From:
Charles Robert Darwin
To:
Alexander Agassiz
Date:
10 Sept [1871 or 1873]
Source of text:
DAR 143: 9
Summary:
Discusses exchange of books.
Contributor:
Darwin Correspondence Project
Discusses exchange of books.
CD is interested in the gradation of character in the lamellae of the beaks of ducks. He finds that they are less developed or prominent in the common duck and goose than in true ducks. Is OS able to provide him with any information on this subject?