From:
Alexander Agassiz
To:
Charles Robert Darwin
Date:
22 Oct 1870
Source of text:
G. R. Agassiz ed. 1913, p. 113
Summary:
Asks whether he may see CD before leaving England.
Contributor:
Darwin Correspondence Project
From:
Alexander Agassiz
To:
Charles Robert Darwin
Date:
[before 1 June 1871]
Source of text:
DAR 69: A43–6 DAR 89: 29–31
Summary:
Instances of sexual differences in viviparous fishes, suggested by reading chapters on sexual selection [in Descent] and by Mivart’s Genesis of species.
Notes on echinoderms.
Contributor:
Darwin Correspondence Project
From:
Alexander Agassiz
To:
Charles Robert Darwin
Date:
4 Mar 1872
Source of text:
G. R. Agassiz ed. 1913, p. 119
Summary:
Thanks for new [6th] edition of Origin.
Is working on Echini.
The more material he gets the less easy it is to diagnose a genus or species. Has little doubt that "classification is nothing but the most arbitrary convenient tool, depending upon the material at our command at a special time".
Contributor:
Darwin Correspondence Project
From:
Alexander Agassiz
To:
Charles Robert Darwin
Date:
9 Dec 1872
Source of text:
G. R. Agassiz ed. 1913, pp. 120–1
Summary:
Thanks for Expression.
Has lost a year’s work in the fire that has devastated Boston.
Contributor:
Darwin Correspondence Project