A series of hypnagogic hallucinations were understood by analysis of the dreams which followed. The specific hallucinations in four different patients consisted of a ball and point, a fleur-de-lis, a pentagon, and a feeling of crumpled dryness in the mouth. In each case the dream yielded memories of thumb, finger, and first sucking, and in the last instance also sucking the blanket cover. These memories reached back to the second and third years and were concrete, hypnagogic representations of the sucking activity.