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SMITHSONIAN MISCELLANEOUS COLLECTIONS 



vol. 59 



and the more distinct one with the head. These conditions are seen 

 clearly in the following table. 



The increase of the measurement with the increase in the breadth 

 of the head is due on one hand to the correlation with the latter of 

 the breadth of the upper face, which in turn influences the lower 

 jaw ; and on the other to the effect of the broad base of such a skull 

 on the condyles and the ascending rami of the lower jaw. Broaden- 

 ing of the bigonial diameter independent of these factors is due 

 almost entirely to the action of the masseters, which in some instances 

 results in a marked eversion of the lower portion of the jaw at the 

 angle. 



KHARGA OASIS, MEN: RELATION OF DIAMETER BIGONIAL TO BREADTH 

 OF FACE AND BREADTH OF HEAD 



I 



7 narrowest jaws 







14 broadest jaws 





9.7 cm. and below 





10.9 cm. and above 



Diameter 

 bigonial 



Diameter 



Greatest 



Diameter 

 bigonial 



Diameter 



Greatest 



bizygomatic 

 maximum 



breadth 

 of head 



bizygomatic 

 maximum 



breadth 

 of head 



cm. 



cm. 



cm. 



cm. 



cm. 



cm. 



8.9 



12. 1 



13.0 



10.9 



13 5 



14.2 



9.1 



12.6 



I4.8 



10.9 



13- 1 



I4.4 



9.1 



II. 8 



14.0 



10.9 



13.0 



14.5 



9.2 



12.8 



14.7 



10.9 



13-4 



14.4 



9-3 



13.0 



14.0 



II. 



13.8 



14.2 



9-3 



13.4 



14.2 



II. 



13.9 



I4.4 



9.4 



13.2 



13.9 



II. I 



13-7 



14.2 



9-5 



13.0 



13.3 



II. I 



13.5 



14.4 



9-5 



12.9 



13-4 



II. I 



13.4 



13.7 



9-5 



13. 1 



13.9 



II. 2 



13.8 



13.4 



9.6 



12.8 



13.4 



II. 2 



12.6 



13.8 



9.6 



12.9 



13-8 



II. 4 



13.6 



13-9 



9.6 



12.0 



13.2 



II. 8 



13.2 



14.6 



9-7 



12.9 



13.6 



12. 1 



13.6 



14.6 



9-7 



13. 1 



13.6 









9-7 



13.6 



14.2 









9-7 



13.3 



13.6 









Averages : 



9.4 



(8 9-9-7) 



12.85 

 (11. 8-13-6) 



13.8 

 (13.0-14- 



11.2 

 (10. 9-12. I 



13.4 

 (12. 6-13. 9) 



14.2 

 (13.4-14-6) 



Per cent 



100 



73.1 



68-1 



100 



83.6 



78-9 



Averages and per cent that would exist if the rela- 

 tion of the measurements were the same as in the 

 group with narrowest jaws. 



(15-3) 

 (87.1) 



(16.4) 

 (81.1) 



