Suppression from psychical influences is not at all uncommon. Fright, grief, bad news, sudden or prolonged anxiety, frequently cause this disturbance of function. The mental impression need not be very profound. Amenorrhoea is a common event with girls who go away from home to boarding-school. In these cases it is not probable that there is any pathological condition of the sexual organs; a change in their innervation is a phrase which will best serve to explain the origin of the derangement or to express our ignorance. The diagnosis of this form may be a matter of deep interest when it occurs directly after marriage, as it not infrequently does, and gives ground for the belief that pregnancy has occurred. Still more important is it when the suppression follows illicit intercourse, the fear of pregnancy then exerting a powerful emotional influence. Some cases are on record, and the writer has met with two: in both the function resumed its course after a time without remedies. Exposure to storm, getting the feet wet, and the sudden application of cold to the genitals frequently cause suppression. All the conditions, however, are not well understood. The bathing- and fishing-women of Europe are said to ply their vocation without reference to menstruation, and to suffer no inconvenience. In these cases the increased flow of blood to the pelvic organs oversteps the narrow line which separates physiological from pathological congestion, and may even pass on to inflammation. The SYMPTOMS are well marked--at first, local, as severe backache, increased heat and pressure in the pelvic region, discomfort passing on to pain, even uterine colic. If the impression be severe enough to affect the general system, there will be febrile action more or less intense, and various nervous symptoms, spasmodic or convulsive. The therapeutics of amenorrhoea must be directed in accordance with the conditions which cause it. But the strictly scientific method cannot be followed at the outset. This method presupposes a direct examination of the organs as the first step. For obvious reasons this must be deferred until special symptoms show its necessity. For treatment the cases may be classified, in some instances according to the schedule, but more frequently according to the cause or leading features, and very generally without reference to whether there is absence merely or suppression of the function. In amenorrhoea from atresia the measures of relief will be purely {188} surgical; the treatment, therefore, does not fall within the scope of this article.