DISEASES OF THE HOG. 25 
The mouth of the hog is large and the labial fis- 
sures extend far back; the upper lip is blended 
with the snout; the canine teeth are well devel- 
oped, especially in the male; the lower tusks are 
long and curved outwards and upwards; the upper 
ones pass downwards and outwards, and they con- 
tinue to grow during the life of the animal. 
