APPLICATIONS are invited for the following fellowships : two at the Zoological Station, Naples ; one at the Marine Biological Station, Roscoff (France) ; one at the Central Bureau for the Cultivation of Fungi, Baarn (Netherlands). These fellowships are open to graduate students of biology in its widest sense from universities all over the world. The value of each fellowship will be 750 dollars for students from Europe, and 1,000 dollars for students from outside Europe (travelling and lodging expenses included) ; duration of stay at least eight months. Applications, giving full information concerning the proposed investigations, must reach the executive committee of the International Union of Biological Sciences, c/o Prof. M. J. Sirks, Genetisch Instituut, Huis de Wolf, Haren (Gron.), Netherlands, before October 1, 1947.