Overview of illustrations
Darwin, C. R. 1859. On the origin of species by means of natural selection, or the preservation of favoured races in the struggle for life. London: John Murray. [1st edition]. Text Images Text & images PDF F373
The Origin of species only had a single illustration, this lithographic diagram by William West demonstrating how the degree of similarities between a number of varieties and species is explained by descent from common ancestors. Compare with the diagrams in Natural selection (and the original manuscript DAR10.2.66). See also Darwin's conjectural diagrams of the development of mammals.
Posthumous editions and foreign translations sometimes had illustrations added, such as these from the Danish translation of 1872. The illustrations are taken from Darwin, C. R. 1868. The variation of animals and plants under domestication. London: John Murray. Volume 1. Text Images Text & images F877.1
Darwin, C. R. 1872. Om Arternes Oprindelse ved Kvalitetsvalg eller ved de heldigst stillede Formers Sejr i Kampen for Tilværelsen. Translated by J. P. Jacobsen. Copenhagen: Gyldendal. Introduction Text Images Text & images F643