[{270}] «Note in original.» Certainly «two pages in the MS.» ought to be here introduced, viz., difficulty in forming such organ, as eye, by selection. «In the Origin, Ed. i., a chapter on Difficulties on Theory follows that on Laws of Variation, and precedes that on Instinct: this was also the arrangement in the Essay of 1842; whereas in the present Essay Instinct follows Variation and precedes Difficulties.»
[{271}] A similar proviso occurs in the chapter on instinct in Origin, Ed. i. p. 207, vi. p. 319.
[{272}] The discussion occurs later in Chapter VII of the Origin, Ed. i. than in the present Essay, where moreover it is fuller in some respects.
[{273}] In the margin occurs the name of Poeppig. In Var. under Dom., Ed. ii. vol. I. p. 28, the reference to Poeppig on the Cuban dogs contains no mention of the wildness of their offspring.
[{274}] «Note in original.» Several authors.
[{275}] In the margin “Hogg” occurs as authority for this fact. For the reference, see p. 17, note 4.
[{276}] In the Origin, Ed. i., he speaks more decidedly against the belief that instincts are hereditary habits, see for instance pp. 209, 214, Ed. vi. pp. 321, 327. He allows, however, something to habit (p. 216).
[{277}] A suggestion of Hering’s and S. Butler’s views on memory and inheritance. It is not, however, implied that Darwin was inclined to accept these opinions.
[{278}] Lord Brougham’s Dissertations on Subjects of Science, etc., 1839, p. 27.
[{279}] This case is more briefly given in the Origin, Ed. i. p. 213, vi. p. 326. The simile of the butterfly occurs there also.