VERTEBRATES 157 



25. Seasonal variation in color. 



26. Distribution and habits of the ferrets and weasels. 



27. How carnivora protect themselves from enemies. 

 Which carnivora have been most successful in resisting 

 man's advance .' 



28. Peculiar and interesting carnivora to be seen in 

 museums and zoological gardens. 



29. Origin of the domestic dog. 



30. Intelligence of dogs. 



31. Fox-hunting. 



32. Coyotes and their relation to stock raising, etc. 



The Ungulates 

 Materials. 



Pictures, charts, lantern slides, and books showing cow, 

 sheep, hog, goat, horse, etc. Diagram of skeleton. 



Directions. 



Since it is impossible to have living ungulates in the 

 laboratory, this study should be supplemented by trips to a 

 museum and to a zoological garden. Observe also such 

 hoofed animals as may be common in your neighborhood. 

 Use your camera and make " snapshots," showing charac- 

 teristic attitudes of these animals. 



Definitions. 



Ungulates, an order of mammals characterized by the 

 possession of hoofs. 



Ruminant, a division of ungulates, which " chew the 

 cud." 



Perissodactyl, a division of ungulates with an odd num- 

 ber 9f toes. 



Artiodactyl, a division of ungulates with an even num- 

 ber of toes. 



