1. A new species of marine labyrinthulid Labyrinthuloides yorkensis gen. nov. spec. nov. —Cytology and fine structure

   • Frank O. Perkins

   OriginalPaper Pages: 1 - 17

2. Differentiation between Gallionella and Metallogenium

   • Fraser Walsh
   • Ralph Mitchell

   OriginalPaper Pages: 19 - 25

3. Effect of nitrate, ammonia and nitrogen starvation on the regulation of nitrate reductase in Cyanidium caldarium

   • Carmelo Rigano
   • Umberto Violante

   OriginalPaper Pages: 27 - 33

4. Septal structure in normal and modified strains of Schizophyllum commune carrying mutations affecting septal dissolution

   • R. Marchant
   • J. G. H. Wessels

   OriginalPaper Pages: 35 - 45

5. Phototaktische Untersuchungen an einzelnen Zellen von Navicula peregrina (Ehrenberg) Kützing

   • Wilhelm Nultsch
   • Klaus Wenderoth

   OriginalPaper Pages: 47 - 58

6. Organic acid metabolism in Sclerotinia sclerotiorum

   • Dennis L. Corsini
   • Duane Le Tourneau

   OriginalPaper Pages: 59 - 64

7. Zur Frage der Beeinflussung der Glucosevergärung durch l-Malat bei Leuconostoc mesenteroides

   • O. Kandler
   • J. Winter
   • K. O. Stetter

   OriginalPaper Pages: 65 - 75

8. Controlled production of spheroplasts in the yeast Nadsonia elongata

   • Marie Havelková

   OriginalPaper Pages: 77 - 88