--------------------+---------------------+---------------------
| Males | Females
Area +------+-------+------+------+-------+------
| Mean | Mean | Mean | Mean | Mean | Mean
|height|breadth|index |height|breadth|index
--------------------+------+-------+------+------+-------+------
| (13) | (13) | (13) | (13) | (13) | (13)
South and Midwestern| 3.63 | 4.01 |_90.6_| 3.56 | 3.87 |_92.1_
| (6) | (6) | (6) | (6) | (6) | (6)
Northwestern | 3.62 | 4.02 |_90.1_| 3.51 | 3.92 |_89.7_
Northern Arctic and | (5) | (5) | (5) | (5) | (5) | (5)
northeastern | 3.65 | 4.07 |_89.5_| 3.54 | 3.91 |_90.6_
--------------------+------+-------+------+------+-------+------
The group differences in the orbital index of the Eskimo skull are
shown in the next table. They elude a satisfactory explanation,
unless recourse is had to the above suggested theory of normal group
variability within a family. They have about the same range in the
three large areas, which would seem to support this theory.
Group relations are indicated in the cases of Pastolik-Yukon Delta-St.
Michael Island; Point Barrow-Barrow; and Old Igloos-Greenland.