350 



DR MATTHEW YOUNG. 



Comparing the measurements of the present series with Turner's series and 

 beginning with the rapacity of the male skulls, we find that, in the large male group* 

 the mean capacity is I 4595 c.c, while for Turner's male series the mean capacity is 

 L478 c.c, a difference of about 20 c.c In estimating the capacity I have followed 

 carefully the directions of Turner both as to material, i.e. shot, and technique, as 

 furnished in his " Challenger'' Reports and in his memoir on the Scottish skull, but, 

 as is well known, the ''personal equation" is an important factor in estimating 

 • apacity of skulls even by similar methods. 



Comparing the lengths in the two series of Scottish skulls, i.e. the glabello- 

 occipital lengths or greatest lengths, we find that there is a difference of about 

 I mm. in the mean values, with the advantage on the side of the present series, the 

 values being 186'6 mm. and 187 '52 mm. respectively. For the "K" series the mean 

 glabello-occipitai length is 189'2 mm. 



Table I. 

 Mean Values of Dimensions of Male Skulls. 



Character. 



Present Series. 



Turner's Series. 



Renfrew Group. 



"K" Series. 



Cubic capacity 



1459-5 + 411 



1478 



1526 



1511-3 + 8-60 



Glabello-occipitai length . 





187-52 + -20 



186-6 



190 



189-18 + -39 



Basi-bregmatic height 





l32-72±-17 



132-4 



133-5 



133-71 ±-37 



Vertical index . 





70-81 ± -09 



70-9 



70-3 



70-7 ±-20 



Maximum breadth . 





139-56 ±-16 



144-3 



142-8 



140-7 + -29 



Cephalic index 





74-36 + -08 



77-4 



75-1 



74-41+16 



Horizontal circumference . 





526-60 + -47 



531 



531 



529-69 



Vert, trans, circumference 





426-23 



434 



429-9 



428-03 



Basi-nasal length 





100-37+13 



101-4 



101-4 



100-96 + -27 



Basi-alveolar length . 





95-08 + -16 



• 96 



94-5 



94-87 ±-32 



Gnathic index 





94-68 



94-5 



93-3 





Total long, circumference 





513-13 



513-2 



523 



517-43 



Tnterzygomatic breadth 





127-16±-18 



132-2 



127-5 



128 14 



Nasi-alveolar length 





70-96 + -16 



71-6 



73-5 



72-35 



Maxillo-facial index 





55-81 



54-3 



58-1 





Nasal height . 





51-72+11 



53-5 



52-2 



53-32 



„ width 





23 47 + -06 



23-1 



23-3 



23-18 



,, index 





45-58 + -15 



38-9 



45-2 





Orbital width . 





38-67 ±-05 



39 



39-3 



39-24 



height . 





33-05 ±-07 



34 



35 



33-76 



„ index . 





85-51 ±-17 



87-2 



89-08 





Palato-alveolar length 





52-94 



55-6 



54-5 



50-84 



,, breadth 





59-59 



60-9 



60-7 



57-91 



„ index 





112-76 



113 



111-4 





The mean values of the basi-bregmatic heights are practically equal, viz. 132 '4 mm. 

 for Turner's series and 13272 mm. for that under examination. In the " K "series 

 the mean value is about 1 mm. greater, i.e. 13371 mm. 



With regard to the greatest breadth or parieto-squamous breadth we find a 

 ootable difference in the two series of Scottish skulls; the mean value given in 



