11. Chapter 11Birds, flight of, i. 145-6, ii. 25 _et seq._; colour problem of, i. 184, 185, 212, 226-9, 230, 252, 289 (note), 302; polygamous, 194, 199; migration of, ii. 19, 20; instincts of...
12. Chapter 12Hooker, Sir Joseph, birth of, i. 5, 76; on oak trees, 56; and the Darwin-Wallace joint paper, 71, 111, 113, 119, 134, 136, 137, 139; receives the Darwin-Wallace Medal, 117; spee...
18. Chapter 18---- natural, theory of, i. 155, 156, 170 _et seq._, 195 _et seq._, 218, 240, 267, 298, 301, ii. 16-17, 63, 75, 94, 96, 98, 101, 150; discovery of, i. 2, 89-126; anticipations o...
17. Chapter 17Poulton, Prof., and Weismann's "Essays upon Heredity," ii. 44-6; paper on colours of larva, pupa, etc., 54; appointed Hope Professor of Zoology in Oxford University, 57; exposur...
16. Chapter 16"Origin of Species," Darwin's, i. 67, 72, 76-8, 112, 121, 124, 125, 129, 134, 136, 139, 141, 146, 164, 174, 176, 224, 240, 241, 244, 246, 264-5, 271, ii. 1, 2, 77; reviews of, i...