A soldier wounded May 18, 1916, was given antitetanic serum May 26th. The wounds healed, but on June 16, that is, 29 days after the trauma, contractures began, at first localized. There had been numerous wounds of legs and scrotum by shell fragments and the contractures were limited to the right leg and scrotum. There was no trismus or any lumbar symptom. During the next few days the contractures became general, the temperature rose, a shell fragment was found by X-ray at the root of the thigh and was surgically extracted. B. tetani was found upon inoculation of media with material from the shell fragment. Persulphide of soda and antitetanic serum 90 cc. in three days were given intravenously. The temperature fell and the general health was greatly improved. July 6, hallucinations and terrors, worse at night, set in. The man believed himself surrounded by flames, that daggers were being plunged into his old wounds, that his hair was being pulled. These symptoms lasted a fortnight only, whereupon the patient recovered. This case and six others accompanied by cerebral disturbances all recovered, and all the patients retained a perfect memory of their delirium and of their hallucinations. The chronological distribution of these cases was odd. One case was found early in the war; then no other cases of cerebral disorder presented themselves until the group observed at the end of 1916. Besides flames and daggers, zoöpsia was several times observed. One of the cases showed these symptoms without having been given antitetanic serum. _Re_ tetanus in the war, see in the _Collection Horizon_ a book by Courtois-Suffit and Giroux on _Les formes anormales du tétanos_. Tetanus fruste versus hysteria. =Case 120.= (CLAUDE AND LHERMITTE, 1915.) Claude and Lhermitte describe a condition of _tetanos fruste_. The neck was absolutely rigid. The patient had not been wounded in any way and, being regarded as a pure neuropath, was sent to the Centre Neurologique at Bourges. The differential diagnosis lay between true tetanus and the hysterical pseudotetanus or pseudomeningitis. In pseudotetanus there is a contracture of the superficial and deep neck muscles, especially the trapezii, sternomastoid, and deep muscles. The condition somewhat suggests that of acute meningitis or tetanus, and especially suggests tetanus because it is often associated with masseter contracture (hysterical trismus). The head is immobile, stiff, and inclined backward; eyes directed above, throat slightly prominent. Upon attempts to move the head, intense pain occurs. The pain and contracture sometimes even suggest a suboccipital Pott’s disease. This form of hysterical pseudotetanus is of sudden onset, as a rule following burial in a trench or else contusion, or a slight wound in the cervical region. Pressure on the spinous processes produces no pain, nor does a blow upon the head; and an X-ray examination will definitely eliminate the hypothesis of Pott’s disease.