[71] Proc.  Linn.  Soc., 1867-8, p. 57.

[72] It is not enough that females should be produced from the males with red feathers, which should be destitute of red feathers; but these females must have a latent tendency to produce such feathers, otherwise they would cause deterioration in the red head-feathers of their male offspring.  Such latent tendency would be shown by their producing the red feathers when old or diseased in their ovaria.

[73] The symbols [male symbol], [female symbol] stand for male and female respectively.

[74] The fifth.

[75] Explained in letter of February 2, 1869. See p. 234.

[76] June, 1867.

[77] “Malay Archipelago.”

[78] “Malay Archipelago.”

[79] The fifth edition, pp. 150-7.

[80] In the Quarterly Review, April, 1869.

[81] Inserted by A.R.W.

[82] “The Descent of Man.”

[83] “The Genesis of Species,” by St. G. Mivart. 1871.

[84] In the Academy, March 15, 1871.

[85] “Mr. Wallace says that the pairing of butterflies is probably determined by the fact that one male is stronger-winged or more pertinacious than the rest, rather than by the choice of the females.  He quotes the case of caterpillars which are brightly coloured and yet sexless.  Mr. Wallace also makes the good criticism that ’The Descent of Man’ consists of two books mixed together.”—­“Life and Letters of Charles Darwin,” iii. 137.

[86] G. Crotch was a well-known coleopterist and official in the University Library at Cambridge.

[87] Spectator, March 11 and 18, 1871.  “With regard to the evolution of conscience the reviewer thinks that Mr. Darwin comes much nearer to the ‘kernel of the psychological problem’ than many of his predecessors.  The second article contains a good discussion of the bearing of the book on the question of design, and concludes by finding in it a vindication of Theism more wonderful than that in Paley’s ’Natural Theology.’”—­“Life and Letters,” iii. 138.

[88] North American Review, Vol. 113, pp. 83, 84.  Chauncey Wright points out that the words omitted are “essential to the point on which he [Mr. Mivart] cites Mr. Darwin’s authority.”  It should be mentioned that the passage from which words are omitted is not given within inverted commas by Mr. Mivart.—­See “Life and Letters of Charles Darwin,” iii. 144.

[89] July, 1871.

[90] A review of Dr. Bree’s book, “An Exposition of Fallacies in the Hypotheses of Mr. Darwin.”—­Nature, July 25, 1872.