From:
Charles Robert Darwin
To:
Bourchier Wrey Savile
Date:
[before 8 Oct 1881]
Source of text:
Record n.s. 1 (1882): 149
Summary:
There is ‘some gradation in perfection with mammals in the mammery glands’. Discusses milk secretion in Echidna. Instances a fish in which the ova hatch in a sack on the male and the young feed on mucus secreted by the sack lining; ‘here … we see what might be the commencement of a simple mammery gland’.
Contributor:
Darwin Correspondence Project