12 



HOMOLOGIES OF THE HUMAN TEETH. 



termination of the exact homologies of the teeth, it is 

 satisfactory to know that the more constant and important 

 character of development gives the requisite certitude as 

 to the nature of the so-called bicuspids in the human sub- 

 ject. In Fig. 76, the condition of the teeth is shown in 



Fig. 7G. 



DECIDUOUS AND PERMANENT TEETH, HUMAN, .ET. 7. 



the jaws of a child of about six years of age. The two 

 incisors on each side, c?, z, are followed by a canine, c, and 

 this by three molar teeth like those of the adult ; in fact, 

 the last of the three, m, is the first of the permanent 

 molars; it has pushed through the gum, like the two 

 molars which are in advance of it, without displacing any 

 previous tooth, and the substance of the jaw contains no 

 germ of any tooth destined to displace it; it is, therefore, 



