He was now able to give a coherent history. It was now January. In the previous September, he had left for Mexico; he was returning when he suddenly fell to the deck, unconscious. After this fall, he had not been well, having had chills and fever. At the Marine Hospital, he had been diagnosed as suffering from malaria, and was given quinine. He had been delirious a short time in the hospital, not being able to recognize his wife, who called. He shortly improved so that his wife was able to take him home. Nevertheless, headache, gastric distress, and intermittent vomiting continued. A spell of confusion took place, two days before admission. The patient tossed about, moaned, and failed to recognize anyone. Malaria of the æstivo-autumnal type was demonstrated in the hospital. The temperature always remained at normal. He was somewhat emaciated and pale. The pupils were small, somewhat unequal, and reacted though poorly to light and distance. The tendon reflexes were lively. The W. R. of the serum was positive, and information from the patient’s physician runs to the effect that there was a syphilitic infection some seven or eight years ago, followed by secondary symptoms, but the patient had refused to take any protracted treatment. The spinal fluid examination was practically negative. =Mentally=, the patient was euphoric, expansive, boastful, and showed a marked emotional instability and considerable memory defect. 1. Can the diagnosis of general paresis be made in Joseph Temple? Certainly the acute confusion and the syncope are consistent enough with the diagnosis, yet the severe malaria makes it seem likely that the phenomena were due to a cerebral attack of malaria, and such occurrences are found in the æstivo-autumnal form of malaria. Yet malaria would hardly explain the euphoria, memory defect, and the pupillary findings, to say nothing of the irritability and the active tendon reflexes. Even if we regard the active tendon reflexes and the irritability as malarial, the other phenomena remain outstanding as exceedingly suspicious of paresis. On the other hand, if we try to support forcibly the diagnosis of general paresis, we are hardly able to explain the negative findings in the spinal fluid. In point of fact, a study of the patient’s past life revealed a story that the mental traits of euphoria, irritability, and memory defect had been characteristic of the patient for many years. In fact, there is some question whether the patient is not really to be regarded as a moron of high grade.