Search: Darwin, C. R. in correspondent 
Weismann, August in correspondent 
1870-1879::1875 in date 
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From:
Charles Robert Darwin
To:
Leopold Friedrich August (August) Weismann
Date:
1 and 4 May 1875
Source of text:
DAR 148: 344
Summary:

Comments on AW’s work [Studien zur Descendenz-Theorie, vol. 1 (1875)].

On seasonal dimorphism in Lepidoptera in relation to sexual selection.

Discusses evolutionary reversion.

Comments on birds’ avoiding brightly coloured caterpillars. Offers references on subject.

Alpheus Hyatt says Franz Hilgendorf mistaken [about Planorbis multiformis].

Quotes from letter from J. J. Weir on birds’ rejection of brightly-coloured caterpillars.

Contributor:
Darwin Correspondence Project
From:
Charles Robert Darwin
To:
Leopold Friedrich August (August) Weismann
Date:
6 Dec 1875
Source of text:
DAR 148: 345
Summary:

Comments on AW’s essay [on "Axolotl", Z. Wiss. Zool. 25 (suppl.) (1875): 297–342] with respect to evolutionary reversion. Peloric flowers must also be considered reversion.

Contributor:
Darwin Correspondence Project