M. L. TiLDESLEY 
209 
Ordinates below Ny 
Occipital point 
X 
Sub-orbital point 
8 
9 
yi 
7i 
X from 7 
y 
X from 7 
y 
X from N 
y 
Auricular point 
Opisthion 
Inion 
Basion 
X from 7 
y 
X from 7 
yl 
NI 
7 Bas. 
N Bas. 
Alveolar point 
Nose 
Palate 
to A.P. 
Bas. to A.P. 
NL 
NL' 
Max. nasal subtense 
Max. subtense 
X from N 
y 
X from A.P. 
y 
In addition to these measurements 1 took a number of others which were not 
used in construction of the type. This was done with a double object: partly to 
compare their means with the corresponding measurements that were read off 
from the type skull and thus test the accuracy with which extra values are given 
by the type (theoretically they are not bound to be exactly the same) ; partlv 
for comparative purposes. They are as follows: 
Lengths. 
\0p. 
N\ 
j3 subtense to N\ 
01 
P subtense to GI 
X from N 
y 
X from G y 
! 
Angles. 
0= L^GI 
</>'=/ ^NI 
Ai 
N L 
Bl 
P L 
