34 KANSAS ACADEMY OF SCIENCE. 
regions and could successfully compete; but that portion which was driven down 
the western coast of North America came in contact with a flora better suited to 
the conditions, and so was exterminated, with exception of such relics of the 
past as the grand sequoias, which, however, cannot long survive. I might go on 
indefinitely with a tiresome enumeration of facts, but I think I have given enough 
to indicate, in a genera] way, the scope of ecology. 
