of the Animals of the Farm. 413 
of the thoroughbreds " Kremlin" and " Epirus," will show how 
far the appearances may differ in animals of the same age. 
Both horses were foaled in 1834, and the drawings show the 
state of the teeth in 1853, when the animals were nineteen 
years old. 
Fig. 20. — Incisors of Horse, (" Kremlin,"^ at nineteen. 
In both cases the teeth form a more acute angle with the 
jaw than is usual at this age. In this particular both mouths 
agree, but in other respects they differ from each other to a 
remarkable extent. 
The central enamel can yet be seen in all the incisors of 
" Epirus " (Fig. 21, p. 414). In fact, the remains of the marks are 
more evident than they are in the teeth of " Lothario"' (Fig. 19) 
at twelve years of age. The table of the incisors in the mouth 
of the older animal are triangular instead of square. 
"Kremlin" (Fig. 20) shows a comparatively youthful form 
of the tables of the incisors, a condition which is due to the 
rectangular position of the teeth in regard to the jaw, but it 
is evident that the central enamel is entirely worn out, not a 
trace remaining. The small circles in the tables of the teeth 
merely indicate the apex of the inverted cone in which the 
