Orange-tip butterfly at rest imitates a flower.
The argus pheasant cannot be explained by natural selection.
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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?
Asks about birds erecting feathers when enraged or frightened. Interested in examples of expression in birds and animals.
Tells of the sheldrake dancing on tidal sands to make worms come out.
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".