The source regions of traveling convection vortices (TCV) observed in the dayside magnetosphere outside the near noon sector have been mapped to magnetospheric locations within the outer radiation belt, but not to the Central Plasma Sheet (CPS) as claimed by Yahnin and Moretta [1996> and Yahnin et al. [1997>. Their suggested connection between TCV and the CPS is based on the unjustified application of terminology traditionally used for the auroral precipitation structure in the nightside magnetospheric sector [Winningham et al. 1975> to the late morning-noon sector. This is a case where an important finding on the location of TCV with respect to natural magnetospheric boundaries has been presented using misleading terminology, which leads to an incorrect physical interpretation of the result. Hence this Comment emphasizes the need for a critical reexamination and modification of the traditional terminology concerning the plasma domain structure in the magnetosphere. ¿ 1998 American Geophysical Union