The eigenvalue problem for the determination of propagating modes in a lossless and homogeneous chirowaveguide of arbitrary cross section is again considered in this paper. A corrected analysis of the characteristic equations and the behaviors of the wave modes is made, based on the work by Eftimiu and Pearson <1989> who incorrectly formulated the problem. As an example of the application of the generalized analysis to some specific cases, a circular cylindrical chirowaveguide is then considered in the theoretical and numerical investigations. Through the solution of the characteristic equation, a dependency of cutoff wavenumbers of the various eigenmodes upon the chirality values is found. ¿ 2001 American Geophysical Union