358 



THE HORSE 



After 9 years (Plate XXII.) the age must be told by the 

 thickness through in comparison to the width, especially of 

 the two centrals, which become equal in that respect at 



PLATE XXIII. 



Top Jaw at 10 years. 



A. — Groove in corner tooth. 



PLATE XXIV. 

 Toi) Jaw at 15 years. 



about 18 years, and afterwards exceed it ; and by a groove 

 in the face of each upper corner tooth, which begins to 

 show at 10 years (Plate XXIIL), at 15 years will be 



