DIGESTIVE SYSTEM 



67 



and four canine, or tushes. The formula for the temporary teeth 

 is as follows: 



2(UCiPMO=32 



Permanent nipper 



Permanent middle 

 incisor 



Permanent corner 

 incisor 



Permanent canine 



Fig. 14. Dentition of an 18-months-old pig (upper jaw) with permanent 

 incisors only. (Ostertag). 



The upper permanent incisors are distinctly separated from each 

 other and there is considerable space between the lateral incisor 

 and the canines. The lower incisors are nearly horizontal. The 



Permanent 

 middle 

 incisor 



Permanent nipper 



Permanent 



middle incisor 



Permanent 



corner incisor 



Permanent canine 



Fig. 15. Dentition of lower jaw of an 18-months-old pig, with permanent 

 incisors only. (Ostertag). 



