TABLE B.—COMPARATIVE VIEW OF MEAN CRANIAL MEASUREMENTS.GroupA = Mound Skull, From Scioto Valley.B = Mound-builders, From Mississippi Valley.C = Toltecan Nations, Including Skulls From the Mounds.D = Barbarous Nations, With Skulls From Ohio Valley.E = American Race, Embracing Barbarous and Toltecan.F = Flat Head Tribes of Oregon.G = Ancient Peruvians.No. = Number of skulls.GroupABCDNo.MEANNo.MEANNo.MEANLongitudinal diameter,6.536.56576.5907Inter-parietal diameter,635.87575.6905.5Vertical diameter,6.235.93575.3905.4Frontal diameter,4.524.3574.4904.3Inter-mastoid arch,16215.65714.99014.6Inter-mastoid line,4.524.45574.1904.2Occipito-frontal arch,13.8213.95713.69014.2Horizontal periphery,19.8219.655719.49019.9Facial angle,81°379° 40ʹ5575° 35ʹ8376° 13ʹInternal capacity,902855776.88782.4GroupEFGNo.MEANNo.MEANNo.MEANLongitudinal diameter,1476.7586.736.8Inter-parietal diameter,1475.558635Vertical diameter,1475.3584.834.8Frontal diameter,1474.3584.934.2Inter-mastoid arch,14714.75814.6313.3Inter-mastoid line,1474.1584.134Occipito-frontal arch,14713.9813.1314.3Horizontal periphery,14719.65820318.8Facial angle,13875° 45ʹ869° 30ʹ367° 20ʹInternal capacity,14479.6879.25373.2
TABLE B.—COMPARATIVE VIEW OF MEAN CRANIAL MEASUREMENTS.
Group
A = Mound Skull, From Scioto Valley.
B = Mound-builders, From Mississippi Valley.
C = Toltecan Nations, Including Skulls From the Mounds.
D = Barbarous Nations, With Skulls From Ohio Valley.
E = American Race, Embracing Barbarous and Toltecan.
F = Flat Head Tribes of Oregon.
G = Ancient Peruvians.
GroupABCDNo.MEANNo.MEANNo.MEANLongitudinal diameter,6.536.56576.5907Inter-parietal diameter,635.87575.6905.5Vertical diameter,6.235.93575.3905.4Frontal diameter,4.524.3574.4904.3Inter-mastoid arch,16215.65714.99014.6Inter-mastoid line,4.524.45574.1904.2Occipito-frontal arch,13.8213.95713.69014.2Horizontal periphery,19.8219.655719.49019.9Facial angle,81°379° 40ʹ5575° 35ʹ8376° 13ʹInternal capacity,902855776.88782.4
Group
A
B
C
D
No.
MEAN
No.
MEAN
No.
MEAN
Longitudinal diameter,
6.5
3
6.56
57
6.5
90
7
Inter-parietal diameter,
6
3
5.87
57
5.6
90
5.5
Vertical diameter,
6.2
3
5.93
57
5.3
90
5.4
Frontal diameter,
4.5
2
4.3
57
4.4
90
4.3
Inter-mastoid arch,
16
2
15.6
57
14.9
90
14.6
Inter-mastoid line,
4.5
2
4.45
57
4.1
90
4.2
Occipito-frontal arch,
13.8
2
13.9
57
13.6
90
14.2
Horizontal periphery,
19.8
2
19.65
57
19.4
90
19.9
Facial angle,
81°
3
79° 40ʹ
55
75° 35ʹ
83
76° 13ʹ
Internal capacity,
90
2
85
57
76.8
87
82.4
GroupEFGNo.MEANNo.MEANNo.MEANLongitudinal diameter,1476.7586.736.8Inter-parietal diameter,1475.558635Vertical diameter,1475.3584.834.8Frontal diameter,1474.3584.934.2Inter-mastoid arch,14714.75814.6313.3Inter-mastoid line,1474.1584.134Occipito-frontal arch,14713.9813.1314.3Horizontal periphery,14719.65820318.8Facial angle,13875° 45ʹ869° 30ʹ367° 20ʹInternal capacity,14479.6879.25373.2
Group
E
F
G
No.
MEAN
No.
MEAN
No.
MEAN
Longitudinal diameter,
147
6.75
8
6.7
3
6.8
Inter-parietal diameter,
147
5.55
8
6
3
5
Vertical diameter,
147
5.35
8
4.8
3
4.8
Frontal diameter,
147
4.35
8
4.9
3
4.2
Inter-mastoid arch,
147
14.75
8
14.6
3
13.3
Inter-mastoid line,
147
4.15
8
4.1
3
4
Occipito-frontal arch,
147
13.9
8
13.1
3
14.3
Horizontal periphery,
147
19.65
8
20
3
18.8
Facial angle,
138
75° 45ʹ
8
69° 30ʹ
3
67° 20ʹ
Internal capacity,
144
79.6
8
79.25
3
73.2