194 THE TEETH 



dividers are oval in shape, and the cups have become decidedly 

 narrow. The nippers show a well-defined dark streak just in 

 front of the cups. This is the beginning of the dental star. 



Nine Years. — The appearance of the table surface is more 

 characteristic at this time than the previous year. The cups are 

 less prominent and the plainness or smoothness of the inferior 

 table is more noticeable. The nippers are round, the cups tri- 

 angular and the dark streak narrower and more distinct than the 

 previous year. The dividers are becoming round and the corner 

 teeth are oval. 



Ten Years. — The teeth are more oblique than in the eight- 

 year-old and nine-year-old mouth. The table surfaces of the 

 inferior nippers are decidedly rounded, the cups are small, 

 triangular and situated well toward the posterior borders. The 

 dark brown streak or dental star is situated in the central portion 

 of the nippers and dividers. The tables of the dividers are 

 round. 



Eleven Years. — The tables of the corner teeth are rounded. 

 The dark streak or dental star is present in all of the teeth, and 

 the remnants of the cups appear as small rings or spots of enamel 

 near to the posterior borders of the tables. The notch in the 

 superior corners may reappear at this time. 



Twelve Years. — The profile of the teeth when viewed from 

 the side is quite oblique. The table surfaces of all the incisors 

 ai'e round. But a trace of the cup renuiins in the inferior 

 incisors. The head of the animal is beginning to show age. 

 The inferior border of the jaw bone appears narrower, or sharper 

 than in the young horse. 



Thirteen Years. — All of the specks of enamel or the rem- 

 nants of the cups are gone from the lowel" incisors. A larger 

 notch may be j)rcscnt in the upper corner teeth than at twelve. 

 The tables of the inferior ni])pers are becoming triangular and 

 show a small, dark spot or dental star. 



Fourteen Years. — The tables of the inferior nippers are 



