AbstractThe study of British Pleistocene mammal faunas has been hampered by the difficulty of telling the difference between the postcranial elements of the often abundant remains of the large bovidsBos primigeniusBojanus, 1827 andBison priscusBojanus, 1827. Here I present qualitative and morphometric criteria wherebyBos primigeniusandBison priscusradii, metacarpals, tibiae, astragali and metatarsals can be told apart using British Pleistocene material.