1. Fine structure of the trichomycete, Harpella melusinae, from black-fly guts

   • R. E. Reichle
   • R. W. Lichtwardt

   OriginalPaper Pages: 103 - 125

2. The fine structure of ascospore wall formation in Sordaria fimicola

   • Henry R. Mainwaring

   OriginalPaper Pages: 126 - 135

3. Ultrastructure of Cocconeis diminuta pantocsek

   • D. L. Taylor

   OriginalPaper Pages: 136 - 145

4. Axial fibrils of anaerobic spirochetes: Ultrastructure and chemical characteristics

   • R. Joseph
   • E. Canale-Parola

   OriginalPaper Pages: 146 - 168

5. Silica availability and the formation of dysplastic cells in cultures of Ditylum brightwelli (West) Grunow

   • Brenda J. Boleyn

   OriginalPaper Pages: 169 - 177

6. Control of urease formation in certain aerobic bacteria

   • H. Kaltwasser
   • J. Krämer
   • W. R. Conger

   OriginalPaper Pages: 178 - 196