c COMME 
opposed to, that of BA (variability) If, however, one d 
the forces CA (isolation) is coh than DA (heredity), am 
is represented by the line EF, then the evolutionary ires 
tion of the body will be towards Y (divergent evolution). 
And whilst referring to the uniformity of type amongst 
Australian aborigines, it is not to be inferred that there are 
not a number of individual variations in personal appearance, 
for Baldwin Spencer and Gillen remark that, whilst con- 
e 
to cause a divergent evolution from the common type. 
the authors quoted show, the tendency to variability is "Enim 
and it is maintained that that is the initial mgtive powe 
With these few remarks I must draw this address to a 
close by suggesting that an interesting investigation might 
