[255] 'Origin of Species,' pp. 265, 266.

[256] 'Phil. Zool.,' tom. i. p. 121.

[257] 'Phil. Zool.,' tom. i. p. 122.

[258] 'Origin of Species,' pp. 122, 123.

[259] 'Phil. Zool.,' tom. i. p. 123.

[260] 'Phil. Zool.,' tom. i. p. 123.

[261] 'Origin of Species,' chap. xiv.

[262] 'Phil. Zool.,' tom. i. p. 123.

[263] 'Phil. Zool.,' tom. i. p. 140.

[264] Page 142.