Varicosity Of The Veins Of The Pia Mater is an important condition. It has been frequently noticed in the case of drunkards, and more especially after repeated attacks of delirium tremens, and is often combined with cerebral atrophy. The venous trunks of the infiltrated swollen pia mater on the convexity of the hemispheres which open into the superior longitudinal sinus, appear to be simply dilated below the turbid and thickened arachnoid; in the direction of their ramifications, the vessels present, however, a very peculiar appearance, being elongated, and more or less twisted into intestine-like circumvolutions, or even spirally-twisted coils. Similar dilatations not unfrequently affect the veins of the choroid plexus.