The following description should have been inserted at page 482 in the January number of the Journal.—EDITORDESCRIPTION OP PLATES.PLATE XIX.Figs. 1 2.—Large motor cell in left paracentral lobule showing pulverulent chromatic substance.Polychrome Methylene Blue, section 3 m.Leitz 1-12 Oil Im., Oc. 4.Fig. 3.—Cell of same region from another case, showing more nearly normal arrangement of Nissi bodies.Fig. 4.—Purkinje cell showing considerable chromatolysis.Polychrome Methylene Blue, section 3 m.Leitz 1-12 Oil Im., Oc. 4.Plate XX.Fig. 1.—Miliary aneurism surrounded by round cells and red blood-cells in the softened area of the left temporo-sphenoidal lobe.Section 6½m. Van Gieson stain.Leita, 7 Ob., Oc. 1.Fig. 2.—Cortex of softened area In the same region, showing infiltration with various cells.Section 3 m. Polychrome stain.Leitz 1-12 Oil Im., Oc. 4.Fig. 3 & 4.—Same region.Hæmatoxylin and Eosln stain showing infiltration and newly formed vessels with hemorrhages.Fig. 5.—Vessel from right temporo-sphenoidal lobe showing moderateproliferation of nuclei.Plate XXI.Fig. 1.—Small vessel showing proliferation of nuclei.Right paracentral region.Van Gieson stain.Leitz, Ob. 4, Oc. 3.Fig. 2.—Vessels from left superior frontal region showing moderate fibrous thickening.Section 6½ m. Van Gieson stain.Leitz, Ob. 7, Oc. 3.Figs. 3-4-5-6.—Vessels in cases of brain syphilis showing types of syphiliticchanges. (Inserted for comparison.) Van Gieson stain.Plate Xxii.Figs. 1 & 2.—Cells from right temporal region showing neuroglia nuclei Inpericellular space.Nissl stain.Leitz 1-12 Oil Im., Oc. 4.Fig. 3.—Similar change in right hippocampal region.Same stain and magnification.