Note {517} — Chapter X · RECAPITULATION AND CONCLUSION
Reading edition
This corresponds to a paragraph in the Origin, Ed. i. p. 483, vi. p. 662, where it is assumed that animals have descended “from at most only four or five progenitors, and plants from an equal or lesser number.” In the Origin, however, the author goes on, Ed. i. p. 484, vi. p. 663: “Analogy would lead me one step further, namely, to the belief that all animals and plants have descended from some one prototype.”