XL] SPECIFIC GENESIS. 275 



organism as a unit, and of the entire organic world as a 

 whole. 



It is "believed : That this conception of an internal 

 innate force will ever remain necessary, however much its 

 subordinate processes and actions may become explicable. 

 That by such a force, from time to time, new species are 

 manifested by ordinary generation, just as Pavo nigripennis 

 appeared suddenly, these new forms not being monstrosi- 

 ties but harmonious self-consistent wholes. That thus, as 

 specific distinctness is manifested by obscure sexual con- 

 ditions, so in obscure sexual modifications specific distinc- 

 tions arise. 



That these " jumps " are considerable in comparison 

 with the minute variations of "Natural Selection" are 

 in fact sensible steps, such as discriminate species from 

 species. 



That the latent tendency which exists to these sudden 

 evolutions is determined to action by the stimulus of 

 external conditions. 



That " Natural Selection " rigorously destroys monstro- 

 sities, and abortive and feeble attempts at the performance 

 of the evolutionary process. 



That "Natural Selection" removes the antecedent species 

 rapidly when the new one evolved is more in harmony 

 with surrounding conditions. 



That " Natural Selection " favours and develops useful 

 variations, though it is impotent to originate them or to 

 erect the physiological barrier which seems to exist be- 

 tween species. 



By some such conception as this, the difficulties here 

 enumerated, which beset the theory of "Natural Selection" 

 pure and simple, are to be got over. 



T 2 



