TEETH 



The human teeth (Fig. 52) are reduced in 

 number. There are only two incisors above 

 and below on each side ; then the small canine 







Fig. 51. — Photograph of a preparation ot tlie teetli of the upper 

 and lower jaw of a Pig. Tlie small teeth between the 

 upper and lower row of large teeth are the milk teeth or 

 " first " teeth which are shed. Note how small the 

 predecessors (15 and 23) of the great tusks are. and also 

 that the foremost molar (7 and 33) in both upper and 

 lower jaw has no successor or predecessor, as is also true 

 of the three back molars. 



or dog-teeth, one on each side ; then five cheek 

 teeth or " molars," two smaller and three 

 bigger. From a single tooth we could tell 

 whether a piece of jaw-bone belonged to a man 



79 



