[156] Compare writer's Variation in the dimensions of lower molars
in man and anthropoid apes, Am. J. Phys. Anthrop., VI, 423-438,
Washington, 1923.
[157] Rivet, P., Recherches sur le prognathisme. L'Anthropologie, XX,
pp. 35, 175; Paris, 1909. XXI, pp. 505, 637, 1910.
[158] Cat. Crania, U. S. Nat. Mus., etc., No. 3. Washington, 1928, 88,
105, 139.
[159] Lower angles mean higher, higher angles lower facial or alveolar
protrusion.