In memoriam of Professor Vasilij (Basil) Nikitich Nikitin Simeon A. Mileikovsky Announcement Pages: 87 - 88
Studies on factors affecting survival of nile fish in the Sudan. I. The effect of hydrogen ion concentration M. A. Mahdi OriginalPaper Pages: 89 - 92
Studies on factors affecting survival of Nile fish in the Sudan. II. The effect of temperature M. A. Mahdi OriginalPaper Pages: 93 - 95
Studies on factors affecting survival of nile fish in the Sudan. III. The effect of oxygen M. A. Mahdi OriginalPaper Pages: 96 - 98
Ecological energetics of the seaweed zone in a marine bay on the Atlantic coast of Canada. III. Energy transformations by sea urchins R. J. MillerK. H. Mann OriginalPaper Pages: 99 - 114
Observations on the life history of the blue-ringed octopus Hapalochlaena maculosa D. J. TranterO. Augustine OriginalPaper Pages: 115 - 128
Larval development of Pilumnoides perlatus (Brachyura: Xanthidae) under laboratory conditions E. FagettiI. Campodonico OriginalPaper Pages: 129 - 139
Competitive role of calcium in sodium transport in the crab carcinus mediterraneus Acclimated to low salinities Č. Lucu OriginalPaper Pages: 140 - 145
Der kammerbauvorgang der großforaminifere Heterostegina depressa (Nummulitidae) M. SpindlerR. Röttger OriginalPaper Pages: 146 - 159