342.
[234] Introductory Lecture of February 14, 1870, pp.

24-30, Figs.

1-4.
(Churchill and Sons.) [235] See especially "Animals and Plants under Domestication," vol.ii.
chap.

xviii.
[236] "Origin of Species," 5th edition, pp.

323, 324.
[237] "Animals and Plants under Domestication," vol.ii.p.