176 ON THE ACE OF THE HORSE, 



meet exactly in a line, and perpendicularly to 

 each other. Vide fig. K. As the horse grows 

 older, these teeth take a more horizontal diiec- 

 tion, nearly in a line with the jaws, the upper 

 teeth projecting very considerably over the lower 

 teeth ; at the same time the upper corner tooth 

 forms a curve over the lower corner tooth. Vide 

 Jig. L. Furrows appear on their front surfaces, and 

 their colour becomes yellow and opaque. Other 

 characteristics of age may be seen externally, 

 for instance, the eyes sink in their orbits, the 

 eye-lids become lean and wrinkled, and the ca- 

 vity above the eye* appears more hollow. Grey 

 hairs shoot out upon the forehead and the lower 

 part of the mouth, the middle of the nose be- 

 comes indented by the long-continued pressure 

 of the nose-band of the head-collar, and the lips 

 exhibit a lean and shrivelled appearance, the 

 lower lip hanging considerably below the upper 



* This cavity, liowever, is sometimes deep in a young 

 horse. 



lip. 



