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THE HOME, FARM AND BUSINESS CYCLOPAEDIA. 



PIG. 



TEMPORARY INCISORS AND TUSHES. 



Period. 



Number. 



Position. 



At birth 2 Tushes. 



2 Corner Incisors. 



1 month old 2 Central. 



-3 months old 2 Lateral. 



PERMANENT INCISORS AND TUSHES. 



9 months old. 2 Tushes. 



" " Corner Incisors. 



12 months old Central. 



18 months old 2 Lateral. 



TEMPORARY MOLARS. 



1 month old 3 First, Second, Third. 



PERMANENT MOLARS. 



6 months old 1 Premolar. 



" " 1 Fourth. 



9 months old 1 Fifth. 



12 months old 3 I First, Second, Third. 



18 months old 1 Sixth. 



The pig acquires a full mouth of incisor teeth at about three months 

 old, some time previous to which three molars have appeared in each jaw 

 viz., the first, second, and third. At six months the premolars and the 

 fourth permanent molar appear ; in nine months the tusks and fifth per- 

 manent molar are changed. Three months later the first, second, and 

 third temporary molars are shed and replaced by permanent ones. At 

 eighteen months the sixth or last molar and the lateral incisor are cast, 

 -and the changes at this time are complete. 



