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The proportional relationships among the lengths of main limb bones comprising the humerus, radius, tibia and femur of the Jomon people are examined by means of comparison with those of the Kofun and recent Japanese. The disto-proximal indices (the radio-humeral and tibiofemoral) of the Jomon are significantly greater than those of the comparison ages, but the humero-femoral index, as a intermembral, is significantly smaller. Logarithmic plots showing the relation between each two bones, indicate no significant age differences among the inclinations of regression lines corresponding to allometry coefficients. However, significant age differences among the levels of lines were found. According to previous studies, there may be two factors affecting the proportions among limb segments, one biomechanical and the other thermal. The adaptation to mode of life, such as hunting of quick moving animals, appears to be a more reasonable interpretation of the relatively long distal segments (high disto-proximal indices) of the Jomon people.

The internal orbital facial breadth (BIFMO), middle facial breadth (BIZM) and their dimensional relationship in 789 crania from 3 Peruvian and 7 East Asian series were examined to determine a Mongoloid criterion. The results confirmed that BIZM was invariably greater than BIFMO in the Peruvian and East Asian series, and clearly different from the quoted European and African populations (Ducros, 1965). Further discussion, which referred to world population data by Woo and Morant (1934), showed that the relationship between BIZM and BIFMO was useful as a simple racial criterion to distinguish the Mongoloid series, except in special cases such as the Oceanians.

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