“The 25,000 Mambila people produced a considerable number of masks and figures that are characterized by a heart-shaped face; red and white pigments were often applied later.”
“Dances celebrating the end of the planting seasons are led by a tribesman wearing a cephalomorphic helmet mask. In turn, he is followed by the retinue of assistants wearing secondary masks in the shape of a dog’s head and a crow’s head.”

Source:
Baquart, Jean-Baptiste. The Tribal Arts of Africa. New York: Thames and Hudson Inc. 1998. Print.