Orange-tip butterfly at rest imitates a flower.
The argus pheasant cannot be explained by natural selection.
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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.
Orange-tip butterfly at rest imitates a flower.
The argus pheasant cannot be explained by natural selection.
Thanks for RAvK’s work [Anatomisch-systematische Beschreibung der Alcyonarien, pt 1, Die Pennatuliden (1870)].
Asks whether muscles to quills of porcupine are striped. Are they homologous to muscles of ordinary hairs? Could unstriped muscles develop into striped?
Sends maps of U. S. Far West for CD to follow explorations.
When CD comes to London in ten days, he will "immediately call on you and explain why I cannot at once answer your question".