The present study is based on the material collected from South and North of Tianshan Mountains of Xinjiang Uygur Autonomous Region during July-August, 1986. For 6 new species, belonging to Orbopercularia of operculariidae and Thuricola of Vaginicolidae, notes concerning their main characteristics are given. the above mentioned species are O. xinjiangensis sp. nov. O cylindrica sp. nov., O. ovalis sp. nov., O. assimilis sp. nov.,O. fusiformis sp. nov, T. inflata sp. nov.