402 



JOURNAL, R.A.S. (CEYLON). 



[Vol. IX. 



Davis. Virchow. 

 mm. mm. 



Frontal vertical extent 124-5 ... 123-0 



Parietal ... 127-0 ... 121*0 



Occipital ... 114*3 ... 111-0 



Whole sagittal arch ... 365-8 ... 355-0 



Average ... 360-4 mm. 

 or reckoned by the percentage of the entire sagittal arch : — 



mm. mm. 

 Frontal vertical extent 34-0 ... 34 v 6 



Parietal ... 34*7 ... 34-0 



Occipital ... 31-2 ... 31-2 



100-0 100-0 



Here the figures agree at least as far as regards the share 

 of the squama occipitale in the formation of the roof of the 

 skull : they show that to the squama belongs a considerable 

 share, almost a third, and this may well be looked upon as 

 a characteristic. 



The relation of the extent in length to the horizontal 

 extent varies only a little in the two measurements. It 

 amounts by mine to 73*0, by Mr. Davis's to 74*9, on the average 

 74*5 per cent, of the horizontal extent, which, compared with 

 relation to the vertical extent, is a very considerable figure. 



Much more homogeneous are the results of the measure- 

 ments in regard to the form of the head. 



The average index of ratio between length and breadth is 

 decidedly dolichocephalous. It amounts with : — 



mm. 



Mr. Davis, from 10 skulls, to ... ki . 71-3 



Mr. Flower, from 8 skulls, to ... ... 71*9 



Myself, from 2 skulls, to ... ... 71-9 



Total from 20 skulls ... ... 71-6 



We have here omitted to bring into the account the two 

 before-mentioned deformed skulls, which have a brachy- 

 cephalous index ; the one in the London Museum has an 

 index of 82*9, the other from the Colombo Museum of 80*6. 



