DEVELOPMENT OF EXTERNAL NOSE IN WHITES AND NEGROES. 



181 



in both races during the eighth month (see curves in figure 3). Martin (1914) 

 gives figures for the relative nasal breadth of adult negroes, which equal those of 

 negro fetuses of the eleventh week. In the author's adult negro material it does 

 not reach these high figures. In whites the nasal breadth diminishes during growth 

 from about one- third to one-fourth of the interzygomatic breadth. The con- 

 siderable ranges of variation of the relative nasal breadth lead to the conclusion 



TABLE 7. Relative increases in size. 



-week 



monl'h-' year- 



10. tl 12 (3 11 15. )(j. 17 18 19 20. 22 2t 7. 8 9 10 2. adulf 

 FIGURE 3. Curves of average relative nasal breadths. 



that there is but little correlation between the breadth of the nose and the breadth 

 of the face. Generally speaking, the relative growth of the latter during intra- 

 uterine development exceeds the relative growth of the former. In postnatal life 

 this relation is reversed. For racial diagnosis the relative nasal breadth could be 

 used to greater advantage than the relative nasal height. Very high values for 

 this index constitute an almost certain indication of negro blood in a given case; 



TABLE 8. Averages and ranges of variation of the nasal index and averages of the upper facial index. 



