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Fish drawing from the Upper Rio Negro - Ageneiosus species

Fish drawing of Ageneiosus militaris, made on the Rio Negro in South America, dated April 1852.

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Wallace Letters Online

Letter to Alfred Russel Wallace from the Royal Society, about his Darwin Medal award

View high resolution scans and transcripts of Alfred Russel Wallace's correspondence, including all surviving letters between him and Charles Darwin.

Explore Wallace's correspondence