The Foundations of the Origin of Species / Two Essays written in 1842 and 1844

by Charles Darwin

[{250}] Var. under Dom., Ed. ii. vol. II. p. 148.

[{251}] Quoted in the Origin, Ed. i. p. 9.

[{252}] See Var. under Dom., Ed. ii. vol. II. p. 147.

[{253}] Var. under Dom., Ed. ii. vol. II. p. 89.

[{254}] See Var. under Dom., Ed. ii. vol. II. p. 147.

[{255}] Origin, Ed. i. p. 267, vi. p. 392. This is the principle experimentally investigated in the author’s Cross-and Self-Fertilisation.

[{256}] Origin, Ed. i. p. 268, vi. p. 398.

[{257}] «Notes in original.» Mere difference of structure no guide to what will or will not cross. First step gained by races keeping apart. «It is not clear where these notes were meant to go.»

[{258}] Origin, Ed. i. p. 272, vi. p. 404.

[{259}] This section seems not to correspond closely with any in the Origin, Ed. i.; in some points it resembles pp. 15, 16, also the section on analogous variation in distinct species, Origin, Ed. i. p. 159, vi. p. 194.