392 
Dentition as indicative of the Age 
It will be observed that the temporary tooth is much smaller 
than the permanent organ, which is placed on the left hand, 
and also that the distinction between the upper part of the 
tooth or crown and the fang is much more marked in the milk- 
tooth. In fact the permanent incisor does not indicate any 
actual line of separation between the upper and lower portions. 
Both figures are full size. 
The next illustration (Fig. 2) shows a perfectly formed 
central permanent incisor. Ail the parts of the tooth which 
the expert is required to note carefully are clearly defined in 
this figure. 
Fig. 2.- Permanent Incisors (Horse). 
In the first place attention is directed to the upper surface of 
the crown of the incisor, which is described as the table of the 
tooth. In the centre of the table is a cavity (a), familiarly known 
as the " mark," on account of the dark colour of its interior. 
In form, the table of the recent tooth may be described as an 
elliptical figure, with its long axis running transversely. At the 
end of the lang the figure is also elliptical, but the long axis is 
exactly at riglit angles to that of the table; and by grinding, or 
by the slower process of wearing an incisor tooth irom the upper 
surface towards the fang, a series of figures will be formed, 
