110 



may be placed in ordinary signs, since the infundi- 

 bulum of the lateral nipper shows a well-marked 

 cavity, while from the other teeth it seems to be 

 upon the eve of disappearing. On inspection, how- 

 ever, it will be seen that in figures the tables 

 approach more towards the square, which is the last 

 form these surfaces assume. 



53. At twelve years old, there may be tartar on 

 the lower tush. The teeth are longer, narrower, and 

 the enamel darker. The coloured engraving, which 

 was, on the last occasion justified by a comparison 

 with the mouth of that famous horse, Charles the 

 Twelfth, will convey a general idea of the prevailing 

 characteristics of this age. The teeth have lost the 

 white and firm set aspect they bore at the eighth year. 

 Often, at this period, they have, by wear, become 

 irregular generally, as exhibited in the plate; the 

 grooves, extending down the length of the upper 

 incisors, contain the remnants of the crusta petrosa, 



