Permanence and Evolution. 133 



come ? How come indifferent, or sometimes 

 noxious, characters to be correlated with others 

 that are useful ? How came it about that 

 animals have to pass through a long period of 

 infancy? Would not the tendency of natural 

 selection be to attenuate this time of weakness 

 and helplessness to nothing ? whereas in man we 

 find it longer than in any of the lower animals. 



Also, after all that has been said by Dar- 

 winians, it remains an enormous difficulty that 

 nothing, or next to nothing, has been discovered 

 which can be interpreted as a vestige of the 

 innumerable fine transitional links which must 

 have existed between species of the same genus, 

 and genera of the same family. 



Connecting links are supposed to have been 

 found between the horse and the tapir, and 

 between Canidae and Insectivora. In such dis- 

 coveries there is evidently great room for 

 conjecture and subjective bias. 



But of the way in which e.g. the various Equi 



