From:
James Murphy
To:
Charles Robert Darwin
Date:
10 May 1876
Source of text:
DAR 171: 323
Summary:
A reader of Descent offers two items: 1. Masters observed a pericardial fold in humans and other mammals which is a vestigial left superior vena cava;
2. JM suggests the frenum of the human penis became necessary for vis-à-vis copulation when man became bipedal.
Contributor:
Darwin Correspondence Project