1. Shaking a concept: Hans Driesch and the varied fates of sea urchin blastomeres

   • Klaus Sander

   Essay Pages: 265 - 265

2. Observations on the polarity of mutant Drosophila follicles lacking the oocyte

   • Johannes Bohrmann
   • Anne Frey
   • Herwig O. Gutzeit

   Original Articles Pages: 268 - 274

3. A study on cell lineage, especially the germ cell line, in embryos of the teleost fish,Barbus conchonius

   • Petra Gevers
   • John Dulos
   • Lucy P. M. Timmermans

   Original Articles Pages: 275 - 283

4. The spatial expression ofDrosophila rotund gene reveals that the imaginal discs are organized in domains along the proximal-distal axis

   • Magali Agnel
   • Laurence Röder
   • Christine Vola

   Original Articles Pages: 284 - 295

5. A quantitative method for separation of livingHydra cells

   • Martin J. Greber
   • Charles N. David
   • Thomas W. Holstein

   Original Articles Pages: 296 - 300

6. Embryonic development of muscle patterns in the body wall of the grasshopper

   • Fukang Xie
   • Thomas Meier
   • Heinrich Reichert

   Original Articles Pages: 301 - 311

7. Precocious synthesis of a thyroid hormone receptor inXenopus embryos causes hormone-dependent developmental abnormalities

   • Robert Old
   • Elizabeth Ashby Jones
   • Darrin Paul Smith

   Original Articles Pages: 312 - 321

8. Connective tissue is involved in adult epithelial development of the small intestine during anuran metamorphosis in vitro

   • Atsuko Ishizuya-Oka
   • Atsumi Shimozawa

   Original Articles Pages: 322 - 329