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Günther, Albert in correspondent 
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From:
Charles Robert Darwin
To:
Albrecht Carl Ludwig Gotthilf (Albert) Günther
Date:
7 Dec [1867]
Source of text:
Shrewsbury School, Taylor Library
Summary:

Sends his photograph.

Asks for any information of well-marked sexual differences in snakes, batrachians, or lizards. The rattlesnakes at the Zoological Garden differ considerably in colour.

Contributor:
Darwin Correspondence Project
From:
Albrecht Carl Ludwig Gotthilf (Albert) Günther
To:
Charles Robert Darwin
Date:
19 Dec 1867
Source of text:
DAR 82: B72–4
Summary:

Sexual differences in reptiles, especially Indian [see A. Günther, The reptiles of British India (1864)].

Contributor:
Darwin Correspondence Project
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From:
Charles Robert Darwin
To:
Albrecht Carl Ludwig Gotthilf (Albert) Günther
Date:
21 Dec [1867]
Source of text:
American Philosophical Society (Mss.B.D25.339)
Summary:

Thanks AG for information.

Contributor:
Darwin Correspondence Project
From:
Albrecht Carl Ludwig Gotthilf (Albert) Günther
To:
Charles Robert Darwin
Date:
[late Dec 1867 or early Jan 1868]
Source of text:
DAR 82: B75
Summary:

The Cyprinodontidae family of fishes exhibits sexual differences as remarkable as any in reptiles or birds [Descent 2: 7, 9–10].

Contributor:
Darwin Correspondence Project
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