PLATE 45. SLOPE OF THE TEETH AT DIFFERENT AGES. 



Fig. 22. Two years. Fig. 23. Six years. 



Fig. 24. Twelve years. 



Fig. 25. Eighteen years. 



Fig. 26. Extreme Age. 



Fig. 27. Closing of Mouth in Extreme Ag 



Fig. 28. The Tusks. 

 JTour years. Five years. Six years. Eight years. Twelve years. 



Old. 



