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From:
Arthur John Edward (Arthur) Russell, Lord Arthur Russell
To:
Charles Robert Darwin
Date:
15 Apr 1872
Source of text:
DAR 176: 225
Summary:

Has acquired some French frogs, Rana esculenta, which have mated with R. temporaria, but the spawn has not developed.

Asks whether anyone has successfully crossed frogs and toads.

Contributor:
Darwin Correspondence Project