49 



foal's tooth it more or less approaches to a semi-circle, 

 from which the permanent teeth greatly differ, as 

 will be seen by comparing the representations of the 

 two as given in the plates. The outer surface like- 

 wise is characterized by peculiar indentations : a 

 number of small channels run along it, taking 

 a course from the neck towards the margin of the 

 table, and giving an irregular fluted appearance to 

 the enamel. There will be seen, on the crown of 

 Figure 2, lines intended to convey an idea of the 

 situation and direction of these little grooves. The 

 table is always oblong, but the infundibula are gene- 

 rally absent after the second year, and when they are 

 present, the cavities are narrow, and obviously of 

 little depth. These numerous signs enable the milk 

 tooth to be recognized with facility, at a single 

 glance, for it is seldom that one of the various 

 indications is absent; and after all have been im- 

 pressed by observation, the milk tooth can hardly be 

 mistaken. 



26. The permanent incisors are indicated by their 

 greater size, a circumstance which the foregoing 

 wood-cut does not exaggerate. The gum is much 



E 



