TOOTH DEVELOPMENT DASYPUS NOVEMCINCTUS 



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tigator who has described the deposition of enamel in connection 

 with them, and he also appears to be the only one who believes 

 that they will be erupted. Previously in this paper, I have 

 described briefly these front teeth and have shown that all earlier 

 investigators mistook the last of these functionless teeth for one 



Fig. 7 Diagram of a lingual aspect of milk tooth a few months after birth 

 showing the position of the permanent successor which lies in a groove at the 

 base of the milk tooth. MT, milk tooth; PT, pennanent tooth. X 15 (reduced 

 h). 



Fig. 8 Diagram showing the seven permanent teeth a few months after birth. 

 These teeth were lying in grooves on the lingual side of their milk predecessors 

 and would not have been erupted for some time. 1-7, permanent teeth 1-7. 

 X 15 (reduced |). 



of the permanent back teeth. I shall now proceed to a more 

 detailed account of the development of each of the functionless 

 front teeth that I have found in my embryos. 



Stages in the development of the sixth and last front tooth 

 may be seen by consulting figures 11, 12, 13 and 14, and text 

 figures 2, 3, 4, and 10 a. The sixth front tooth is always one- 



