[Earstructures in one case of anencephalie (author's transl)].

According to the majority of cases under observation the following anomalies could be found: extended, separated or manifold developed crura of the stapes, reduction in the circular windings of the cochlea down to 1 1/2 with a normal development of Corti's organum, reduction of the nerve structures of the nervus cochlearis to a munimum and an open facial canal.