Official websites use .gov A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Image of p. 96-97 from Darwin's Variation of animals and plants under domestication. Contains an illustration of a domestic pig showing unique jaw appendages.
Copyright:
The National Library of Medicine believes this item to be in the public domain. (More information)
Related Title(s):
Rewriting the book of nature and Is part of: Variation of animals and plants under domestication; See related catalog record: 0246477