Fig. 20. 









o 



Fig. 20. — Dental Battery of the Horse. 



In the'=!e three skulls the honir wfjll ha"^= heen reraoverl to 

 shov' the location of the teeth. The raiflr'ie fi^i.re represents 

 the youngest rnimal, f horse five years olri, in which the 

 cro'vns of the teeth are very long find the roots beginning to 

 develop. The upper picture represents the skiill o^ a horse 

 eio:ht j'-ears olcl, in "^hioh t>ie roots ha'^e grown longer 'vhile 

 the crowns hpve been reduced by wear. The lower figure re_ 

 oresents the skull of an extre-niely old horse, twenty?-- seven 

 years old, in which the cowns ^r'e almost' entirely worn away 

 and the roots hai^e beco.'tie ^evir long, I-larked ohsnges are also 

 observdd in t?ie jaw. 



