1. Immunofluorescent distribution of postribosomal particles during oogenesis and early development of an insect (Dysdercus intermedius, Heteroptera, Pyrrhoc.)

   • Doris Wiemann-Weiss
   • Hans Emmerich
   • Franz Duspiva

   OriginalPaper Pages: 53 - 61

2. On the phenotype and development of mutants of early neurogenesis inDrosophila melanogaster

   • Ruth Lehmann
   • Fernando Jiménez
   • José A. Campos-Ortega

   OriginalPaper Pages: 62 - 74

3. Spatial aspects of cell interactions involved in the determination of dorsoventral polarity in equally cleaving gastropods and regulative abilities of their embryos, as studied by micromere deletions inLymnaea andPatella

   • Willem J. A. Arnolds
   • Jo A. M. van den Biggelaar
   • Nico H. Verdonk

   OriginalPaper Pages: 75 - 85

4. Quantitative analysis of the spatial distribution of ultrastructural differentiation markers during development ofDictyostelium discoideum

   • Pauline Schaap

   OriginalPaper Pages: 86 - 94

5. Endocrine mechanisms mediating light-temperature effects on male reproductive activity inTyposyllis prolifera (polychaeta, syllidae)

   • Heinz-Dieter Franke

   OriginalPaper Pages: 95 - 102

6. Changes in cell surface proteins of culturedDrosophila cells exposed to 20-hydroxyecdysone

   • Terrell Kent Johnson
   • Leslie Ann Brown
   • Robin Ernest Denell

   Rapid Communications Pages: 103 - 107

7. Areal and laminar distribution of gangliosides in the fetal human neopallium at 28 weeks of gestation

   • I. Kraêun
   • H. Rösner
   • H. Rahmann

   Rapid Communications Pages: 108 - 112