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
