What is a military headdress or cap, used in the British army. It is of fur, with a bag, of the same color as the facings of the regiment, hanging from the top over the right shoulder called?

busby — A military headdress or cap, used in the British army. It is of fur, with a bag, of the same color as the facings of the regiment, hanging from the top over the right shoulder. (Webster's 1913.)