An invitation from the Editors to contribute to 'Studies of Brain Functions' with a monograph on the parietal lobe of fers me an opportunity to present in a concentrated form my studies on this part of the brain from a period of some what over a decade. The parietal lobe, notably its posterior part, is a very complex neural system whose functions I have been able to study only superficially and without ex tensive coverage of all its parts. Therefore I did not want to limit myself entirely to my own work but found the task of writing more interesti'ng by including sections reviewing rel evant...