PREFACE, vii 
cation of Dr. Felder’s “ Voyage of the Novara” (Lepi- 
doptera) in the interval between the reading of my 
paper and its publication, several of my new species 
must have their names changed for those given to 
them by Dr. Felder, and this will explain the want of 
agreement in some cases between the names used 
in this volume and those of the original paper. 
V.—On Instinct In Man anp ANIMALS. 
Not previously published. 
Vi.—Tue Puinosopyy or Birps’ Nests. 
First published in the “ Intellectual Observer,” July, 
1867. Reprinted with considerable emendations and 
additions. 
VIL—A Tuerory or Birps’ Nests ; 
SHOWING THE RELATION OF CERTAIN DIFFERENCES OF 
CoLour IN BIRDS TO THEIR MODE OF NIDIFICATION. 
First published in the “ Journal of Travel and Na- 
tural History” (No. 2), 1868. Now reprinted with 
considerable emendations and additions, by which I 
have endeavoured more clearly to express, and more 
fully to illustrate, my meaning in those parts which 
have been misunderstood by my critics. 
VIIL—Creation sy Law. 
First published in the “Quarterly Journal of 
Science,” October, 1867. Now reprinted with a few 
alterations and additions. 
