358 



DR MATTHEW YOUNG. 



(B) The Mean Values of Dimensions and Indices of Female Skulls. 



Table X demonstrates the mean values of the principal measurements of the 



female skulls in Turner's series in apposition to those of the 100 female skulls 



contained in the collection at present under examination, and a brief review and 



comparison of these values shows on the whole a nearer approach to equality 



between the two groups of female skulls than between the two male groups 



alreadv examined. 



Table X. 



Mean Values of Dimensions of Female Skulls. 



Character. 



Present Series. 



Turner's Series. 



Benfrewshire 

 Group. 



Cubic capacity 



1314-5±6-30 



1322 



1300-5 



Glabello-occipital length . 





177-97±-32 



178-7 



177 



Basi-bregmatic height 





125-01±-31 



126 



127 



Vertical index 





70-31±-20 



70-5 



71-3 



Maximum breadth . 





135-16±-29 



138 



135-7 



Cephalic index 





76-03±-19 



77-2 



76-3 



Horizontal circumference 





503-61±-71 



506 



501-6 



Vertical transverse circumference 





408-10 



409-6 



406 



Basi-nasal length 





93-82±-20 



95-3 



95-2 



Basi-alveolar length 





88-61±-31 



91 



91-3 



Gnathic index 





9445 



94-8 



95-8 



Total longitudinal circumference 





490-13 



488-8 



489-9 



Interzygoinatic breadth . 





118-16±-26 



121-5 



119-7 



Nasi-alveolar length 





65-83±-24 



67 



68-5 



Maxillo-facial index 





55-71 



55-1 



56-9 



Nasal height .... 





48-41±-20 



49-9 



50-6 



,, width .... 





22-56±-ll 



22-1 



21-3 



,, index .... 





46-77±-30 



44-4 



42-2 



Orbital width ..... 





37-24±-09 



37-4 



36-8 



height 





32-95±-13 



33-0 



33-3 



,, index .... 





88-53±-35 



84-6 



90-4 



Palato-alveolar length 





49-23 



51 



52-1 



,, breadth . 





56-08 



58-3 



59-5 



,, index 





114-16 



109-8 



114-6 



As regards cubic capacity, the difference of the mean values is only between 

 7 and 8 cubic centimetres, with the excess in favour of Turner's group ; and this 

 difference, as already explained, may easily be accounted for by the fact that the 

 cubage in the two series has been estimated in a similar fashion by different in- 

 dividuals. The glabello-occipital length and the basi-bregmatic height in the two 

 groups differ in their mean values by less than 1 mm., with the advantage in favour 

 of Turner's group. The vertical index, obtained from the above two measurements, 

 is practically equal in the two groups. 



A.S regards maximum breadth, the dimension which was notably different in the 

 two male groups, there is a difference in the two mean values, but it is less than 

 •"• inn)., and. as in the male series, Turner's value is the greater. Turner in his 



