The fact that the American Neurological Association entrusted to me the chairmanship of this forty-eighth annual meeting places on me the responsibility of opening the session with some pertinent remarks. I would have these take the form of an attempt to answer a question which I consider of great importance to us, namely: How can we state clearly and simply what constitutes the field of neuropsychiatry? At this time there is especial need for clearness on this subject. Ours has always been a very responsible field, but today it is all the more responsible since the war has added large numbers of victims of neuropsychiatric disorders. Members of this organization, among them Thomas W. Salmon and our much lamented Pearce Bailey, shaped a definite neuropsychiatric domain. For the first time in the history of the country psychiatrists and neurologists cast their lot together in a remarkable unitary organization. Noteworthy immediate