Non metrical cranial traits in the Hokkaido Ainu and the Northern Japanese of recent times

Abstract

Twenty three non metrical cranial traits were investigated in two recent Ainu and two recent Japanese population samples of Northern Japan origin. The incidences of the traits were analyzed with respect to sex and group differences. The results were discussed chiefly from the viewpoint of hyperostotic hypostotic dichotomy advocated by Ossenberg (1970), taking age differences and mutual correlations affecting the trait incidences into consideration. The incidence pattern in each population was discussed on the basis of all the 23 traits examined. (Journal received: November 6, 1975).