Some time ago I drew a blockdiagram to illustrate the structure of part of the Bergamo Alps which, moreover, I believe to be representative of the whole of this region. During a discussion of this tectonogram with Prof. Dr. B. G. Escher, he pointed out the great resemblance between the structure of these Alps and that of the North-West Highlands of Scotland. He advised me to attempt a more detailed study of this comparison. I wish to express my sincere thanks to Professor Escher for the generous manner in which he allowed me to make use of his suggestion in the following paper. Leiden, June 18th 1930.