North of the Lukuga river the main chain throws out into the central zone, in a north-westerly direction, a secondary range known as the Bambara Mountains, which forms one of the boundaries of the Manyema country.
The tribes represented include Jamans, Wongaras and Mandingos (q.v.), some of whom are Moslems. The Mandingos have intermarried largely with the Bambara or Sienuf, an agricultural people of more than average intelligence widely spread over the country, of which they are considered to be the indigenous race.