9. The paresthesias which accompany the attack of vertigo or anxiety are interesting because they associate themselves into a firm sequence, similar to the sensations of the hysterical aura. But in contrast to the hysterical aura I find these associated sensations atypical and changeable. Another similarity to hysteria is shown by the fact that in anxiety neurosis a kind of conversion[46] into bodily sensations, as for example into rheumatic muscles, takes place which otherwise can be overlooked at one’s pleasure. A large number of so called rheumatics, who are moreover demonstrable as such, really suffer from an anxiety neurosis. Besides this aggravation of the sensation of pain I have observed in a number of cases of anxiety neurosis a tendency towards hallucinations which could not be explained as hysterical. 10. Many of the so called symptoms which accompany or substitute the attack of anxiety also appear in a chronic manner. They are then still less discernible, for the anxious feeling accompanying them appears more indistinct than in the attack of anxiety. This especially holds true for the diarrhea, vertigo, and paresthesias. Just as the attack of vertigo can be substituted by an attack of syncope, so can the chronic vertigo be substituted by the continuous feeling of feebleness, lassitude, etc. II. THE OCCURRENCE AND ETIOLOGY OF ANXIETY NEUROSIS. In some cases of anxiety neurosis no etiology can readily be ascertained. It is noteworthy that in such cases it is seldom difficult to demonstrate a marked hereditary taint. Where we have reason to assume that the neurosis is acquired we can find by careful and laborious examination that the etiologically effective moments are based on a series of injuries and influences from the sexual life. These at first appear to be of a varied nature but easily display the common character which explains their homogeneous effect on the nervous system. They are found either alone or with other banal injuries to which a reinforcing effect can be attributed. This sexual etiology of anxiety neurosis can be demonstrated so preponderately often that I venture for the purpose of this brief communication to set aside all cases of a doubtful or different etiology. For the more precise description of the etiological determinations under which anxiety neurosis occurs, it will be advisable to treat separately those occurring in men and those occurring in women. Anxiety neurosis appears in women—disregarding their predisposition—in the following cases: (_a_) As virginal fear or anxiety in adults. A number of unequivocal observations showed me that an anxiety neurosis, which is almost typically combined with hysteria, can be evoked in maturing girls, at the first encounter with the sexual problem, that is at the sudden revelation of the things hitherto veiled, by either seeing the sexual act, or by hearing or reading something of that nature;