• Darwin Archive | 'Natural Selection': draft chapters, 1856-1858 | 'Natural selection': further material relating to chapter 4, 1856-1857 | Gyllenhal Insecta Suecica Vol 3 & part of 4 / Genera with 10 species & upwards / Genera with 9 species and downwards (table), 1809-01-01 - 1882-04-30 | Gyllenhal Insecta Suecica Vol 3 & part of 4 / Genera with 10 species & upwards / Genera with 9 species and downwards (table), 1809-01-01 - 1882-04-30

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