A CONTRIBUTION TO THE STUDY OF THE SCOTTISH SKULL. 



361 



cephalic group, and 2 per cent, less in the hypsicephalic group than in the correspond- 

 ing groups in the male. The grouping of the male and female does not sensibly alter 

 the percentage in the hypsicephalic group compared with the male group. 

 As regards the breadth-height index we have the grouping as follows : — 



Table XIII. 



Class. 



West Scottish Series. 



Turner's Series. 



F. 



M. 



M. & F. 



M. &F. 



Hypsistenocephalic .... 

 Platychamsecephalic 



per cent. 



4 



96 



per cent. 

 16-5 

 83-5 



per cent. 

 14 

 85-9 



per cent. 



4 



96 



In Turner's series of 150 the percentages in the two groups were exactly the 

 same as those found in the present female series of 100. By associating the male 

 and female percentages together we find that the numbers in the two groups for male 

 and female together are sensibly altered, owing to there being a relatively high pro- 

 portion of hypsistenocephalic skulls in the male group. 



Passing now to the indices that are derived from the dimensions of the facial 



skeleton and beginning with the gnathic index, we find in the female series the 



following grouping, and a comparison with the other series gives the following 



table : — 



Table XIV. 



Class. 



West Scottish Series. 



Turner's Series. 



F. (100). 



M. (399). 



M.&F.(499). 



M. & F. 



Orthognathic ..... 

 Mesognathic ..... 

 Prognathic ..... 



per cent. 



82 



15 



3 



per cent. 

 77-2 

 21 

 1-7 



per cent. 



78-1 



19-8 



2-2 



per cent. 



74-2 



24-7 



1 



The proportions in the different classes, taking male and female together, are not 



very different in the two series of Scottish skulls. Grouping the female skulls into 



the three classes according to the magnitude of the nasal index, we get the following 



results : — 



Table XV. 



Class. 



West Scottish Series. 



Turner's Series. 



F. (100). 



M. (399). 



M.&F.(499). 



per cent. 



66-3 



27-4 



6-2 



M. &F. 



Leptorhine ..... 

 Mesorhine ..... 

 Platyrhine ..... 



per cent. 



60 



34 



6 



per cent. 



67-9 



25-8 



6-2 



per cent. 



75-6 



21-1 



3-2 



