40 PRIMEVAL MAN. 



different species, even when standing in close 

 natural relation to each, other, is absolutely 

 forbidden by the sentence of sterility which 

 Nature pronounces and enforces upon all 

 hybrid offspring. And so it results that Man 

 has never seen the origin of any species. 

 Creation by birth is the only kind of creation 

 he has ever seen ; and from this kind of 

 creation he has never seen a new species 

 come. And yet he does know (for this the 

 science of Palaeontology has most certainly 

 revealed), that the introduction of new species 

 has been a work carried on constantly and 

 continuously during vast but unknown periods 

 of time. The whole face of animated nature 

 has been changed, not once, but frequently; 

 not suddenly for the most part, perhaps not 



