Plate 45. Slope of the Teeth at Different Ages. 



Yic 22. — Two years. Fig. 23.— .St\r years. 



Fig. 24. — Twelve years. 



Fig. 25. — Eighteen years. 



Fig. 26. — Extreme Aqe. Fig. 27. — Closing of Mouth in Extreme Age. 



Fig. 2S.— The Tusks. 

 Four years. Five years. Six years. Eight years. Tioelce years. 



Old. 



