WHAT IS EVOLUTION? 35 



seem, then, that man must have been introduced, not ? 

 by a process of gradualjevelopment, but in some* 

 abrupt and sudden way^Even Wallace, who has all 

 along adhered to the doctrine of natural selection in 

 its integrity, while he agrees with Darwin that man 

 must be a descendant of apes as to his bodily frame, 1 

 maintains that his higher mental and moral faculties 

 must have had another original 



These considerations have led many of the more 

 logical and thoughtful of the followers of Darwin to 

 the position of supposing, not a gradual, but an inter 

 mittent and sudden development, and this, in the 

 main, in the earliest periods of the history of living 

 beings. In a very able essay by Dr. Alpheus Hyatt, 

 in the Proceedings of the Boston Society of Natural 

 History, this view is very fully stated in its applica 

 tion to animals. On the one hand, Hyatt holds that 

 the biological facts and the geological evidence as it 

 has been stated by Marcou, Le Conte, Barrande, 

 Davidson, and by the author of this work, precludes 

 the idea of slow and uniform change proceeding 

 throughout geological time, and he holds justly that 

 the idea of what he calls a concentrated and accele 

 rated process of evolution, in early geological times, 

 brings the doctrine of development nearer to the posi 

 tion of those great naturalists like Cuvier, Louis | 

 Agassiz, and Gegenbauer, who have denied any genetic! 

 connection between the leading animal types. He 

 1 Darwinism t p. 461. 



c 2 



