[49]. C. Darwin, ‘Variation of Animals and Plants under Domestication.’ Vol. I.
[50]. Compare ‘Der thierische Wille,’ Leipzig, 1880.
[51]. Steller’s interesting account of the Sea-cow (Rhytina Stelleri) proves that this suggestion is valid. This large mammal was living in great numbers in Behring Strait at the end of the last century, but has since been entirely exterminated by man. Steller, who was compelled by shipwreck to remain in the locality for a whole year, tells us that the animals were at first without any fear of man, so that they could be approached in boats and could thus be killed. After a few months however the survivors became wary, and did not allow Steller’s men to approach them, so that they were difficult to catch.—A. W., 1888.
[52]. Compare Schneider, ‘Der thierische Wille.’
[53]. [The author refers to the Academy of Arts at Munich. S. S.]
[54]. Compare Darwin’s ‘Descent of Man.’
[55]. ‘Studien zur Descendenztheorie, I. Ueber den Saison-Dimorphismus der Schmetterlinge.’ Leipzig, 1875. English edition translated and edited by Professor Meldola, ‘Studies in the Theory of Descent,’ Part I.
[56]. The colours which have been called forth by sexual selection must also be included here.
[57]. Wilhelm Roux, ‘Der Kampf der Theile im Organismus.’ Leipzig, 1881.
[58]. Consult ‘Studien zur Descendenztheorie, IV. Über die mechanische Auffassung der Natur,’ p. 303, etc. Translated and edited by Professor Meldola; see ‘Studies in the Theory of Descent,’ p. 677, &c.