1. Hans Driesch the critical mechanist: “Analytische Theorie der organischen entwicklung”

   • Klaus Sander

   Essay Pages: 331 - 331

2. Spatial and temporal localization of FGF receptors in Xenopus laevis

   • Xiao-yan Ding
   • Wallace L. McKeehan
   • Horst Grunz

   Original Articles Pages: 334 - 339

3. An expression vector inhibits gene expression in Xenopus embryos by antisense RNA

   • Michael Schmid
   • Herbert Steinbeisser
   • Hans J. Lipps

   Original Articles Pages: 340 - 345

4. Manipulation of cytokinesis affects polar ionic current around the egg of Lymnaea stagnalis

   • Robbert Créton
   • Danica Zivkovic
   • M. René Dohmen

   Original Articles Pages: 346 - 353

5. A study of PstB cells during Dictyostelium migration and culmination reveals a unidirectional cell type conversion process

   • John Sternfeld

   Original Articles Pages: 354 - 363

6. Whole-embryo culture of Drosophila : development of embryonic tissues in vitro

   • Kendal Broadie
   • Helen Skaer
   • Michael Bate

   Original Articles Pages: 364 - 375

7. Outgrowth dependency of forelimb regeneration on nerves in adult African clawed frog, Xenopus laevis

   • Shingo Kurabuchi

   Original Articles Pages: 376 - 382

8. The insertion of mesenchyme cells into the ectoderm during differentiation in Sea urchin embryos

   • Evelyn Spiegel
   • Melvin Spiegel

   Short Communications Pages: 383 - 388

9. Demonstration of sucrase immunoreactivity of the brush border induced by duodenal mesenchyme in chick stomach endoderm

   • Atsuko Ishizuya-Oka
   • Takeo Mizuno

   Short Communications Pages: 389 - 392

10. Acknowledgement to refers

    Acknowledgments Pages: 393 - 393