360 



THE ANATOMY UF THE HORSE 



Brtwef.x four and a half and five years, the corner nippers are 

 shed, and the tush protrudes through tlie gum. These changes are shown 



in Fit 



At five years the mouth is complete in the number of its teeth ; and 

 from this date it becomes necessary to study their aspect in botli jaws. 

 Fig. 8 shows the upper teeth at this age, by comparing which witli Fig. 7 

 the slight growth in the half-year may be traced. In the lower teeth of the 

 same inouth, the edges of the central cavities are much more worn away, 



Fio. 7.— Morrn or thf Colt at Vcvn asd a Half Years. 



\. Antorior inaxtllary bone. 

 1.1. Central ni]>pers, considerably worn down. 

 2. 2. The next jair, fully di'veloped, with their 



edges slightly worn. 

 8. 8. Comer i>erraanont nijipcrs, in a state oi 



growth, with the edges of tlie cavity 

 sharp, and the mark ver>' plain. 

 4. 4. The tushes showing themselves through 

 the gum, but not full-grown. 



I lie central nipper having only a small blaik speck in the middle of a smooth 

 surface, while the next is much worn, and the corner teeth, though showing 

 the mark very plainly, bear evidence of having been used. The tush is 

 much grown, with its outer surface regularly convex, and its inner concave, 

 the edges being sharp and well defined. The sixth molar is at its full 

 growth, and the third is shed to make room for tlie permanent tooth in its 

 place. These two hist-named teeth should always be examined in cases 

 where there is any doubt about the age. After five years, no further 

 shedding occurs in any of the teeth. 



The six-year-old mouth is the last upon which any great reliance can be 



