Arctic Foxes Alopex lagopus - original caption cropped out in edit "From photographs by the Scholastic Photographic Agency.
Arctic Foxes.
The lower figure shows the white phase in winter coat; the upper and central figures are probably the same phase in summer dress."
Date 1903
Source Richard Lydekker's Mostly Mammals
Author Scholastic Photographic Agency
Source: https://commons.wikimedia.org/wiki/File:ArcticFoxesLyd.jpg

The Arctic fox (Vulpes lagopus), also known as the white fox, polar fox, or snow fox, is a small fox native to the Arctic regions of the Northern Hemisphere and common throughout the Arctic tundra biome. It is well adapted to living in cold environments. It has a deep thick fur which is brown in summer and white in winter.