1) We can classify the recent far-east and south-east Asiatics into two groups by the degrees of their cranial height (Basion-bregma height : B. B. H.), the high B. B. H.-group and the low one. The B. B. H. of these races is found becoming lower gradually from the far-east Asiatics to the south-east Asiatics in the following order :the Japanese, the Koreans, the north Chinese, the central Chinese, the French-Indo-Chinese, the Siamese, the Burmese and the Indonesian. But the B. B. H. of these races is comparatively high.
On the other hand, the races such as the Aleut, the Mongolians, all races in India, the Wedda, the Andamanese, who live in the surrounding areas have the lower B. B. H., compared with those live in above mentioned high B. B. H.-group areas, and they belong to the lowest B. B. H.-group in the world.
2) On the ancient far-east Asiatics the literatures show as follows: the ancesters of the north Chinese lived along the Huang-ho since B.C., and in the north part of this area the ancesters of the Mongolian, and in the east-north part the proto-Asiatics. In the souther part, souther central China, the proto south races lived, and in the far south area the Wedda-type races. As a whole, it can be suggested that the north Chinese had spread radially to all directions except north with their mighty spreading forces and pressure.
3) From the results of the investigetion into bones of the ancient far-east Asiatitcs, we can say that the B. B. H. of these races is high, and then the recent north Chinese is constitutionaly almost equal to the ancient one, and the latter was found as the proto-Chinese.
4) I come to the conclusion, that the far-east and south-east Asiatics may be able to be classified into two groups: One is high B. B. H.-group, and the other is low one. The former is surrounded by the latter geographically. As a whole, I hope to determine that the central race of the high B. B. H.group is the north Chinese, and all the, reces which originated from this race have the common character constitutionally to belong to the high B. B. H.-group.
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