1. The formation of the mesoderm in urodelean amphibians

   • P. D. Nieuwkoop
   • G. A. Ubbels

   OriginalPaper Pages: 185 - 199

2. The embryonic organization of the imaginal wing disc ofDrosophila melanogaster

   • P. Ripoll

   OriginalPaper Pages: 200 - 215

3. Puffs and salivary gland function: The fine structure of the larval and prepupal salivary glands ofDrosophila melanogaster

   • Nancy J. Lane
   • Yvonne R. Carter
   • Michael Ashburner

   OriginalPaper Pages: 216 - 238

4. Zur Gametogenese und Befruchtungsbiologie vonHydra

   • Jürg Zihler

   OriginalPaper Pages: 239 - 267

5. Suppression of kidney formation by neural crest cells

   • Albert L. Etheridge

   Short Communications Pages: 268 - 270