Violet gland
（重定向自Supracaudal gland）
The violet gland or supracaudal gland is an important gland located on the upper surface of the tail of certain mammals, including European badgers and canids such as foxes, wolves, and the domestic dog, as well as the domestic cat. Like many other mammalian secretion glands, the violet gland consists of modified sweat glands and sebaceous glands.