DIGESTION OP FOOD. 



291 



Fig. 343.— The teeth of the pig (Chauvean). 1, upper teeth, table stuface; 2, lower 

 teeth, table aspect; 3, lateral view of jaws. 



21 years. 

 (6 broad incisors.) 



4 years. 

 (8 broad incisors.) 



Over 7 years. 

 (8 broad inciBors.) 



li years. 

 (2 broad incisors.) 



2 months. 

 (MUk-teeth.) 



Fie. 243.— Changes in Incisor teeth of the sheep (Wilckens). 



IJ years. 

 (4 broad incisors.) 



