210 SOCIAL EVOLUTION 



and red, it gives an admirable distribution geographic- 

 ally, and besides this, gives a correlation between head 

 form and hair form. If now, we substitute Professor 

 Giddings' nomenclature for the popular terms black, 

 white, and yellow, the system of racial classification as- 

 sumes the following form: 



/. The Australian-African Group. 



Characteristics: black skin, dolichocephalic, 

 prognathic, woolly or frizzly-haired (cross- 

 section of hair very elliptical). 7 



Area of distribution: Australia and Africa 



south of the equator. 

 77. The Polynesian-European Group. 



Characteristics : fair skin, mesocephalic orthog- 

 nathic, straight or wavy hair (cross-section 

 slightly elliptical). 



Area of distribution : broad zone from Polynesia 

 north westward through southwestern Asia 

 and northern Africa and most of the con- 

 tinent of Europe. 

 777. The Asian- American Group. 



Characteristics : yellow or red skin, brachy- 

 cephalic, narrow-eyed, lank or straight- 

 haired (cylindrical in cross-section). 



Area of distribution: eastern Asia and western 

 America, chiefly north of the equator along 

 the semicircular shore-line of Asia and 

 America. 



This hypothesis agrees with the conditions which were 

 first laid down. The Polynesian-European group oc- 

 cupies at the present time that zone of territory which 



7 See figure 64. 



