-----------------------+----------+-----------+-----------+-----------
| Males | Females
-----------------------+----------+-----------+-----------+-----------
| Narrowest| Broadest| Narrowest| Broadest
| skulls| skulls| skulls| skulls
| (C. I.|(80.6-83.1)|(70.3-74.2)|(80.9-83.8)
|70.7-73.5)| | |
-----------------------+----------+-----------+-----------+-----------
Length | 5.68| 5.58| 5.52| 5.20
| | | |
Breadth | 6.83| 6.77| 6.66| 6.36
| | | |
Index | _83.2_| _82.4_| _82.9_| _82.7_
| | | |
Mean diameter | 6.26| 6.18| 6.09| 5.78
| | | |
Mean cranial diameter | | | |
(cranial module) of | 15.61| 15.49| 14.97| 14.73
same skulls | | | |
| | | |
Percentage relation | | | |
of mean dental arch | | | |
diameter to the mean | _40.1_| _39.8_| _40.7_| _39.2_
diameter of the skull | | | |
| | | |
Length of same skulls | 19.21| 18.10| 18.35| 17.25
| | | |
Percentage relation of | | | |
length of dental arch | _29.5_| _30.8_| _30.1_| _30.1_
to that of skull | | | |
-----------------------+----------+-----------+-----------+-----------
The above figures show several conditions. The first is that the arch
is quite distinctly larger in the narrow than in the broad skulls
in both sexes. The second fact is that the skull (vault) itself is
slightly larger in the narrow-headed. The third is that the length of
the arch is somewhat greater in the narrow and long skulls than it is
in the broad and shorter, relatively to the skull size. The fourth
is that there appears a close correlation, more particularly in the
females, between the length of the arch and that of the skull.