Extensive numbers of new photoelectric data have been collected and analyzed to investigate the modal behavior of VZ Cnc. Its previously observed periods yield a period ratio of 0.80 implying pulsation in the first and second radial overtones. Of the seventeen delta Scuti stars listed by Fitch and Sziedl which have well-determined periods, it is the only star which apparently does not pulsate in the fundamental mode. This peculiarity is investigated from the standpoint of a change with time of the dominant pulsation mode and atmospheric helium settling. The former suggestion is found to be untenable. The latter is found to increase the theoretical ratio of the first overtone/fundamental periods to that observed. It is thus suggested that VZ Cnc pulsates in these lowest order modes and that its atmosphere has been largely depleted of helium. However, if VZ Cnc has a temperatur as large as 7500 K, its position in the instability strip places this star near the transition line between the first and second overtone pulsation modes, beyond the fundamental mode blue edge. In this case the fundamental mode cannot exist, and the 1H and 2H modes are properly identified.