262 MAMMALIAN DENTITION 



relatively much later than in Man in whom, however, it lies 

 just as deeply imbedded as in the Anthropoids. No sexual 

 distinction in time of eruption of the canine has been noted in 

 the human dentition yet the deeply seated position of the 

 rudiment of this tooth is a sure indication that it was formerly 

 powerful and long-rooted as in the Anthropoids today. 



In both Anthropoids and Man the root tips of the second 

 and third mandibular molars lie near the inferior dental canal 



Fig. 95. — Skiagram of jaws of Chimpanzee (Pan sp., 9.88-16). In this adolescent 

 female the canine has erupted before the third molar. Note the very close relation 

 between the developing roots of the third molar and the inferior dental canal which 

 opens out (unlike the condition in Man, Fig. 96) into a large space at the level of the 

 second molar. In the adult Anthropoid the root tips of the third molar even over- 

 shoot the inferior dental canal. 



but in the former they often overshoot the canal itself, a con- 

 dition not found in Man in whom from the tendency, very 

 obvious in modern Europeans, toward shortness of root the root 

 tips are further removed from the canal than they are in An- 

 thropoids (Figs. 95, 96). The precise distance naturally varies 

 with the individual. In the Heidelberg mandible there is a very 



