1. The origin of mucous cells inHydra viridis

   • Paul G. Rose
   • Allison L. Burnett

   OriginalPaper Pages: 177 - 191

2. The origin of secretory cells inCordylophora caspia during regeneration

   • Paul G. Rose
   • Allison L. Burnett

   OriginalPaper Pages: 192 - 216

3. Veränderung der Differenzierungsleistung und der Transdeterminationsfrequenz durch Colchicin in Beinimaginalscheiben vonDrosophila melanogaster

   • Heinz Tobler

   OriginalPaper Pages: 217 - 225

4. The inducing capacities of the primary hypoblast as revealed by transfilter induction studies

   • Hefzibah Eyal-Giladi
   • Moshe Wolk

   OriginalPaper Pages: 226 - 241

5. The developmental potencies of the regeneration blastema of the axolotl limb

   • N. J. de Both

   OriginalPaper Pages: 242 - 276