xxviu CONTENTS 



PAGE 



Origin of Nerve-Fibres and their Vicarious Action . . 353 



The Acquisition and Inheritance of Peculiarities of Voice and 



Speech, and the Speech of Animals . . .362 



Concluding Remarks . . . . .377 



SECTION VIII 



THE IDEA OF ORGANIC GROWTH THE LAW OF ORGANIC FORM 



RECRESCENCE 379 



The Idea of Organic Growth . . . ,379 



Crossing and Selection as Indirect Causes of Growth . . 383 



The Law of Organic Form : Its Application to the Form and 



Structure of Plants . . . . .384 



The Recrescence of Lost Parts as an Example of Organic Growth 389 

 Conclusion ....... 409 



APPENDIX 



On THE Idea of the Individual in the Animal Kingdom . 413 



