As far as his mental state was concerned, its chief peculiarity was a somewhat childish turn of mind, a _soupçon_ of that psychic infantilism so common in the subjects of tic; in addition, he was of an emotional temperament, and prone to perspire or blush for no valid reason. He was further a victim to a premature baldness which was hereditary in the family, and which may be cited as a physical stigma of degeneration. B. _Eyeball Tics._--The extrinsic muscles of the eye occasionally participate in the tics we have just discussed. Assiduous observation of patients suffering from blinking tics will enable the physician now and then to detect movements of the eyeball behind the lowered upper lid. In the case of F., for instance, with each tic of the lids the eyeballs deviated briskly upwards and to the left. Similarly Miss R. turned her head from right to left at the same time as the eye moved obliquely to the left and in an upward direction. A patient mentioned by Otto Lerch[67] used to open and shut his eyes while rotating the eyeballs and throwing the head back. Occasionally he inclined his trunk to one or other side, accompanying the act with disagreeable little grunts. The eruption of these tics may equally be attributed to some foreign body or minute conjunctival granulation, as was the case with a small child of ten years under our care, who, in spite of the withdrawal of the irritating particle, acquired the trick of tickling the inner surface of his upper lid by rolling his eye about whenever he happened to blink. The delight he took in this trivial manœuvre led to its mechanical reiteration, and was the means eventually of its developing into a tic which required a sufficiently delicate muscle exercise and drill for its repression. Defects in the visual apparatus sometimes induce abnormal movements and attitudes which may become tics if careful examination does not elicit their explanation. Tic of the eyeball is generally associated with other tics, ocular or facial, but it may occur alone and bear a resemblance to nystagmus, a peculiarity we have noticed in a patient perfectly free from any cerebro-spinal disease. It is almost always bilateral, but in some cases of unilateral palpebral tic it is more pronounced on the side of the latter. Fixity of the eyes is characteristic of tonic tics of the extrinsic ocular muscles, and gives a somewhat haggard or maybe merely attentive expression to the countenance. Very frequently it escapes observation, and indeed cannot be considered a tic unless there be an incongruity between it and the ideas at that moment uppermost in the patient's mind. Reference has already been made to the historic example of an ocular tic in the person of Peter the Great. A series of interesting discussions has taken place recently at the Neurological Society of Paris in regard to the question of a tic of elevation of the eyes.