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ANTHROPOLOGY: L. R. SULLIVAN Proc. N. A. S. 
brown, and the skin shows varying shades of brown. The beard, moustache 
and body hair is poorly developed. 
Comparative material for estimating the affinities of the Siouan tribes 
is not abundant. In nearly every measurement and index the averages 
for our series are in very close agreement with the Chippewa (O jib way) 
series of Hrdlicka. Less detailed results of Boas suggest a uniformity of 
type with a majority of the Plains tribes (Blackfoot, Cheyenne, Arapaho, 
Crow, Pawnee) and less certainly with the Micmac, Abenaki, Delaware, 
Iroquois, Ottawa, and Menomini. 
The half-bloods in the series are for the most part the results of the inter- 
marriage of French, Scotch, Irish, and English men with Indian women. 
In the study of skin, hair, and eye color the tests were not sufficiently 
sensitive to bring out any clear cut and certain differences between the 
full-bloods and half-bloods, if such differences exist. In all of these char- 
acters the half-bloods seem to stand very close to the full-bloods. In 
regard to the amount of hair on the face (beard and moustache) the half- 
bloods stand intermediate between the Indians and whites. 
The anthropometric characters bring out two points of interest: First, 
that in general body form and proportions the Sioux Indians are not very 
different from the whites with whom they have mixed. There are prac- 
tically no differences between the full-bloods and half-bloods in absolute 
or relative shoulder height, shoulder width, sitting height, arm length, 
arm reach, and very small differences in the cephalic, facial, and nasal 
indices. Second, by far the most noticeable and consistent differences 
are differences in absolute size. The half-bloods are taller than the full- 
bloods. On the other hand, the full-bloods have the more massive heads, 
faces, and noses. While the relation of these diameters, as expressed by 
indices, are very much alike, the absolute diameters are different. The 
most marked difference is in the width of face. The full-bloods have a 
much wider face than the half-bloods or whites. The height of the face 
of full-bloods is also greater and the area of the face much larger than in the 
half-bloods. It seems that in all those characters in which the Indian 
differs most markedly from the whites, the half-bloods stand nearer to the 
Indians than to the whites. 
In our present investigation we found the half-bloods more variable 
than the full-bloods in stature, shoulder height, sitting height, head length, 
face width, cephalo-facial index, facial index and nasal index. In the re- 
maining twelve of the twenty-one observations the full-bloods were slightly 
more variable. But in nearly every seriation the distribution among the 
half-bloods was more irregular. 
In our correlations we found the closest relationships to exist between 
diameters in the same axis such as stature and arm reach, stature and arm 
length, stature and sitting height, and width of head and width of face. 
A fair degree of correlation exists between gross diameters in opposite 
