ 



" ^^^a 



I 



>.. 



^ V' ^ 



Ut'.st oral ion of Kohippus, the four-toi'd horse. Thi.** ancestor of the modern horse, scarcely lartrer 

 than the red fox, lived some three niillions of years ajro. It comes from the Lower Eocene of 

 Wyoming and New Mexico. 



Careful guides and exhaustive cards of ex])lanation. ])h()tographs. and 



window trans])arencies comhine to make the entire exhibit illuminative 



and interest inj>;. 



The particular feature of this hall is the wonderful series in the cases 



by tlie entrance and in the first alcoves on the rijrht showin"; the evolution 

 of the horse in nature. The Museum is justly proud of this 

 collection. Not only is it the larj:;est and finest series of 

 fossil horse skeletons in the world, but it is larger than the 

 combined colhu'tions of all other institutions, and it con- 



Evolution 

 of the 

 Horse 



108 



