Mr. Flügel, in his recent 'Note on the Phallic Significance of the Tongue', says: 'Although the psychical mechanisms connected with stammering have not yet fully been revealed, it is clear that they are closely connected with feelings of inferiority, and perhaps also with ideas of castration'. We can fully agree with Mr. Flügel as to our vagueness with regard to the exact mechanism of stammering, although the forces and material at the disposal of this particular mechanism have been given with some fulness by other writers. Coriat, Stekel, Appelt all deal with the subject at length and in detail: 'repression of certain trends of thought or emotions, usually of a sexual nature' (Coriat, 'Stammering as a Psychoneurosis', Journal of Abnormal Psychology, Vol. IX, p. 6), 'bad conscience' as a result of masturbatory acts homosexual tendencies, anal phantasies, etc.