There is a class of hypnotic memory phenomena which acquire additional importance because of the bearing they have upon the _psycho-genesis_ of certain pathological conditions. They show the conservation of the details of an episode in their original chronological order with an exactness that is beyond the powers of voluntary memory to reproduce. These phenomena consist of the realistic reproduction of certain emotional episodes which as a whole may or may not be forgotten. The reproduction is realistic in the sense that the episodes are acted over again by the individual as if once more he were actually experiencing them. Apparently every detail is reproduced, including the emotion with its facial expressions and its other physiological manifestations, and pathological disturbances like pain, paralysis, anesthesia, movements, etc. I will cite the following three examples: M——l, a Russian, living in this country, suffers from psycholeptic attacks dating from an episode which occurred seven years previously and _which he has completely forgotten_. At that time he was living in Russia. It happened that after returning from a ball he was sent back late at night by his employer, a woman, to look for a ring which she had lost in the ballroom. His way led over a lonely road by a graveyard. As he was passing this place he heard footsteps behind him and became frightened. Overcome with terror he fell, partially unconscious, and his whole right side became affected with spasms and paralysis. He was picked up in this condition and taken to a hospital. Each year since that time he has had recurring attacks of spasms and paralysis.[14] In _hypnosis_ he remembers and relates a dream. This dream is one which recurs periodically but is _forgotten after waking from sleep_. This is the dream: He is back in his native land; it is the night of the ball; he sees his employer with outstretched hand commanding him to go search for the ring. Once more he makes his way along the lonely road; he hears footsteps; he becomes frightened, falls, and then awakes, with entire oblivion for the dream, to find his right side paralyzed and in spasms.