Page:Darwinism by Alfred Wallace 1889.djvu/450

 produced by some other power, then natural selection is not wanted. If, on the other hand, both fit and unfit are produced, and natural selection decides between them, that is pure Darwinism, and Mr. Cope's theories have added nothing to it.



Another eminent naturalist, Professor Karl Semper of Würzburg, also adopts the view of the direct transforming power of the environment, and has brought together an