From:
Charles Robert Darwin
To:
Ernst Philipp August (Ernst) Haeckel
Date:
3 Oct [1869]
Source of text:
Ernst-Haeckel-Haus (Bestand A-Abt. 1: 1–52/23)
Summary:
Mentions views of Sars on species.
EH’s work on Siphonophora.
Contributor:
Darwin Correspondence Project