106 

 Stephanic Index. 



Male 



Female 



Total , 



This index again is fairly constant, averaging 90 in 12 

 skulls; the average being 91'5 in the males, and 886 in the 

 females. The greatest variation is 14"9. 



Index of Foramen Magnum. 



No. Average. Minimum. Maximum. 

 Male 



Female 



Total 



This index averages 859 in nine skulls ; 87 in the male, and 

 85'1 in the female. The variation is considerable (235). 

 Topinard's figures are approximate to this being 85*5 in the 

 male, and 81*2 in the female. These figures combined give 

 an average of 86*7 in the male, and 83*1 in the female, or 84*7 

 in both sexes. 



Facial Index. 



No. Average. Minimum. Maximum. 



Male 3 726 684 76.7 



Female 1 697 



Total 4 71-9 68-4 76'7 



This index averages 71'9. In the three males which we 

 have measured it is 72*6, and in the one female, 69*7. Broca, 

 in eight Tasmanian3, finds an average of 62*6. Calculating 

 from Topinard's figures in Ling Roth's " Tasmanians," we 

 obtain an index of 692 in the male, and 65*0 in the female. 

 In one skull in the Cambridge collection which was measured, 

 the facial index was 70*2. These figures combined give an 

 average facial index of 67*9. 



Median Circumference. — In measuring the arcs of this cir- 

 cumference, we find in eleven skulls that were available that 

 the average length of the parietal arc, 1261, is longer than 

 that of the frontal, 1257, or the occipital arc, 11] *5. This 

 is borne out by J. Barnard Davis's measurements of 10 skulls, 

 where he finds the same condition ; his figures also are fairly 

 approximate to ours, viz., frontal arc, 125mm.; parietal,, 

 130mm.; and occipital, 110mm. 



