PLATE XII. 



A. REPRESENTS the front teeth of the lower jaw 



of a colt until two years and a half old. 



B. The lower jaw at two years and a half old, in 



which the two middle teeth have been shed. 



C. Two new middle teeth, the two adjacent teeth shed. 



D. Eour new teeth, the two corner teeth shed. 



E. The set of new teeth complete, the marks of the 



two middle teeth being filled up. 



F. The marks of the four front teeth filled up. 



G. The front teeth in the upper jaw, the two middle 



teeth having their cavities filled up. 



H, Ditto, the marks of the four front teeth being 

 filled up. 



I. Ditto, the marks of all the teeth effaced. 



K, Profile view of the mouth of a young horse. 



L. Ditto of the mouth of an old horse. 



