DENTITION OF HORSES. 407 



happens that at the age of two years another molar, the fifth 

 in situation, is in the mouth, and may be at once distin- 

 guished by its recent appearance. Soon after eighteen 

 months the fifth molar begins to protrude through the gum, 

 and by the termination of the second year is level with the 

 other molars, so that any doubt which may remain after an 

 inspection of the incisors may be settled by reference to the 

 condition of the molars. 



Figs. 5 and 6 are of foal's molar teeth at one year and at 

 two years. It will be observed in Fig. 5 that the surfaces of 

 four molars are worn level, while points of the new tooth, 



FIG. 3. INCISORS OF FOAL AT SIX MONTHS. 



the fifth in position, are rounded, excepting a small portion 

 at the inner side of the tooth, which shows the effects of 

 attrition, but only to a slight extent. 



The incisor teeth at two years of age have their tables 

 perfectly formed as a rule; -but in some instances the corner 

 teeth, although they have lost their shell-like character, 

 still have a portion of their posterior edge untouched, as 

 shown in the illustration of the mouth of a two-year-old 

 filly (Fig. 7). 



Between two and three years of age the central temporary 

 incisors of the horse are changed for permanent teeth, and 



