A New Species of Bacillariophyta from Taishan of Shandong Some New Species and Varieties of the Genus Tetracyclus Ralfs (Bacillariophyta) New Materials of Navicula ( Naviculaceae) from Anhui, China Some New Species and Varieties of the Genus Tetracyclus Ralfs (Bacillariophyta) Newly Recorded Species of Naviculaceae (Bacillariophyta) in China Study on Margarya melanioides‘ feeding characteristics towards four attached algae and its potential restoration in Erhai basin Newly Recorded Species of Navicula(Bacillariophyta) in China, from Xinjiang Newly Recorded Species of Naviculaceae (Bacillariophyta) from Great Xing’an Moutains,China New Taxa of Diatom (Bacillariophyta) from Xizang (Tibet) (II)