394 



DR MATTHEW YOUNG. 



lower margin of the orbit, to delineate on the tracing not only the line of the 

 Frankfurt horizontal plane, but also to get the auricular height at right angles to 

 that plane and the distance from the basion to the vault in a plane at right angles 

 to it. In the 100 male skulls I was able to compare the basi-bregmatic height 

 (Broca's) with this other height as used in Germany, and was able to convince 

 myself that the two were practically identical in the group examined. In the great 

 majority of the cases, in fact with the exception of a very few, the two measurements 

 were exactly equal ; in some cases there was a difference of a \ mm., and in only 

 practically a negligible number of cases did the difference in the two heights equal 

 1 mm. in amount. So far as the present series goes, therefore, I see no reason why 

 we should not regard the correlations of length and height and breadth and height 

 in the Naquada and Scottish crania as truly comparable, the difference produced in 

 the result due to the small difference in the heights being so small as to be of no 

 account. It is worthy of note that Huxley (29) pointed out many years ago that 

 the difference between the basi-bregmatic height and a more perpendicular height 

 was not more than nyth of an inch on the average. Having obtained the auricular 

 height by the method above noted, I was able to correlate this auricular height 

 with the length, breadth, and basi-bregmatic height in 100 male skulls and thus get 

 figures comparable with the Aino and German male results given by Pearson and 

 Lee (13). 



The following table (XXXIX) shows the comparison : — 



Table XXXIX. 



Race. 



Length and 

 Auricular Height. 



Auricular Height 

 and Breadth. 



Auricular Height and 

 Basi-bregmatic Height. 



M. 



M. 



M. 



Scottish (100) 

 German (100) 

 Aino (87) 



•45 ±-053 



- -096±-067 



•501 ±-054 



•39 ±-056 

 •072±-067 

 •345±-064 



•69±-034 



For the same 100 skulls the other correlation coefficients were 



Race. 

 Scottish 



Length and 

 Basi-bregmatic Heigbt. 



•35±'058 



Breadth and 

 Basi-bregmatic Height. 



•19±-064 



We see that, taking 100 male skulls, i.e. those with male characters well marked, 

 the correlation coefficient of length and basi-bregmatic height is practically unaltered, 

 while the correlation coefficient of breadth and basi-bregmatic height is slightly 

 diminished in value. Taking the auricular height instead of the basi-bregmatic height 

 to calculate the coefficient of correlation, we find that the auricular shows a distinctly 

 higher correlation, with both the glabello-occipital length and the maximum breadth 



