346 VETERINARY DENTAL SURGERT. 



rounded. These- cavities are nearer the posterior 

 than the anterior edge of the tooth. The depression 

 on the internal surface of the tusks is yet well de- 

 fined. 



At seven years the table surface of the corner 

 teeth are perfectly formed and the cavity in the 

 tooth very shallow. The central enamel is eliptical 

 and nearer the posterior than the anterior border of 

 the tooth. The cavities of the lateral incisors are 

 oval and nearly worn out of the tooth. In the cen- 

 tral incisor the central enamel is triangular. The 

 tusks are somewhat worn, giving them a blunted 

 appearance. 



At eight years the central enamel of the central 

 incisors is triangular in form and near the posterior 

 border. The table surface also begins to narrow 

 from side to side. The central enamel of the lateral 

 incisors is triangular and the cavity nearly obliter- 

 ated. 



At nine years the central enamel of the central 

 incisor teeth is round and near the posterior border. 

 The lateral incisors have the central enamel oval and 

 near the posterior border. That of the corner is tri- 

 angular and the cavity nearly obliterated by wear. 



After the ninth year the age of the horse can not 

 be accurately determined, but there are general ap- 

 pearances which will assist in arriving at the approx- 

 imate age of the animal. 



