The born criminal is an epileptic, inasmuch as he possesses the anatomical, skeletal, physiognomical, psychological, and moral characteristics peculiar to the recognised form of epilepsy, and sometimes also its motorial phenomena, although at rare intervals. More frequently he exhibits its substitutes (vertigo, twitching, sialorrhea, emotional attacks). But the criminal epileptic possesses other characteristics peculiar to himself; in particular, that desire of evil for its own sake, which is unknown to ordinary epileptics. In view of this fact this form of epilepsy must be considered apart from the purely nervous anomaly, both in the clinical diagnosis and the methods of cure and social prophylaxis. Moreover, the nervous anomaly, which in the case of criminals appears on the scene from time to time, accentuating the criminal tendency till it reaches the atavistic form and producing morbid complications which sometimes prove fatal, serves to point out the true nature of the disease and to emphasise the fact that while it is attenuated so far as motor attacks are concerned, it is aggravated on the other hand by criminal impulses, which render the patient semi-immune and permit him a longer and less troubled existence, but provoke a constant brain irritation, which clouds and disturbs his intellectual and moral nature. In order better to understand these two forms of epilepsy, we must recall two analogous forms of another and equally multiform disease, tuberculosis in its forms of quick consumption and scrofula. The etiology is identical and the symptoms frequently alike, but while the latter proceeds very slowly and allows the patient a long life, the former is rapid and severs life in its prime. In motory epilepsy, the irritation is manifested on a sudden, but leaves the mind healthy in the interval, although the attacks may lead to rapid dementia. In criminal epilepsy this irritation does not break out in violent seizures and is compatible with a long life, but it changes the whole physical and psychic complexion of the individual.