180 
Mr Myers, The Ethnology of Modern Egypt. 
If we deduct 10 mm. from the head length and 105 mm. from 
the head breadth, and a proportionate figure, 1*6, from the 
cephalic index (these deductions being based on Welcker’s in- 
vestigations*, and allowance being made for the closely-cropped 
hair of my subjects), the figures then become : — 
Series 
No. 
Head length 
Head breadth 
Cephalic Index 
Nakada (“prehistoric”) 
139 
185-13 
134-87 
72-99 
Kena and Girga | 
(“modern”) J 
136 
184-63 
133-66 
72-53 
whence I conclude that there is no essential difference between 
the head-measurements of the prehistoric and of the modern popula- 
tion of this region of Egypt. 
A similar conclusion results from the study of the comparative 
variability of the prehistoric and modern peoples. In the following 
table, a expresses the standard deviation, C the coefficient of 
variability, and each value is followed by its probable error. 
Series 
Head length 
Head breadth 
No. 
O' 
C 
No. 
O' 
C 
Nakada (“ pre- ) 
historic ”) j 
139 
5-75 ±0-23 
3-17 ±0-13 
139 
4-60±0-19 
3-29 ±0-13 
Kena and Girga ) 
(“modern”) J 
136 
5-83 ±0-24 
3-00±0-12 
136 
4-31±0-18 
2-99±0-12 
Series 
Cephalic Index 
Auricular Height 
No. 
( T 
C 
No. 
O' 
C 
Nakada (“pre- [ 
historic ”) J 
Kena and Girga ) 
(“ modern ”) J 
130 
136 
2-80 0-12 
3-04±0-12 
3- 83±0-16 
4- 10±0-17 
140 
64 
4-46 ±0-18 
4-47 ±0-27 
3-86±0-16 
3-07 ±0-18 
Series 
Horizontal Circumference 
Upper Facial Index 
No. 
O' 
C 
No. 
O' 
C 
Nakada (“pre- [ 
historic ”) J 
Kena and Girga | 
(“ modern ”) J 
118 
57 
13-00 ±0-57 
13-38 ±0-84 
2-54±0-ll 
2-45 ±0-15 
76 
135 
4-52±0-25 
3-14 ±0-13 
6-41 ±0-35 
6-53 ±0-27 
* Schiller’s Schcidel und Todtenmaske, Braunschweig, 1883, quoted by Lee and 
Pearson, Phil. Trans. Boy. Soc., 1901, cxcvi. p. 251. 
