Eveline Y. Thomson 
Nasio-gamma Base Line. 
109 
Race 
Angle 
xjB, 
Position as to size 
Egyptian 
46°-2 
43-4 
45-4 
Fourth 
English 
47°- 1 
42-1 
45-2 
Second 
Guanche 
48°- 1 
40-6 
45-3 
Third 
Moriori 
49°-3 
40-5 
471 
Fifth 
Bantu 
49°-8 
40-2 
47-6 
Sixth 
Eskimo 
51°0 
38-7 
48-0 
First 
We see at once from this table that the bregmatic angle has little if any relation 
to size of the skull. It gives absolutely the same order as the relative horizontal 
position of the bregma, and (except for the anomalous Egyptian, which is, however, 
greater than the English and Guanche by a slender difference) the same order as the 
bregmatic height difference. In biometric language we should say that the bregmatic 
angle is highly and negatively correlated with the horizontal position of the bregma, 
and is highly and positively correlated with the vertical position of the bregma. 
These results might be anticipated from its functional form tan~^ iyl^)-: but we 
shall learn little as to racial order from the bregmatic angle. Indeed we might 
even state the more primitive the race the bigger the bregmatic angle. This 
conclusion is amply confirmed by the Cro-Magnon skull which gives : 
Angle xlB„ y/B„ 
55°-2 34-6 49-6 
Thus we must conclude that a high bregmatic angle is the result of a relatively 
forward bregma and is a sign of primitive rather than advanced cranial type. 
The reader must carefully distinguish between a " forward" bregma and a relatively 
large frontal bone. If we take as measure of the latter, the base of the frontal 
bone in proportion to Ny, the order is : 
Congo, Bantu ... 63-1 English ... 61-5 
Egyptian ... 62-5 Cro-Magnon ... 61-0 
Moriori ... 62-1 Guanche ... 60-5 
Eskimo 61-5 
an order, to which it would be difficult to give any interpretation of value. 
When we turn to either the nasio-lambda or the glabella-lambda as base line 
we find none of the above identical order of vertical index, horizontal index and 
bregmatic angle. We do now find that the Moriori have a low instead of a high 
bregmatic angle, but if we were to associate this with a racially primitive condition, 
then the Congo Bantus would stand as the most advanced race in our list judged 
from either base line. As a matter of fact we see the explanation lies in the fact 
that the Moriori have from the nasio-lambda base the relatively least forward, and 
the Bantus the most forward position of the bregma, while the same is nearly 
