THE ULOTRIOHI AND THE LEIOTRICHI. 421 



The mental prominence may project beyond the line of 

 the vertical alveolar margin of the mandible, in the higher 

 races, or it may be almost obsolete, and the alveolar margin 

 may be greatly inclined forward, in the lower. 



The different races of mankind are divisible into two 

 primary divisions ; the Ulotrichi^ with crisp or woolly hair, 

 and the Leiotrichi^ with smooth hair. 



a. The color of the JJlotrichi varies from ^^ellow-brown to 

 the darkest hue known among men. The hair and eyes are 

 normally dark, and, with only a few exceptions (among the 

 Andainan Islanders), they are doUcJiocephali. The Negroes 

 and Bushmen of ultra-Saharal Africa, and the Negritos of the 

 Malay peninsula and archipelago, and of the Papuan Islands, 

 are the members of this Negroid stock. 



h. The Leiotrlchi are divisible into — 



1. Tlie Austrcdioid group, with dark skin, hair, and eyes, 

 wavy black hair, and eminently long, prognathous skulls, 

 with well-developed brow-ridges, who are found in Australia 

 and in the Dekhan. The ancient Egyptians appear to me to 

 have been a modification of this race. 



2. The Mongoloid group, with, for the most part, yellow- 

 ish-brown, or reddish-brown, skins and dark eyes, the hair 

 being long, black, and straight. Their skulls range between 

 the extremes of dolichocephaly and those of brachycephaly. 

 These are the Mongol, Tibetan, Chinese, Polynesian, Esqui- 

 maux, and American races. 



3. The JCanthochroiG group, with pale skins, blue eyes, 

 and abundant fair hair. Their skulls, like those of the Mongo- 

 loid group, range between the extremes of dolichocephaly and 

 brachycephaly. The Slavonians, Teutons, Scandinavians, and 

 the fair Celtic-speaking people are the chief representatives 

 of this division ; but they extend into North Africa and West- 

 ern Asia. 



4. The dark whites, or Melanochroi; pale-complexioned 

 people, with dark hair and eyes, and generally long, but 

 sometimes broad skulls. These are the Iberians and " black 

 Celts " of Western Europe, and the dark-complexioned 

 white people of the shores of the Mediterranean, Western 

 Asia, and Persia. I am disposed to think that the Melano- 



