"--"My Life," i. 254-7.
[18] "On the Law which has regulated the Introduction of
Species."--_Ann. and Mag. of Natural History_, 2nd Series, 1855, xvi.
184.
[19] "Life of Charles Darwin" (one-vol. Edit.), p. 171.
[20] "Life of Charles Darwin," (one-vol. Edit.), p. 40,
[21] _See post_, p. 112.
[22] "My Life," i. 359.
[23] "My Life," i. 361-3.
[24] It will be remembered, that Darwin died in April, 1882, twenty-six
years previously.
[25] "Life and Letters of Charles Darwin," ii. 188.
[26] "The Herbert Spencer Lecture," delivered at the Museum, December 8,
1910. (Clarendon Press, Oxford.)
[27] "My Life," ii. 23-4.
[28] "On the Law which has regulated the Introduction of New
Species."--_Ann. and Mag. of Nat. Hist._, 1855. The law is thus stated
by Wallace: "Every species has come into existence coincident both in
time and space with a pre-existing closely-allied species."
[29] "The Origin of Species."
[30] "The Origin of Species."
[31] First Edit., 1859, pp. 1, 2.
[32] "On the Tendency of Species to form Varieties and on the
Perpetuation of Varieties and Species by Natural Means of Selection.
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