x PREFACE 



One more point deserves notice. Butler often refers 

 in " Life and Habit " to Darwin's " Variations of 

 Animals and Plants under Domestication." When he 

 does so it is always under the name "Plants and 

 Animals." More often still he refers to Darwin's 

 " Origin of Species by means of Natural Selection," 

 terming it at one time " Origin of Species " and at 

 another " Natural Selection," sometimes, as on p. 278, 

 using both names within a few lines of each other. 

 Butler was as a rule scrupulously careful about quota- 

 tions, and I can offer no explanation of this curious 

 confusion of titles. 



R. A. STREATFEILD. 



November, 1910. 



AUTHOR'S PREFACE. 



THE Italics in the passages quoted in this book are 

 generally mine, but I found it almost impossible to 

 call the reader's attention to this upon every occasion. 

 I have done so once or twice, as thinking it necessary 

 in these cases that there should be no mistake ; on the 

 whole, however, I thought it better to content myself 

 with calling attention in a preface to the fact that the 

 author quoted is not, as a general rule, responsible for 

 the Italics. 



S. BUTLER. 



November 13, 1877. 



