An extensive study of the polymerlike properties in dilute solutions of lecithin cylindrical micelles, with trace amounts of water, in isooctane is presented. In contrast to the current picture that this system behaves as a solution of wormlike polymers, we find that it is best described as a solution of rodlike micelles. This finding is based on the combined results of viscometry, electrooptic birefringence, dielectric spectroscopy, static and dynamic light scattering, and dynamic sedimentation. Also, the size of the micelles seems to be independent of the concentration, whereas a strong dependence is predicted for polymerlike micelles. There is a rather abrupt change in micellar size at low concentration, which can be attributed to a sphere-to-rod transition. At high water content further evidence is found for the percolation of the micelles into a connected network, as has been suggested by us recently.(8)