A CONTEIBUTION TO THE STUDY OF THE SCOTTISH SKULL. 



353 



iii the various classes are very similar to those found in the subsidiary series " K," 

 while about 5 per cent, of those in Turner's chamsecephalic group and 4 per cent, 

 of those in his hypsicephalic group are transferred in this series to the metriocephalic 

 group. A feature of Scottish skulls, as pointed out by Turner (l), is the fact that 

 the breadth is greater than the height, except in rare instances. In his series of 150 

 skulls the height was greater than the breadth in two instances only (l"3 per cent.), 

 the height was equal to the breadth in four instances (2"6 per cent.), while the 

 height was less than the breadth in the other specimens, i.e. the Scottish skull is 

 platychamaecephalic. 



In the complete male series now under examination, associated doubtless to a 

 large extent with the smaller value of the maximum breadth, the height was equal 

 to, or greater than, the breadth in 67 specimens, i.e. 16 per cent, compared with 

 4 per cent, in the former series. In the " K" subsidiary male series the height was 

 greater than the breadth in 12 per cent, and equal to the breadth in 8 per cent. — 

 in all, 20 per cent. 



With regard to the circumferences in the two series, we see that while the mean 

 values of the total longitudinal circumferences are practically equal, as regards the 

 horizontal and vertical transverse circumferences, Turner's series shows a slight 

 excess in value over the present series. 



The longitudinal circumference comprises the complete sagittal arc, with its 

 frontal, parietal, and occipital segments, and the opisthio-nasal length or Cleland's 

 base line. 



With regard to the segments of the sagittal arc, I quote the following figures 

 from Turner : and these may be compared with the corresponding measurements 

 in the " K" subsidiary series in the following table : — 



Table IV. 





Turner. 



" K " Series. 



Longest frontal arc .... 



Shortest ,, ,, 



Longest parietal arc .... 



Shortest ,,,,.... 



Longest occipital arc . 



Shortest ,, ,,.... 



148 

 111 

 148 

 102 

 139 

 94 



152 

 120 

 143 

 112 

 141 

 107 



Turner says that the occipital arc was greater than the frontal arc in 13 cases 

 out of 144, and less than it in 131 cases. 



In the " K" series of 100 the occipital arc was greater than the frontal in 3 cases 

 and equal to it in 2 cases. In Turner's series of 138 the occipital arc was greater 

 than the parietal in 26 cases, i.e. less in 112 cases. In the " K " series the occipital 

 arc was greater than the parietal in 23 cases and equal to it in 2. In Turner's 



