Fresh evidence is presented that meniscus lines are formed at the intermediate surface of a multilayered structure grown by LPE and that both departing and arriving solutions generate such lines. The shape of a large meniscus line has also been determined and compared with the theoretically predicted shape for a moving groove associated with a mobile grain boundary. The correspondence between the two shapes and the similarities between the physical situations lead to the conclusion that the two phenomena are essentially the same except that a moving solution - gas phase boundary replaces a mobile grain boundary. This suggests that the phenomenon is fundamental and possibly also relevant to other crystal growth situations. © 1977.