vi'ii . Note. 



to arrange the material that passed into my hands 

 without adding anything of importance thereto. The 

 substance of Chapters V and VI is therefore entirely 

 the author's : even the phraseology is his ; the arrange- 

 ment only is by another hand. 



Such parts of the Preface as more particularly 

 refer to Isolation and Physiological Selection are 

 reserved for publication in Part III. A year or more 

 must elapse before that part will be ready for 

 publication. 



Mr. F. Howard Collins has, as a kindly tribute to 

 the memory of the author, read through the proofs. 

 Messrs. F. Darwin, F. Galton, H. Seebohm, and others, 

 have rendered incidental assistance. After much 

 search I am unable to give the references to one or 

 two passages. 



I have allowed a too flattering reference to myself 

 to stand, in accordance with a particular injunction of 

 Mr. Romanes given shortly before that sad day on 

 which he died, leaving many to mourn the loss of 

 a personal friend most bright, lovable, and generous- 

 hearted, and thousands to regret that the hand which 

 had written so much for them would write for them 

 no more. 



C. Ll. M. 



University College, Bristol, 

 April, 1894. 



