ries, even from writing the memoirs of my scientific career. This abstinence may have several reasons and I hope that time will come for analysing these motives. But at present, without going back to the details of my curriculum vitae, a benevolent and generous pressure has been put on me. Namely, the Editor-in-Chief of Acta Biologica Hungarica, my good Friend Professor Janos Salanki has asked me to give at least a draft of the main periods of my biography for the volume dedicated to my birthday. I must confess, that at present I don’t have the slightest idea about the character and the dimensions of the volume, further I dont’t possess any information so far who will be the contributors to that volume. Very likely it will be a complete surprise for me! But, of course, I could not turn down Janos Salanki’s kind invitation! Consequently, in making an attempt to construct a large scale sketch of my professional track, I try below to give the broad outlines of four phases of that career.