1 ()(J 



AGE OF THE DOMESTIC ANIMALS. 



The crowns of the permanent pinchers, in this month, have 

 not become quite free from the gums ; the left-hand tooth is 

 somewhat in advance of the other, and its enamel just shows 

 traces of use. 



Fig. 163. 

 Two years, nine months, a, external face. 6, internal face. 



Two Years^ Six Months. — Between two and one-quarter 

 years to two years and nine months the first permanent interme- 

 diate teeth have accomplished their eruption. (Fig. 163.) 



In this mouth the crowns of the first intermediate teeth 

 are free from the gums, and the root of the second inter- 

 mediate (temporary) is pressed on and its position slightly 

 displaced. 



