On a new cytological race of schizomeris leibleinii Kütz Y. S. R. K. SarmaB. R. Chaudhary OriginalPaper Pages: 181 - 191
A new species of Metacnephia Crosskey (Diptera: Simuliidae) from the south of England, with notes on its habitat and biology M. LcadleJ. A. B. Bass OriginalPaper Pages: 193 - 207
Untersuchungen über die Wirkung des hydrostatischen Druckes auf das Wachstum von Delesseria sanguinea (L.) Lamour. aus der westlichen Ostsee Mustafa Shameel OriginalPaper Pages: 209 - 230
Sulphide formation and chemical composition of bottom sediments of some Italian lakes Ju. I. Sorokin OriginalPaper Pages: 231 - 240
On the carbon and sulphur metabolism in the meromictic Lake Faro (Sicily) Ju. I. SorokinN. Donato OriginalPaper Pages: 241 - 252
Succession in Zoo- and phytoplankton in a sewage stabilization pond H. S. PatilG. B. DodakundiS. S. Rodgi OriginalPaper Pages: 253 - 264
Some observations on the spawning behaviour and larval development in the limpet, Cellana Radiata (Born) (Gastropoda: Prosobranchia) M. Balaparameswara Rao OriginalPaper Pages: 265 - 272
The effect of dissolved oxygen on the burrowing behavior of Limnodrilus hoffmeisteri (Oligochaeta) J. A. FischerA. M. Beeton OriginalPaper Pages: 273 - 290
Die wirkung subletaler bleikonzentrationen auf die chemorezeptoren zweier süßwasserfischarten Gerhard Haider OriginalPaper Pages: 291 - 300
Physicochemical conditions in temporary ponds in the New Forest A. N. KhalafL. J. MacDonald OriginalPaper Pages: 301 - 318
An ecological study of three freshwater ponds of hyderabad-India III. The phytoplankton (Volvocales, Chlorococcales, and Desmids) V. S. Rao OriginalPaper Pages: 319 - 337
