IN connexion with the note by G. L. Purser in NATURE of July 24 on ``Succession of Broods of Lebistes'', it has long been known that several of the viviparous fish, such as Lebistes, are fertilized for a long time after one copulation. E. Philippi has described this phenomenon in Glaridichthys1. Johs. Schmidt found it in Lebistes2. He says that he had observed seven broods in succession. I have noted up to eight broods3.