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-Col. R.A.M.C. ABOUT 18 months ago I was able to present to this Section with my colleague, Colonel Lister, certain clinical observations on the disturbances of vision produced by gunshot injuries of the visual cortex and of the optic radiations. From these we drew certain conclusions on the cortical representation of the retina, and particularly on the segmental correspondence of different areas of the retina with separate zones of the visual cortex. Our chief conclusions were:1. The upper half of each retina is represented in the dorsal, and the lower in the ventral part of each visual area.2. The centre for macular or central vision lies in the posterior extremities of the visual areas, probably in the margins and the lateral surfaces of the occipital poles. The macular region has not a bilateral representation.3. The centre for vision subserved by the periphery of the retinae is probably situated in the anterior ends of the visual areas, and the serial concentric zones of the retina from the macula to the periphery

SINCE the year 1893, when Marie [8] collated the cases which had been previously published by Fraser, Nonne, Sanger Brown, and Klippel and Durante. and formulated the conclusion that they all belonged to the same form of disease, for which he proposed the title L'Mrido-ataxie ceribelleuse, the subject of primary disease of the cerebellum has attracted considerable attention, and the title proposed by Marie has been adopted in many textbooks as that of a definite clinical type of disease. At the date of Marie's paper, in only two of the cases to which he referred had the nervous system been examined after death, in one of those reported by Nonne and in one member of Fraser's family ; but since then the three cases recorded by Klippel and Durante and three members of the remarkable family which has been described by Sanger Brown have died, and the central nervous system of each has been submitted to a careful anatomical examination. In none of these cases, however, was any definite disease of the cerebellum found ; in fact, disease of the cerebellum has been demonstrated in one only of the cases on which Marie's original paper was based, namely, in Fraser's. A certain number of cases of primary disease of the cerebellum, some familial or hereditary, others sporadic, in which the nature of the disease has been determined by post-mortem examination, have, however, been recorded.