An objective analysis is made by the hybrid use of Nimbus 4 BUV and ground-based network data to investigate interannual variations in global distributions of total ozone. Much improvement in spatial resolution and reliability of the analysis is attained. From the deduced time changes in 7 years (April 1970 to May 1977), the quasi-biennial and 4-year oscillations (QBO and FYO) are separated by numerical filtering. Characteristic features of these oscillations are investigated by examining time change of global patterns as well as some spatial mean values. The QBO in total ozone is characterized by large variabilities in time and space. Typical features are as follows: In the tropics, positive deviations nearly coincide with the westerly phase of equatorial zonal wind at 50 mbar. Zonally uniform phase changes exhibiting cross-equatorial northward propagation are observed. Phase propagation is continuous to northern mid-latitudes, where the ozone distributions are accompanied by zonal wave number 3--4 disturbances. In northern high latitudes deviations superposed by wave number 1 distribution are found often opposite to midlatitudes. In the southern hemisphere, the phase is reversed around 15 ¿S and nearly out-of-phase relation to northern mid-latitudes is observed. Wave number 1 is the dominant wave component throughout the southern hemisphere. The FYO in total ozone is suggested as a global phenomenon. This oscillation is characterized as follows: A roughly symmetric distribition with respect to the equator is observed with the out-of-phase relation between tropics and extratropics. There also appears a phase propagation starting from southern high and mid-latitudes and reaching northern high latitudes. Zonally uniform phase change with wave number 3 disturbances are seen in the northern mid-latitudes. In the equatorial region and southern hemisphere, and southern hemisphere, systematic phase precedings in the western hemisphere are observed. For both QBO and FYO, planetary scale total ozone waves of zonal wave number 1 in the winter hemisphere are seen to penetrate into the summer hemisphere.