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DCP-LETT-7230

From:
Charles Robert Darwin
To:
Rudolf Albert von Kölliker
Date:
14 June 1870
Source of text:
DAR 146: 22
Summary:

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?

Contributor:
Darwin Correspondence Project

DCP-LETT-7231

From:
Charles Robert Darwin
To:
John Jenner Weir
Date:
14 June [1870]
Source of text:
University of Redlands, Armacost Library
Summary:

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.

Contributor:
Darwin Correspondence Project

DCP-LETT-7233

From:
Charles Robert Darwin
To:
Unidentified
Date:
14 June [1870]
Source of text:
DAR 221.5: 43 (photocopy)
Summary:

When CD comes to London in ten days, he will "immediately call on you and explain why I cannot at once answer your question".

Contributor:
Darwin Correspondence Project
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