[AE]The late Mr. H. W. Oakley first drew my attention to this snake. Since then Mr. Hammond Tooke has described the facts in Nature, vol. xxxiv. p. 547.
[AF]Nature, vol. xlii. p. 115.
[AG]Since the above was written and sent to press, there has been added, at the Natural History Museum, in the basement hall, a case illustrating the adaptation of external colouring to the conditions of life. All the animals, birds, etc., there grouped were collected in the Egyptian desert, whence also the rocks, stones, and sand on which they are placed were brought. Though somewhat crowded, they exemplify protective resemblance very well.
[AH]I have to thank Mr. H. A. Francis for drawing my attention to this, and showing me the insects in his cabinet.
[AI]"Colours of Animals," p. 73.
[AJ]"Origin of Species," p. 161.
[AK]"Descent of Man," summary of chap. xvi. pt. ii.
[AL]Ibid. chap. xiv.
[AM]"Darwinism," p. 108.
[AN]Its importance in artificial selection was emphasized by Darwin: "The prevention of free crossing, and the intentional matching of individual animals, are the corner-stones of the breeder's art" ("Animals and Plants under Domestication," ii. 62).