1. The role of ciliated protozoa in pelagic freshwater ecosystems

   • John R. Beaver
   • Thomas L. Crisman

   Review Pages: 111 - 136

2. Unusual bloom of star-like prosthecate bacteria and filaments as a consequence of grazing pressure

   • Micheline Bianchi

   Note Pages: 137 - 141

3. Nitrate requirement for acetylene inhibition of nitrous oxide reduction in marine sediments

   • Jennifer M. Slater
   • Douglas G. Capone

   Note Pages: 143 - 157

4. The characterization of amidohydrolases in a freshwater lake sediment

   • Paul J. Sallis
   • Richard G. Burns

   Note Pages: 159 - 170

5. Factors involved in multiplication and survival ofEscherichia coli in lake water

   • Yigal Henis
   • Koteswara R. Gurijala
   • Martin Alexander

   Note Pages: 171 - 180

6. Phenotypical divergences between populations of soil bacteria isolated on different media

   • Roald Sørheim
   • Vigdis Lid Torsvik
   • Jostein Goksøyr

   Note Pages: 181 - 192

7. Density-dependent parasitism of the soil-borne nematodeCriconemella xenoplax by the nematophagous fungusHirsutella rhossiliensis

   • B. A. Jaffee
   • J. T. Gaspard
   • H. Ferris

   Note Pages: 193 - 200

8. Effects and fate of phenol in simulated landfill sites

   • Brian Jonathan Tibbles
   • Albin Alexander Wladyslaw Baecker

   Note Pages: 201 - 206

9. Spirochetes autochthonous to the rat gastrointestinal tract

   • H. M. Cowley
   • R. H. Hill

   Note Pages: 207 - 217