PLATE III. 



DISSECTED SKULLS SHOWING THE DEVELOPMENT OF THE TEETH 

 Continued (Noyes). 



9. Skull in eleventh year. The incisors are in position, but the tem- 

 porary molars and cuspids are still in position. The second permanent 

 molar is through the bone but not through the gum. 



10. The left side of the same skull. On this side the lower tem- 

 porary cuspid and first molar have been lost. Note the position of the 

 upper cuspid in these pictures and the distance the root extends toward 

 the orbit. The lateral on the left side is not of typical form, but is a 



'peg tooth." 



11. Skull in the thirteenth year. The lower second molar the only 

 remaining temporary tooth. The second permanent molar is in place 

 but the roots are not fully developed. The crypt for the third molar 

 (wisdom tooth) is seen. 



12. Skull of young adult. The upper centrals are broken. The 

 second molars are fully developed and the third molar shows the crown 

 fully formed in the crypt. 



13. Skull of adult. This shows the full permanent dentition and 

 the roots of the teeth. 



14. Edentulous jaws. Notice the position of the mental foramen. 



