110 
Holland (190 resp. 153) it appears that the population of Amsterdam 
has longer and narrower heads than the rural population. 
This is the cause of the Index cephalicus of the population of 
the town being so much lower (79) than the Index cephalicus of 
the rural people (80.5). 
In Rotterdam I found the following averages: Length 190, breadth 
150.5. On comparing these measurements with those of the country, 
it appears that both breadth and length are smaller. 
The same peculiarity may be applied to the people living in the 
towns of Utrecht and Arnhem, as is evident from the following data: 
Utrecht Length Breadth 
Province 190.3 153.2 
town of Utrecht 190 150.6 
Gelderland 
Province gs J ahs 154.2 
Arnhem 190.— 151.5 
As regards the towns of Rotterdam, Utrecht and Arnhem, the 
head is shorter and narrower, in fact smaller, than that of the 
people living in the country, surrounding these towns. As the diffe- 
rences between the breadth-dimensions are larger than those between 
the length-dimensions, the Index cephalicus of the inhabitants of the 
town is smaller than the Index cephalicus of the rural people. 
