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SYSTEMS OF CLASSIFICATION
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to some extent, in the hair. Hrdlicka[1] has formulated a convenient statement of the problem, which may serve as our point of departure:—
Fig. 96. Bodily Forms from Various Races—Negroes, Australians, and United States Soldiers, from Thompson, 1880. I; Amherst Students, from Hitchcock, 1888. I. There is some doubt as to the accuracy of the United States Army data, but the variation shown here serves to emphasize the homogeneity of the New World types
The conclusions, therefore, are: the American natives represent in the main a single stem or strain of people, one homotype; this stem is identical with that of the yellow-brown races of Asia and Polynesia; and the main immigration of the Americans has taken place, in the main, at least, gradually and by the northwestern route in the earlier part of the recent period, after man had reached a relatively high stage of physical development and multiple secondary differentiations. The immigration, in all probability, was a dribbling and prolonged overflow, likely due to pressure from behind, or want, and a search for better hunting and fishing grounds in the direction where no resistance of man as yet existed. This was followed by
