It is probably safe to assume, on the basis of as large a series as ours, that the symptoms of stupor _per se_ imply no bad prognosis. Further, it has been noted that a relatively pure type of reaction is seen, the symptoms appearing with tolerable consistency. In analyzing the histories of dementia præcox patients, therefore, one looks for inconsistencies among, or additions to, the stupor symptoms. We may say at the outset that we have been able to find no case of malignant stupor that showed what we regard as a typical benign stupor reaction, and it is questionable whether partial stupor as we have described it, ever occurs with a bad prognosis. Usually the discrepant symptoms in the dementia præcox cases are sufficiently marked to enable one to make a positive diagnosis quite soon after the case comes under observation. The law of benign stupor is a limitation of energy, emotion and ideational content. In dementia præcox we have a re-direction of attention and interest to primitive fantastic thoughts and a consequent perversion of energy and emotion. In many malignant stupors one can detect evidence of this second type of reaction in symptoms that are anomalous for stupor. For instance, one meets with frequent silly and inexplicable giggling. Then, too, smiling, tears or outbursts of rage, the occasions for which are not manifest, are much more frequent than in typical stupor. Similarly, delusional ideas (not concerned with death at all) may appear or the patient may indulge in speech that is quite scattered, not merely fragmentary. Two cases may be cited briefly to illustrate these dementia præcox symptoms superadded to those of stupor. CASE 20.--_Winifred O’M._ Age: 19. Single. Admitted to the Psychiatric Institute May 6, 1911. _F. H._ The occurrence of other nervous or mental disease in the family was denied. _P. H._ The patient seems to have been rather shy and goody-goody in disposition. According to her mother this seclusiveness did not begin to be markedly noticeable until the winter before her psychosis, when there was some trouble about getting work. She had previously been to a business school. Then she held a position as stenographer temporarily. When this job was over she had a number of positions that did not last long and was once idle for two months. In February (three months before admission) her father was out of work, which added to her worry.