LIST OF DARWIN'S WORKS REFERRED TO 

 IN THE FOOT-NOTES. 



Origin of Species, Sixth Edition, 1872. 



Descent of Man and Selection in Relation to Sex, 1871. 



Variation of Animals and Plants under Domestication, 

 Second Edition, 1875. 



Expression of the Emotions in Man and the Lower Ani- 

 mals, 1872. 



A Monograph of the Cirripedia, Vol. I., 1851 ; Vol. II., 

 1854- 



The Formation of Vegetable Mould through the Action 

 of Earthworms, 1881. 



Naturalist's Voyage around the World, 1860. 



Geological Observations on Volcanic Islands and on 



Parts of South America, Second Edition, 1876. 

 Structure and Distribution of Coral Reefs, Third Edition, 



Fertilization of Orchids, Second Edition, 1877. 



Effects of Cross- and Self-Fertilization, 1876. 



Different Forms of Flowers on Plants of the same Species, 



1877- 



Insectivorous Plants, 1875. 

 Climbing Plants, 1875. 

 Power of Movement in Plants, by Charles and Francis 



Darwin, 1881. 

 Life and Letters of Charles Darwin, by Francis Darwin, 



two vols., 1887. 



