Although the syndrome of the superior cerebellar artery is well recognized clinically, only eight reports appear in the literature,1representing a total of 22 cases since the first description by Mills,1ain 1908. There is a particular paucity of cases in which this vessel has been involved with reasonable selectivity and which offer adequate opportunity for clinical observations with subsequent postmortem confirmation. On this account there has arisen considerable speculation regarding certain anatomic and functional problems, and the present case is reported with the hope of contributing relevant data. Of incidental interest is the fact that this is the first recorded case of occlusion of the superior cerebellar artery occurring as the result of an embolus in a patient with subacute bacterial endocarditis. It should also be noted that death occurred about two months after the apparent onset of the intracranial complication, an interval which made possible the