TEETH. 



145 



sented by the character of the head, when compared with the image 

 which immediately preceded the last illustration. The face has per- 

 ceptibly lengthened ; for by this time a second permanent molar, making 

 five grinders on both sides of the upper and of the lower jaws, has broken 

 through the fleshy covering of the gums. Preparation is also being 

 made for the advent of the sixth grinder, and for changes in those milk 

 molars which were in the mouth when the animal was bom. At the 

 same time, additional width is imperative to allow the permanent inci- 

 sors to appear When the proper season arrives for these last organs to 

 displace their temporary representatives. 



JAW AT TWO TEABS OU). 



Should the front teeth of a two-year old mouth be examined, there 

 will be perceived a want, of that fixedness which, one year before, was 



THE INOIEOB TESTE AT TWO T£AS8 OLD. 



the characteristic of these organs. The central nippers appear to have 

 done their duty, or, at all events, suggest something approaching to 

 maturity has, during their brief existences, been attained. It will 



10 



