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To Rudolf Albert von Kölliker   18 April [1870]

Summary

Has sent off specimens of Virgularia but fears they are in bad state. He could not find his dried specimens. Encloses notes that can be relied upon but may be of little use.

Also encloses a memorandum for Prof. K. G. Semper.

CD thinks Alcide d’Orbigny may have given name of Virgularia pectagonica.

CD enjoyed RAvK’s recent visit [see 7164].

Author:  Charles Robert Darwin
Addressee:  Rudolf Albert von Kölliker
Date:  18 Apr [1870]
Classmark:  John Gittleman (private collection)
Letter no:  DCP-LETT-7166A

To R. A. von Kölliker   14 June 1870

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?

Author:  Charles Robert Darwin
Addressee:  Rudolf Albert von Kölliker
Date:  14 June 1870
Classmark:  DAR 146: 22
Letter no:  DCP-LETT-7230
Document type
letter (2)
Author
Addressee
Correspondent
Darwin, C. R. (2)
Kölliker, R. A. von[X]
Date
1870 (2)
letter