Examination of the skulls of 133 Roe deer (123♂, 10♀) from seven areas of England and Scotland has shown that small canine teeth or their alveoli are occasionally found in the upper jaw of both males and females. These teeth do not penetrate the gum and are detected readily only by dissection or preparation of the skull. Evidence for the presence of canine teeth was found in three of the seven populations sampled. It is concluded that the frequency of occurrence in most of the populations examined is very low except in one where it is of the order of 17 %. It is not clear whether the upper canine is represented in both the deciduous and the permanent dentition.