Seitz reports twenty hypnotic experiments on two patients. He concludes that psychodynamically equivalent symptoms can be substituted under hypnosis for the presenting symptoms of patients. To be psychodynamically equivalent, symptoms must be similar in symbolic meaning and in the depth of regression they represent. These observations and hypotheses are of interest to the psychoanalyst. 'Vegetative neurotic symptoms may replace conversion reactions. When this occurs, the vegetative symptom often appears to subserve symbolic functions similar to the conversion reaction which it replaces. The symbolism of vegetative neurotic symptoms is seldom, if ever, as specific identionally as that of conversion reactions.' Some of the hypotheses are restatements of familiar psychoanalytic concepts.