W. R. Macdonell 
225 
In the following characters I will compare the variability of our series with 
that of the Naqadas only, there being practically no material available for other 
races, and for this purpose I use coefficients of variation. 
English 
Naqadas 
(? 
¥ 
? 
B' 
4-29 
4-55 
5-29 
4-47 
H 
4-21 
3-96 
3-98 
3-66 
LB 
4-07 
4-11 
4-88 
4-68 
S 
3-63 
3-90 
3-19 
3-51 
G'H 
5-50 
7-14 
6-08 
6-87 
GB 
5'58 
5-40 
5-18 
4-77 
J 
4-28 
4-13 
4-16 
4-77 
Nil "... 
5-08 
5-55 
613 
6-81 
NB 
8-89 
7-06 
7-89 
7-28 
O^L 
4-20 
3-53 
4-97 
5-30 
0,R 
4-69 
4-00 
5-02 
5-38 
0.,L 
5-61 
4-31 
7-06 
6-58 
OlR 
6-65 
4-47 
7'27 
6-85 
G, 
7 '75 
7-68 
9-29 
8-55 
GL 
4-68 
4-95 
4-84 
5-09 
ioo&y6'i... 
8-39 
8-52 
10-23 
8-20 
In the midst of great diversity, some features emerge that are common to both 
races ; e.g. the great variability of upper face height in females, of the breadth of 
the nose and palate in males arid females, also of palatal index in both sexes. It is 
also noticeable that the variability of orbital height is much greater than that of 
orbital length in the males of both races. 
I will conclude this part of the subject by dealing with the variability of the 
mandibles, for which I give a separate table as before : 
TABLE VIII. 
Variability of English Mandibles. Male and Female. 
Character 
Mean 
Standard 
Deviation 
Coefficient of 
Variation 
113-21 + -41 
6-31 + -29 
5-57 + -26 
9.5-40 + -46 
8-31 + -32 
8-71 + -34 
30-76 + -21 
3-61 + -15 
11 -73 + -49 
f 
43-67 + -14 
2-72 + -10 
6-23 + -23 
