1. Bar codes on kluwer journals

   Publisher's Announcement Pages: i - i

2. 1989 Publication programme

   Publisher's Announcement Pages: ii - ii

3. Bilophococcus magnetotacticus gen. nov. sp. nov., a motile, magnetic coccus

   • Thomas T. Moench

   General Papers Pages: 483 - 496

4. Purification and characterisation of glutamine synthetase fromNocardia corallina

   • N. Illing
   • R. T. Hill
   • D. R. Woods

   General Papers Pages: 497 - 507

5. Columnaris infection among cultured Nile tilapiaOreochromis niloticus

   • N. E. Amin
   • I. S. Abdallah
   • S. A. Alyan

   General Papers Pages: 509 - 520

6. Characteristics of a nitrogen-fixing methanotroph,Methylocystis T-1

   • Kiyoshi Takeda

   General Papers Pages: 521 - 534

7. Carbohydrate patterns ofCandida, Cryptococcus andRhodotorula species

   • A. C. M. Weijman
   • L. Rodrigues De Miranda

   General Papers Pages: 535 - 543

8. Redefinition ofCandida Berkhout and the consequent emendation ofCryptococcus Kützing andRhodotorula Harrison

   • A. C. M. Weijman
   • L. Rodrigues de Miranda
   • J. P. Van Der Walt

   General Papers Pages: 545 - 553

9. Differential location of regulatory and nonregulatory trehalases inCandida utilis cells

   • J. C. Arguelles
   • M. Gacto

   General Papers Pages: 555 - 565

10. Low- and intermediate-copy-number cloning vectors based on thePseudomonas plasmid pVS1

    • Y. Itoh
    • L. Soldati
    • D. Haas

    Short Communication Pages: 567 - 573

11. Comparative use of amino acids by three auxotypes of Neisseria gonorrhoeae

    • L. Pillon
    • M. Chan
    • M. Goldner

    Erratum Pages: 575 - 575