256 
HAROLD’S DISCUSSIONS. 
not come into competition, unless it be in a very indi¬ 
rect way. The butterfly lias no figlit with the rabbit 
for food, and yet the latter may greatly diminish the 
plants whose nectared blossoms feed the former. 
Thirdly, there is the struggle of all species against 
climate. Severe cold, chilly rains, and sudden ex¬ 
treme changes are very trying to animal and plant 
Fig. 119.—Armadillo. Has covering of bony plates, in which 
he can roll himself for protection. 
life. It is evident that those having even a little 
advantage in these struggles are likely to become the 
parents of future generations. This process Herbert 
Spencer calls the survival of the Attest ”—that is, 
not the Attest in the sense of being the best, but in 
the sense of possessing the characteristics that win 
in the struggle. The raw-boned long-horned Texas 
steer would survive where the well-formed, comely 
thoroughbred would perish. 
