Pelorus was born of the teeth of the Ismenian Drakon. Pelorus having killed the Drakon planted and sewed the teeth. Pelorus was among those born from the teeth. When Pelorus and the other Spartoi emerged, Kadmos panicked and threw a rock at them. Pelorus and all the others believed one of their own had thrown it. A fight ensued and in the end five survived. The survivors were Ekhion, Pelorus, Udaeus, Hyperenor and Khthonius.