Steady shear rheological measurements were carried out on aqueous solutions containing 15 mM cetyltrimethylammonium bromide (CTABr) and a constant value of [MX] and temperature for MX = 2,3-; 2,4-; 2,5-; 2,6-; 3,4-; and 3,5-Cl(2)BzNa with Bz(-)representing C6H3CO2I.... Plots of zero shear viscosity (eta (0)) vs. [MX] at 35 A degrees C and 15 mM CTABr show the presence of single maximum and double maxima for MX = 2,3- and 3,5-Cl(2)BzNa, respectively. Turbidity data (absorbance at 600 nm vs. [MX]) coupled with eta (0)vs. [MX] data at 35 A degrees C reveal indirectly the presence of vesicles along with wormlike micelles (WM) at MX / CTABr > 0. 7 for MX = 3,5-Cl(2)BzNa. Temperature dependence of eta (0)in the vicinity of the viscosity maximum shows nonlinear and linear Arrhenius behavior, within the temperature range of 20-55 A degrees C, for MX = 2,3-; 2,4-; 2,5-; 3,4-; and 3,5-Cl(2)BzNa, respectively. The values of eta (0), (critical shear rate), and flow activation energy correlate with CTABr micellar binding constants of counterions.