1. Broom, R., Robinson, J. T., and Schepers, G. W. H., Trans. Mus. Mem., 4 (1950).
2. Day, M. H., Nature, 221, 230 (1969).
3. Napier, J. R., Arch. Biol., Liège, 75, Suppl. 673 (1964).
4. Le Gros Clark, W. E., Man-Apes or Ape-Men (Holt, Rinehart, and Winston, New York, 1967).