On my return from Germany in October 1963, I decided to take the road through Greece so that I could have an opportunity of seeing and examining the skull belonging to fossil man which had been recently discovered at Petralona in the vicinity of Salonica. I learned from the Anatomy Institute of the University of Salonica the whereabouts of the skull, which was the Faculty of Physical Sciences of that University, where it was kept in a locked safe under the care of Professor Dr. P. Kokkoros. I contacted Dr. Kokkoros who was kind enough to show me the skull and who gaye me every facility for examining, measuring and photographing it. I must here record my very grateful thanks to him for all his help and co-operation in this matter. I should also like to thank here Professor Dr. Kokkopos, the Director of the Anatomy Institute, for providing me with the necessary instruments and Dr. P. S. Rentzeperil of the Mineralogy Institute, for showing me and explaining some other fossil remains from the Clemoutsi cave near the village of Petralona.