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C. R. was 19 years old when photo was taken. The father was a fence-maker. The mother was 30 at the time of the birth of this, the fourth child, and was an epileptic. The paternal grandfather died of cancer; the maternal grandmother of spinal paralysis. A brother of the mother was feeble-minded. One brother and one sister are sound in mind and body; one brother is imbecile. C. was a strong baby, born at full term, though there was deficient animation at birth. Her speech is very simple. She walked at twelve months. When 23 years old she had a spasm followed by extreme mental depression, which lasted a month, after which she burst out with maniacal excitement and attempted to choke herself. She be- came irresponsible, helpless, and had to be fed; she moaned all the time, and became careless and untidy in dress and unclean day and night. She attended school from the time she was nine years old, and did fairly well. She learned to work well in the dining-room, laundry and sewing-room. She had the delusion that her condition was caused