416 A Study of the Nasal Bridge in the Anthropoid Apes 
Whether we take the number of cases in which the female is more variable 
than the male — i.e. 7 out of 9 in the first series and 6 out of 10 in the second — 
or the mean variabilities of the whole series, we see that the female is certainly 
not less variable than the male. 
Massed as above the table seems to show more racial relationship to variability. 
The races group better together, and generally speaking — Veddahs, perhaps, ex- 
cepted — there is decreasing variability as we reach higher degrees of civilisation, 
i.e. as we pass from the Apes through East Asiatics and Negroes to Hindoo, 
Ancient Egyptian and English. It is as well to see if these results correspond 
with those for the two mesodacryal and the simotic indices. 
It will be seen in the first place that these results (Table XIX) confirm those 
of the previous table (XVIII) for the variation of the absolute lengths, in that 
TABLE XIX. 
Average Values of Variability of Indices of Nasal Bridge (a, /3 and S) 
From Standard Deviations 
From Coefficients 
of Variation 
6 
? 
<* 
? 
Chimpanzees ... 
Gorillas 
Orangs 
6-8 
14-5 
30-8 
7-8 
14-4 
24-0 
Chimpanzees . . . 
Gorillas 
Orangs 
29- 2 
31-5 
30- 0 
35-3 
29-8 
21-1 
[Hylobates $ + ? 9 -9] 
[Hylobates $ + ? 30'4] 
Mean 16' 4* 
Mean 29S* 
Malays 
Javanese 
8 '2 
11-2 
Malays 
Javanese 
20-8 
27-5 
Mean 
9-7 
Mean 2^2 
Congo ... 
Gaboon (1864) 
Gaboon (1880) 
7 3 
7-4 
93 
7-2 
9-1 
9-4 
Congo ... 
Gaboon (1864) 
Gaboon (1880) 
22-9 
20-4 
25-0 
24-3 
24-8 
28-3 
Mean 
8S 
Mean 2^3 
Philippines ... 
Borneo... 
7-0 
10-0 
8-4 
Philippines ... 
Borneo 
19-2 
28-5 
2F9 
Mean 
8-5 
Mean 
23-2 
Veddahs 
Hindoos 
10-3 
9-7 
14-9 
Veddahs 
Hindoos 
18-4 
18-5 
27-7 
Mean 
11-6 
Mean 2V5 
Egyptians 
English 
1 9-3 
| 10-6 
8-9 
8-3 
Egyptians 
English 
16-5 
18-9 
1 18-6 
| 16-3 
Mean 
9-3 
Mean 
17-6 
General Means 
10-9 
1 11-2 
General Means 
23-4 
24-8 
* Hylobates not included. 
