The taxonomic and ecological status of the environmentally restricted Spongillid species of North America. V. Ephydatia subtilis (Weltner) and Stratospongilla penneyi sp. nov. Frederick W. Harrison OriginalPaper Pages: 99 - 105
Algae and testacea from high altitudes of Himalayas-I (collected by N.C.C. Punch Chulli Expedition, W. Himalayas 1970) M. R. Suxena OriginalPaper Pages: 107 - 128
Susceptibility of different body-sized Bulinus truncatus to molluscicidal action at two different temperatures Khamis Abdel RaheemHind El-GindyMajid Jassim Al-Hassan OriginalPaper Pages: 129 - 133
Artificial seagrass—a new technique for sampling the community Willard E. BarberJ. G. GreenwoodP. Crocos OriginalPaper Pages: 135 - 140
Experimental studies on toxicity of zinc to a freshwater teleost, rasbora daniconius (Hamilton) B. S. KhangarotV. K. Rajbanshi OriginalPaper Pages: 141 - 144
La texture granulometrique des sediments et le regime alimentaire des oligochetes limnicoles J. Juget OriginalPaper Pages: 145 - 154
Critical problems with extraction of ATP for bioluminescence assay of plankton biomass William B. PerryJames T. BoswellJack A. Stanford OriginalPaper Pages: 155 - 163
Effects of experimental manipulations on the life history pattern of Lymnaea stagnalis appressa say (pulmonata: lymnaeidae) Kenneth M. Brown OriginalPaper Pages: 165 - 176
Respiratory behaviour, oxygen consumption and relative dependence on aerial respiration in the African lungfish (Protopterus annectens, owen) and an air-breathing teleost (Clarias lazera, C.). M. M. Babiker OriginalPaper Pages: 177 - 187