xvi Contents 



PAGE 



Appendix A. Original Statements of Organic Selection and Ortho- 



plasy ; by H. F. Osborn, C. Lloyd Morgan, and E. B. Poulton . 335 



Appendix B. Other Expositions of Organic Selection and Orthoplasy : 



by F. W. Headley and H. W. Conn 333 



Appendix C. Recent Biology ,-2 



^^^^^ 393 



