192 



CATrLE. 



that the alveoli, or cells for the teeth, may be exposed. The second 

 pair of incisors have almost attained their proper size, but not 

 their proper form. The third pair are getting ready, but the jaw- 

 is not yet sufficiently widened for the development of the fourth 

 pair. 



EIQHTEEK MONTHS. 



TWO YEARS PAST. 



The process of absorption will still be suspended with regard to 

 the two outside pairs of milk teeth, but will be rapid with regard 

 to the second pair, and a little after the commencement of the 

 second year they will disappear. The cut represents the two year 

 old beast, with four permanent incisors and four milk teeth. 



Now the remaining milk teeth will diminish very fast, but show 

 no disposition to give way, and at three years old there will be six 

 permanent incisors, and often apparently no milk teeth ; but if the 

 mouth is examined, the tooth that should have disappeared, and the 

 tooth that is to remain until the next year, are huddled together and 

 concealed behind the new permanent tooth. They are often a source 

 of annoyance to the animal ; and the tooth whose turn it was to go 

 must be drawn. The three year old mouth then, as represented in 

 this cut, should contain six permanent incisors and two milk teeth. 



At the commencement of the fourth year, the eight permanent in- 

 cisors will be up ; but the corner ones will be small. The cut 

 gives a four year old mouth, or perhaps one a month or two after 

 four years ; so that the beast cannot be said to he full-mouthed, i. e., 



