Of all the Somali the Rahanwin betray the largest infusion of negroid blood.
The Semang, as they are most usually called by the Malays, are Negritos - a small, very dark people, with features of the negroid type, very prognathous, and with short, woolly hair clinging to the scalp in tiny crisp curls.
The country is occupied by a partly settled, partly nomad population of an extremely mixed negroid character.
The great plain of Sennar is mainly occupied by Hassania Arabs in the north, by Abu-Rof (Rufaya) Hamites of Beja stock in the east as far as Fazogli, and elsewhere by the negroid Funj and the group of tribes collectively known as Shangalla (the Bertat, Legas, Sienetjo, Guinus, Kadalos, &c.; see Shangalla).
The last group, the Negroid, is represented by the races to which has been given the name of Negrito, from the small size of some of them.