The patient’s speech showed considerable defect. Words were pronounced slowly with slurring and tripping especially of the labials. Orientation perfect. School knowledge well retained. The easier arithmetical problems were accurately performed. Memory imperfect for minor recent events. Estimations of space and time often very imperfect. Variability of mood, sometimes euphoric, sometimes tearful and irritable. Occasional expansive estimates of personal powers (“Can lift three five-hundred pound weights with one finger”). Indistinct expansive financial ideas. The patient continued oriented, euphoric, expansive, untidy, till October, 1905, but on October 12 developed an infection at the site of a callus on the sole of the foot and died with pyemic symptoms, October 17. =Post Mortem Findings.= The =cause of death= was streptococcus septicemia with acute ulcerative colitis, acute splenitis, bilateral purulent pleuritis, multiple infarctions of lungs. There were no signs of =chronic disease outside the nervous system= except a moderate thickening of the mitral valves, and slight dural adhesions. The brain weighed 1450 grams. The vessels at the base showed a slight degree of sclerosis. There was a slight opacity of the frontal, parietal, and temporal pia overlying slightly atrophied convolutions, whose surfaces showed in a few places slight cuppings. The ependyma over the thalami and the floor of the fourth ventricle was finely roughened. The spinal cord showed a typical TABES DORSALIS. Although we probably cannot regard either Case 42 or Case 43 as a case of paretic neurosyphilis, and although it must remain doubtful whether they are cases of any form whatever of neurosyphilis (in the absence of the modern tests), yet it seems clear that both these cases may very well have been cases of neurosyphilis on account of the existence of a definite tabetic process in each. The symptoms of these cases, like those of Cases 38 to 41, suggest how difficult it must be _to make a clinical diagnosis of general paresis safely without employing available laboratory tests_. Yet how frequently in the past have neurologists brought data concerning various phenomena in long series of so-called paretics in which the error of diagnosis was certainly between 5 and 15% and frequently still greater. The entire question of the symptomatology of paretic and non-paretic neurosyphilis, therefore, needs re-opening and revision. =CEREBRAL GLIOSIS (probably non-syphilitic) producing the clinical picture of paretic neurosyphilis (“general paresis”). Autopsy.=