Ein Beitrag zu der Ökologie der Diatomeen in dem englischen Protektorat Swaziland B. J. Cholnoky OriginalPaper Pages: 309 - 355
Observations on the Developmental Variability of Camptylonema lahorense Ghose Har Darshan Kumar OriginalPaper Pages: 356 - 366
The Distribution of Centroptiloides bifasciata (E.-P.) (Baëtidae: Ephem.) in Southern Africa, with Ecological Observations on the Nymphs J. D. Agnew OriginalPaper Pages: 367 - 372
Observations on the Akinete formation and Karyology of cylindrocapsa involuta Reinsch Y. S. R. K. Sarma OriginalPaper Pages: 373 - 376
Larval overwintering cocoons in endochironomus tendens fabricius Ole A. Sæther OriginalPaper Pages: 377 - 381