AGE, AS INDICATED BY THE TEETH, 



313 



corresponding tooth of the lower jaw, and so may hasten obliteration of 

 the mark. 



Most of these and other causes of irregularity of wear, which might 

 be mentioned, are at once apparent to a careful and accurate observer, 

 and will scarcely prevent his forming a pretty correct opinion of the age. 



The upper incisors, as previously stated, are considerably longer and 

 larger than the lower, and the infundibulum is nearly twice as deep. 

 The marks therefore remain longer than in the lower teeth. This is 

 mentioned in passing, lest the reader should be misled, if he should by 



Fig. 148. 

 Parrot Mouth. 



chance refer to the indications given by the upper teeth to corroborate or 

 correct any opinion as to age, about which he may be in doubt from the 

 appearance of the lower jaw. 



Occasionally the dentine on the side of the infundibulum may become 

 stained and even black, and in such cases something like a double mark 

 may be observed. An instance of this peculiarity is shown in a seven- 

 year old mouth. Figure 149. 



The moucn taKen as a whole is broader at seven year old than at any 

 other period. After this it gradually narrows with age. In this respect 

 General Eitzwygram saya the drawings, taken as a consecutive series, are 

 in some degree at fault, as he found it impossible get mouths of the re- 



