1. Announcement

   Announcement Pages: A3 - A3

2. Drosophila larval fat body surfaces

   • R. M. Rizki
   • T. M. Rizki
   • D. B. Roberts

   OriginalPaper Pages: 1 - 7

3. Studies on the formation and state of determination of the trunk organizer in the newt,Cynops pyrrhogaster

   • Teruo Kanéda
   • Akio S. Suzuki

   OriginalPaper Pages: 8 - 12

4. Ultrastructural and experimental investigations of sperm-egg interactions in fertilization ofHydra carnea

   • Thomas G. Honegger

   OriginalPaper Pages: 13 - 20

5. Early events in retinoic acid-induced ptilopody in the chick embryo

   • Danielle Dhouailly

   OriginalPaper Pages: 21 - 27

6. The role of parental positional information in the determination of antero-posterior polarity during palleal budding in ascidians

   • Kazuo Kawamura
   • Hiroshi Watanabe

   OriginalPaper Pages: 28 - 36

7. Developmental and biochemical alterations caused by tunicamycin inBufo arenarum embryos

   • Sara S. Sánchez
   • Francisco D. Barbieri

   OriginalPaper Pages: 37 - 41

8. Ultrastructural localization of adenylate cyclase and cAMP phosphodiesterase in the gastrulating chick embryo

   • Toomas Neuman
   • Tiit Laasberg
   • Jüri Kärner

   Rapid Communications Pages: 42 - 44

9. Neural induction in amphibians

   • Manorama John
   • Jutta Janeczek
   • Hildegard Tiedemann

   Rapid Communications Pages: 45 - 47

10. Development of imaginal discs from lethal hybrids betweenDrosophila melanogaster andDrosophila mauritiana

    • Lucas Sánchez
    • Andreas Dübendorfer

    Rapid Communications Pages: 48 - 50

11. Acknowledgment to referees

    Acknowledgments Pages: 51 - 51