THE AMERICAN MUSEUM OF NATURAL HISTORY 



to a diagrammatic representation of the later geologic 

 periods — Tertiary and Quaternary — indicating the time in 

 the world's history at which the given family probably 

 originated. The visitor should examine first the wall case 

 on the left containing specimens illustrating the Characters 

 and Evolutionary Rank of Mammals and follow the series 

 around the room. It has been so arranged as to present in 

 graphic form the past history and development of the prin- 

 cipal divisions. 



In another part of the hall is a life-size model of a sul- 

 phurbottom whale seventy-six feet in length. Attached to 

 one of the pillars may be seen a model of a whale's head 

 showing the whalebone, which takes the place of teeth and 

 hangs in great plates from the inside of the upper jaw. 

 Suspended from the ceiling are models of other whalebone 

 whales and of the toothed sperm whale, and skeletons of 

 smaller whales. 



Circling the hall is a marine mural frieze which serves as 

 a background for models of porpoises, dolphins and other 

 members of the whale family. 



In the railing cases are exhibits which give the visitor a 

 general view of the enormous Class of Insects. There is 

 a special exhibit of the Butterflies 14 Found Near New York 

 City, another of the "Moths of the Limberlost" and one of 

 the Plant Galls Caused by Insects. 



14 Our Common Butterflies— .15. 



69 



