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The Charles Darwin Collection
The Darwin Correspondence Project is publishing letters written by and to the naturalist Charles Darwin (1809–1882). Complete transcripts of letters are being made available through the Project’s website (www.darwinproject.ac.uk) after publication in the ongoing print edition of The Correspondence of Charles Darwin (Cambridge University Press 1985–). Metadata and summaries of all known letters (c. 15,000) appear in Ɛpsilon, and the full texts of available letters can also be searched, with links to the full texts.
Has sent FM’s letter on caddis-fly to Nature ["On a frog and caddis-flies", Nature 19 (1879): 462–4].
Has lately found frog that has eggs on its back.
Pupae of caddis-flies living on rocks have lost fringe of hairs on their feet. In species that live in the water these are used for swimming.