• Darwin Archive | 'Descent of man': portfolios | 'Descent of man': first edition, 1871, and 'Insectivorous Plants' | 'Descent of man' first edition: sections relating to 'Sexual selection' and 'Invertebrates', 1860 - 1870 | Invertebrates-26 Note, 1868-10-12 | With a different spec...., 1868-10-12

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