| From zoology has arisen the study of transformism, which now dominates the whole of biology. |
| That is the Darwinian part of an explanation of transformism which may be conceded as an hypothesis. |
| That is not quite without logical importance, for it shows that not biology alone has led to the transformism hypothesis. |
| It does not enter into our plan to set down here the proofs of transformism. |
| In no case can true variations claim to be of great importance in problems of transformism. |
| A direct consequence of this theory of embryological origin bears on the question of species transformism. |
