162 



TEETH. 



the aged quadruped, moreover, the narrowing of the incisors allows the 

 spaces between the organs to be vacant. Within these spaces the food 





IWELYE lEARS OLD. 



TWENTY TEARS OLD. 



THTRTT TEARS OLD. 



THB nrcisoRS op houses or diffkrent periods of age after the fifth tear. 



accumulates, which, being there retained and becoming black, looks as 

 though the creature had been chewing tobacco. Such signs are too fixed 



