14 DAVID HEPBURN. [No. 2. 



than in the latter, and yet the percentage proportion of the 

 supra-zygomatic segment of the civilised skull is so much hetter. 

 It is somewhat unexpected to find the Northern Grania losing 

 in average vertical height and yet steadily gaining in the pro- 

 portion of that segment of this diameter which so closely corre- 

 sponds to the height of the cerebrum. The same statement 

 may be repeated regarding the supra-zygomatic segment of the 

 Scandinavian brachy-cephals; for although the proportions are 

 not materially different from those of the South Sea Island 

 skulls, yet they are relatively much better when we consider 

 the marked reduction in the total average height of the Scandi- 

 navian group. 



It seems to me that we have here undoubted evidence of 

 the importance and value of analysing the proportions upon 

 which crania are built; for such a result as that above described 

 could not be discovered by merely stating the total length of a 

 given diameter. 



Furthermore these proportions lend support to the assump- 

 tion that they bear a definite relation to the cerebral and cere- 

 bellar development. 



Glabello-occipital Length. 



The average length of this diameter in the Scandinavian 

 dolicho-cephalic skulls was 186.7 mm. as compared with 187.4 mm. 

 for twelve Australian Aboriginals. For the Scandinavian brachy- 

 cephalic skulls, the average length was 182.4 mm. as compared 

 with 175.2 mm. for eleven brachy-cephalic Sandwich Islanders. 

 For the Scandinavian mesati-cephalic skulls, the average length 

 was 177.8 mm. 



Thus we may say that among the Scandinavian skulls 

 length was a less pronounced feature in the dolicho-cephalic 

 group and a more pronounced character in the brachy-cephalic 

 group. At the same time, so far as length is concerned, the 

 Scandinavian mesati-cephals did not stand intermediate between 



