=Microscopic findings= are here presented merely in sufficient detail to establish the diagnosis. The left superior frontal gyrus shows extensive and somewhat irregular cellular and fibrillar gliosis of the plexiform layer, together with an increase of thickened vessels having lymphocytes and plasma cells in their sheaths. The perivascular infiltrations are most extensive in the lower layers of the cortex. The lamination is in places thoroughly obscured, except that representatives of the layer of large external pyramids are almost always demonstrable. The layer of medium-sized pyramids has undergone more numerical loss of elements than have the other layers. Gliosis of white matter. Specimens from the cerebellum show a destructive process of great severity, but a little irregular in extent, affecting chiefly the Purkinje cell belt. The Purkinje cells are often absent throughout one side of a given lamina, and there has ensued a dense accumulation of neuroglia cells along a former Purkinje cell belt, together with a considerable gliosis of the molecular layer. Considerable gliosis of the white matter, both diffuse and perivascular in distribution. Perivascular plasma cell infiltrations as in cerebrum, but largely meningeal or in the white matter. Sections from the corpora striata demonstrate a mild and early granular ependymitis, considerable subependymal gliosis of cellular type, considerable perivascular gliosis in the white portions of the tissue, and a moderate infiltration of perivascular sheaths with pigmented cells, lymphocytes, and plasma cells. There is little evidence of alteration in the nerve cells. Some are unevenly pigmented. =Summary=: We here present a case with numerous and widespread neurosyphilitic lesions. However, the gross cerebral vascular complications of Case 1 (Alice Morton) and of Case 2 (Francis Garfield) are notably absent in James Dixon. Rather atypical (there seems to be _always something atypical in cases of neurosyphilis!_) are the liver lesions and arteritis of the leg, atypical, that is to say, for PARETIC NEUROSYPHILIS. Highly typical of paretic neurosyphilis and almost constant therein is the aortic sclerosis. [Illustration: Apparent new formation of small blood vessel. Photographed by Dr. A. M. Barrett. ] [Illustration: Rod cells (Stäbchenzellen) in paretic neurosyphilis. Photographed by Dr. A. M. Barrett. ] [Illustration: Granular ependymitis—microscopic appearance of a marked example of “sanding” of ventricle. ]