| | | | | +Eriocomi+ | | | | | | \-----------v-------------/ 6. =Malays= | | 7. =Mongols= | | | | | | | | | | | \-------v-------------------------------------/ | =Promalays= 2. =Hottentots= | | 1. =Papuans= | | | 5. =Australians= | | | | | | | | | | \----v---/ | \-----v-----/ +Lophocomi+ | +Euthycomi+ | | | \---------v---------/ | =Woolly-haired= =Straight-haired= +Ulotrichi+ +Lissotrichi+ | | | | | \--------------v-----------------/ +Primæval Men+ In the eight higher races of men, which we comprise as _straight-haired_ (Lissotrichi), the hair of the head is never actually woolly, although it is very much frizzled in some individuals. Every separate hair is cylindrical (not like a tape), and hence its section is circular (not oval). The eight races of Lissotrichi may likewise be divided into two groups—stiff-haired and curly-haired. _Stiff-haired men_ (Euthycomi), the hair of whose heads is quite smooth and straight, and not frizzled, include Australians, Malays, Mongolians, Arctic tribes, and Americans. Curly-haired men, on the other hand, the hair of whose heads is more or less curly, and in whom the beard is more developed than in all other species, include the Dravidas, Nubians, and Mediterranean races. (Compare Plate XV.)