224 REPORT ON AN ADDITIONAL COLLECTION OF SKELETAL 
As to the number of segments composing the sacrum, it is found that in 
three-fourths of the cases the bone has five, and in the remainder of the specimens, 
six. In addition there is a tendency in one case (Fig. 8) to assimilation of the 
last lumbar. 
Of the extra segments one is lumbar and four are coccygeal. 
The curvature is more often accentuated in the females than in the males, as 
in whites. As will be seen from the details presented in the next table, it also 
begins high more frequently in the females than in the males. 
The neural canal is defective for the greater part from the fourth, or from 
below the fourth, spinous process downward. This also is most frequently the case 
in whites. 
SACRUM—CHARACTERISTICS 
ARKANSAS | LOUISIANA 
Males Females | Males | Females 
Tp tue 
Segments : 5 | 3 — 6 (1 tending 5 
to assimila- | 
tion of last | 
lumbar | 
6 5 1 2 x 2 
Extra segment is — 1 1 lumbar 2 
coccygeal |1 coccygeal | coccygeal 
Curvature : | 
small -- -- 2 — 
moderate | 3 -- 5 2 
good | -- 2 2 5 
Curvature begins with | 
first | — 1 3 " 
second segment а 1 3 2 
hird segment | — -- 1 ре: 
fourth segment | — — 1 — 
Neural canal exposed | 
from | 
below third spinous 
rocess | -- 1 2 = 
at fourth -- -- 4 4 
below fourth 3 -- 3 2 
at fifth — — 1 1 
below fifth -- 1 = лау 
The Patelle. 
The patellse of the Arkansas and Louisiana skeletons are, as will be noted in 
the measurements given below, generally of moderate dimensions, with an average 
breadth slightly exceeding the height. There is very little difference in the bones 
from the two localities. The patella in the female is smaller in all proportions 
than that in the male; the breadth-height index is quite similar. The right and 
left bones differ but slightly. 
