DENTITION OF HORSES, 405 



surrounded by a line of worn structure; only the anterior 

 edges of the teeth have yet been subject to attrition. In 

 the lateral incisors the wear is confined to a small portion of 

 the anterior edge which is nearest to the central teeth. 

 These appearances are indicated in Fig. 4. 



Between two and six months old the central and lateral 

 incisors increase in size with the growth of the animal. At 

 six months old the mouth has a very neat and compact ap- 

 pearance. The centrals and laterals are well developed, and 

 their anterior edges are worn level. The posterior edges 



FIG. 1. INCISORS OF FOAL AT BIRTH. 



are, however, still rather below the anterior, and the table, 

 therefore, is not perfectly formed. Fig. 3 was taken from 

 the mouth of a cart colt at the age of six months. 



Soon after seven months indications of the cutting of the 

 corner teeth may often be seen, and in many instances the 

 points of the teeth will be observed pricking through the 

 gum. At nine months old the colt will have the corner in- 

 cisors in the mouth with their extreme anterior edges in ap- 

 position, leaving a triangular space, which is seen most per- 

 fectly on a side view when the lips are slightly separated. 



