40 THE RISE OF MAN. 



orous animals of low intelligence which invited him to 

 develop into a hunter and to change his nature into that 

 of an omnivorous which distinguishes man from the apes. 

 The country is partly wooded and partly prairie-land and 

 so encouraged the upright walk. The hollow trees con- 

 tained plenty of honey, and the Australian bee lacks a 

 sting. It is further peculiar that the dog, at all times 

 closely allied to man, was his only companion on the 

 Australian continent. 



While favorable conditions are often productive of 



OLD MAN'S SKULL FOUND AT CRO-MAGNON. 3893 



After Broca's Conference sr les Troglodytes de la VezZre. (Le- 

 normant's Histoire ancienne de V orient, I, 145.) 



good results, we would point out that the highest develop- 

 ment is generally not obtained by them alone, but by a 

 change from favorable to unfavorable. Favorable condi- 

 tions develop new varieties with certain free exuberance, 

 and give them a chance to establish new qualities, while 

 unfavorable conditions put individuals to the test and 

 select those that are fittest to survive. While the lower 

 type of mankind (the man-ape) appears to have been 

 developed in a Southern climate, it seems almost certain 



