This case appears to belong to the B group of mutism cases, according to the classification of Myers, namely, to the group in which the effects are psychical rather than physical. According to Myers, whether mutism occurs as an apparent result of physicochemical or of mental causes--that is, as an A or a B case--it is _actually_ always the result of mental--that is, psycho-physiological shock. Mutism in the A cases of physical nature, where the shock must have been grosser and more profound, generally proves more severe than in the B cases. As to the appearance of unconsciousness, apparently confirmed by the patients’ statements that they “lost consciousness,” it is a question whether these cases are not really cases of deep stupor. According to Myers, the mutism is in nearly every instance closely dependent on some form of stupor, being generally the relic of such stupor after it has passed off. Let the loss of consciousness be a profound stupor due to the lifting or burial of the patient, then from this stage there will be a transition to a state of ordinary stupor in which intelligence is active but the patient is unresponsive to stimuli. The patient is in a condition called by Myers _excommunication_, in which the inhibitory process may be regarded as protecting the individual against further shock. As the stupor now passes away, it is natural that the inhibition should appear lost in the case of hearing and speech, which are two main channels of intercourse with others. Dumbness is, by far, the commonest disorder of speech, occurring in about ten per cent of shock cases in the first thousand cases of shell-shock seen by Lt. Col. Myers. Stuttering and jerky speech have occurred in about three per cent. Loss of voice is rarer. As against the view of Babinski, that mutism, being curable by suggestion, must have been produced by suggestion, Lt. Col. Myers argues that the stupor preceding mutism is the antithesis of suggestibility and is, in fact, a condition of extreme _autofixity_. Naval gun-fire effects on seaman: Aphonia. Two recurrences. =Case 264.= (BLÄSSIG, June, 1915.) A seaman from the _Derfflinger_ was brought into a naval hospital with loss of voice, December 22, 1914, able to speak only in a whisper. As a child he had had diphtheria, but recovered without complication. He had always had a very well-controlled voice. Early in December he had had a cold owing to sentry deck duty in bad weather. Two days after the shelling of Scarboro,--December 16,--while in the munition chamber of the big guns, he suddenly lost his voice. He had been greatly upset during the firing of the guns. In two weeks he recovered speech.