84 . NATURE STUDY. 



showing canine teeth, can be obtained. Relate pecu- 

 liarities of structure to habits. 



Gather from pupils, and write on the blackboard, a 

 table such as the following : 



Gnawing Animals or t Flesh-Eating or Carnivorous 



Rodents Animals 



Have four long chisel-shaped Have many (twelve) small in- 



incisor teeth. cisor teeth. 



Have no canine teeth. Have four long pointed canine 



teeth. 

 Have flat-topped grinding teeth. Have grinding teeth with tops 



having points. 

 Gnaw and grind their food. Tear and grind their food. 



Rabbit, hare, rat, mouse, squir- Cat, dog, fox, wolf, lion, tiger, 

 rel, woodchuck. skunk, wildcat, leopard, bear. 



All have a bony skeleton and backbone, and are 

 covered with fur. 



STEP 2. Comparison of rabbit with chicken and fish. 



These are selected because most children have dis- 

 covered, when eating them, that they have a bony 

 skeleton and backbone. 



Chicken. Like rabbit in having bony skeleton and 

 backbone. Different from rabbit and all the other 

 animals studied in having two legs, a pair of wings, 

 a hard mouth or bill, and in being covered with 

 feathers. 



Fish. Like rabbit in having bony skeleton and 

 backbone. Differs from all animals already studied 

 in having no legs, swimming in the water with its fins 



