30 NATURAL SCIENCE [July 1898 
when we picture to ourselves the nature of the altered character 
in the struggle for existence which the new race introduced 
with their swift movements, their gaping jaws and pointed teeth, 
it is not astonishing that some forms should develop armour, even 
at the risk of degeneration. On these points, however, we may 
hope for further light from palaeontological research. 
This, then, brings my argument to a close. J am aware that 
many of the points might have been more elaborately treated, but 
enough, I think, is contained in this sketch to serve all present 
purposes. The argument is quite clear, and so far as I can see 
consequential. What it is worth is another matter. I, for one, 
suspend my judgment. 
Henry M. BERNARD. 
STREATHAM, S. W. 
