12 DAVID HEPBURN. [No. 2. 



this segment to the total basi-bregmatic height was 3 per cent. 

 greater in the Scandinavian race. Similarly as regards the 

 infra-zygomatic segment, the average height was 4.9 mm. less 

 among the Scandinavian skulls as compared with the Australian 

 Aboriginals, yet among the former the infra-zygomatic segment 

 was 3 per cent. less than among the latter. 



Glearly therefore these differences indicate a distinct change 

 in the vertical porportions of these two types of dolicho-cephalic 

 skulls, whereby in the Scandinavian type the supra-zygomatic 

 segment was increased by three per cent., and the infra-zygomatic 

 segment was reduced by three per cent., and that notwithstanding 

 an average reduction of 5 mm. in their total height as compared 

 with the Australian Aboriginals. 



(b) Brachy-cephalic (5). In this group the total height varied 

 from 126 to 132 mm., giving an average of 128.4 mm. Here 

 again the contrast with brachy-cephalic skulls of Sandwich Is- 

 landers was no less striking, for the average reduction in the 

 total height of the Scandinavian skulls was 11.6 mm. 



The supra-zygomatic segment varied from 101 to 111 mm., 

 giving an average of 105.2 mm. which represents 81.9 per cent 

 of the average total height. The average height of this segment 

 was 8.7 mm. less than the average height of the same segment 

 among Sandwich Island skulls and yet the average percentage 

 was 81.3 among the latter and 81.8 among the former. Again 

 therefore there is evidence that the relative proportions of the 

 supra-zygomatic segment have increased in those Scandinavian 

 skulls. 



(c) Mesati-cephalic (5). Here the height varied from 119 to 

 132 mm., giving an average of 127 mm. It is interesting to 

 observe that this average is not intermediate between the averages 

 of the dolicho-cephalic and brachy-cephalic groups, but is smaller 

 than both. 



The supra-zygomatic segment varied from 90 to 105 mm. 

 the average being 100.6 mm. This represents 79 per cent. of 

 the total height, and leaves 21 per cent for the infra-zygomatic 

 segment. The interest of these figures lies in the fact that 



