Arctic fox skulls and jaws from Ightham Fissure, near Maidstone.
Date 1866
Source A monograph of the British pleistocene mammalia
Author William Boyd Dawkins, Sir, 1838-1929; et. al.
Source: https://commons.wikimedia.org/wiki/File:British_Pleistocene_Mammalia_(1866)_Arctic_Fox_Cranium.png

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.