Another case, that of a lady of thirty-eight years, married, suffers from ailurophobia, or fear of cats. This can be traced to the patient’s early childhood. When she was a child her brothers and sisters went through attacks of diphtheria, which was ascribed to infection caused or transmitted by cats. The patient was specially impressed with the danger from cats. Under such training and suggestion given in early childhood, the patient gradually formed a fear of cats. This fear was still more intensified and became a panic when she was put into a dark room and a cat was let loose on the poor victim by her mischievous companions, who knew of the patient’s fear. When the patient had children of her own, she was still more affected by the fear of cats, on account of the subconscious and conscious fear of the possibility of infection transmitted by cats to her children. All those cases were investigated and cured by hypnoidal states. Mr. D., a young man of twenty-five years, was born in Poland. As far as can be ascertained, the parents as well as the brothers and sisters are well. A physical examination of the patient reveals nothing abnormal. There are no sensory, no motor disturbances. He complains of severe headaches, preceded by a feeling of indisposition, depression, vertigo and distress. During the attack there is hyperesthesia to touch, pressure, temperature, and to visual and auditory stimulations. _The patient shivers and looks pale._ The cold experienced during the attack is so intense that the patient has to wrap himself in many blankets, as if suffering from a malarial paroxysm. Fears have strong possession of the patient’s mind. He is afraid to remain in a closed place in the daytime and especially at night. When he has to remain alone at night, he is in an agony of fear, and cannot go to sleep. Every passer-by is regarded as a robber or murderer, and he quakes at the least noise. When walking in the house in the dark, he has the feeling as if someone were after him, and occasionally even experiences the hallucination of some one tugging at his coat. He is mortally afraid of the dead and shuns a funeral. The patient has also a fear of dogs, a kynophobia. The fear is irresistible, and is as involuntary as a reflex.