A study and explanation of characteristics of surface disturbances in magnetohydrodynamics are presented. Unusual "transient" disturbances are described. The latter exist during continuous transitions from one type cf disturbance to another. Primary consideration, however, is given to the problem of stability of tangential disturbances. It affords a possible explanation of stable and sharply defined streams in the form of jets, bands, etc., which are observed in the atmosphere of the sun and which are difficult to explain in terms of ordinary hydrodynamics.