Next in numerical importance to the Mongolians are the races which have been called by Professor Huxley Melanochroic and Xanthochroic. The former includes the dark-haired people of southern Europe, and extends over North Africa, Asia Minor, Syria to south-western Asia, and through Arabia and Persia to India.
He distinguishes four principal types of mankind, the Australioid, Negroid, Mongoloid and Xanthochroic (" fair whites "), adding a fifth variety, the Melanochroic (" dark whites ").
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