a -3= 



(Fig. 1 continued) 



Stage 5. First molarf ully up and second molar half up in both jaws ; permanent premolars visible 

 between the roots of their predecessors; permanent lower incisors and lower canine fully developed. 

 No. 49484, 9 juv., Niapu, December 4, 1913. 



Stage 6. Slightly more mature, the molars being full-grown, but premolars of permanent set still 

 covered by the milk teeth in both jaws; caniniform pi nearly mature; upper milk canine has been 

 shed. No. 49468, cf, Niapu, November 25, 1913. 



Stage 7. Mature permanent dentition, but upper canine not fully grown. No. 49486, 9 , Niapu, 

 December 6, 1913. 



Stage 8. Senile stage to show wear of teeth. In old age the first premolar becomes greatly worn in 

 both jaws, sometimes only the roots of p 1 remaining. No. 49503, old 9 , Niapu, December 8, 1913. 



35 



