10 Feb., 1919.] 



Ageing of Horses. 



101 



teetli are upright and meet each other squarely; the upper corner teeth 

 projecting slightly beyond the lower corners at the posterior edge. 



From six years onwards the changes are as follow:— The marks get 

 rounder and smaller, and when the horse is about ten years' old may 



Plate VI.— At six years old. 



Plate VII. — At seven years of age. 



disappear from the central teeth; on some teeth, however, they persist 

 for much longer periods. 



At seven years the corner incisors indicate a considerable amount 

 of wear and the upper corner incisor shows a distinct notch or small 

 rounded projection at the posterior edg^ (see Plate VII.). 



