15 examples of S–s–U– have been recordedin Africans of Rhodesia and the adjacent countries of Malawiand Mozambique. None were found in 1,000 Bantu-speakingNegroes of Natal. The frequencies of S–s–U– phenotypesin the various tribes examined are presented, and two possibleU variants show that the S–s–U+ phenotype may bepresent.