CHARLES DARWIN. 429 
would the pages which we are accustomed to consecrate to the 
memory of our recently deceased associates allow of it. Let 
us note in passing that the succeeding volumes of the series may 
be ranked in two classes, one of which is much more widely 
known than the other. One class is of those which follow up 
the argument for the origination of species through descent 
with modification, or which widen its base and illustrate the 
modus operandi of Natural Selection. Such are the two vol- 
umes on “ Domesticated Animals and Cultivated Plants,” 
illustrating Variation, Inheritance, Reversion, Interbreeding, 
etc.; the volume on the ‘ Descent of Man, and Selection in 
Relation to Sex,” — which extended the hypothesis to its logi- 
eal limits — and that, ‘On the Expression of the Emotions in 
Man and the Lower Animals,” published in 1872, which may 
be regarded as the last of this series. Since then Mr. Dar- 
win appears to have turned from the highest to the lower 
forms of life, and to have entered upon the laborious cultiva- 
tion of new and special fields of investigation, which, although 
prosecuted on the lines of his doctrine and vivified by its 
ideas, might seem to be only incidentally connected with the 
general argument. But it will be found that all these lines 
are convergent. Nor were these altogether new studies. The 
germ of the three volumes upon the Relation of Insects to 
Flowers and its far-reaching consequences, is a little paper, 
published in the year 1858, “On the Agency of Bees in the 
Fertilization of Papilionaceous Flowers, and on the Crossing 
of Kidney Beans; ” the first edition of the volume on “ The 
various Contrivances by which Orchids are Fertilized by In- 
sects” appeared in 1862, thus forming the second volume of 
the whole series; and the two volumes “ On the Effects of 
Cross and Self-Fertilization in the Vegetable Kingdom,” and 
“The different Forms of Flowers on Plants of the same Spe- 
cies,” which, along with the new edition of “The Fertili- 
zation of Orchids,” were all published in 1876 and 1877, 
originated in two or three remarkable papers contributed to 
the “Journal of the Linnzan Society” in 1862 and 1863, but 
are supplemented by additional and protracted experiments. 
The volume on “ Insectivorous Plants,” and the noteworthy 
