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. 



E. 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. 



