SIX YEARS. 



95 



Six Years (Figs. 86, 87, 88). — In front, the teeth appear much as 

 they were at five years of age. In profile, we see in this animal a more 

 tardy eruption of the tush teeth, which are not j^et quite free from the 

 gums, and are, therefore, of little value as regards the age. The tables 

 furnish a most accurate guide ; the posterior border of both inferior and 

 superior corner teeth are worn ; the pincher teeth are leveled and their 

 tables tend to an oval form. It is seen, however, that the inferior cups 

 are thicker at their anterior borders, — due to a small portion of the sur- 

 face enamel still remaining. The cups are narrower from side to side 

 than at five years, and somewhat closer to the posterior border of the 

 table ; the same appears on the intermediate teeth. It will be noticed 

 that the cups of the superior corner teeth have fissures on their poste- 

 rior borders, which is of frequent occurrence and does not interfere with 

 judging the amount of work Mhich they have performed. 



