observers, Bolton's measurements antedating those of Shaw by one year. The values observed by Shaw show the following differences from those observed by Bolton:
1. Length of head . . . . + 2.3
2. Breadth of head...+ 1.4
3. Breadth of face. . . . + 4.1
4. Height of face . . . . − 0.6
5. Height of nose.... − 0.1
6. Breadth of nose . . . + 1.3
These values suggest a difference in method only in the fourth and fifth measurements which, instead of showing an increase due to growth, show a decrease. It would seem, therefore, that, among children, Shaw made these two measurements smaller than Bolton. Since Bolton had an extended practice under my personal supervision, particularly in measuring children, in Worcester, Mass., I regard his measurements as perfectly trustworthy. The averages of adult males do not show the same differences. This may be due to the fact that the location of the naso-frontal suture is much more easily ascertained in this case than in children and women.
On the whole it seems justifiable to treat both observers as following the same methods. If this is admitted we may suppose that the difference in breadth of face between the Shoshonean tribes of Utah and of Colorado does really exist. In all other respects the various tribes represent a uniform type, as shown by the following table of averages:
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The whole series is distributed as follows:
am. anth. n.s., i—48
