1. Wilhelm Roux on embryonic axes, sperm entry and the grey crescent Klaus Sander

   Essay Pages: 117 - 117

2. Cell cycle-related fluctuations in transcellular ionic currents and plasma membrane Ca²⁺/Mg²⁺ ATPase activity during early cleavages of Lymnaea stagnalis embryos

   • Danica Zivkovic
   • Robbert Créton
   • René Dohmen

   Original Articles Pages: 120 - 131

3. Genetic and developmental analyses of chaetae pattern formation in Drosophila tergites

   • Manuel Mari-Beffa
   • José F. de Celis
   • Antonio García-Bellido

   Original Articles Pages: 132 - 142

4. Prospective fate of early blastomeres in Hydractinia echinata (Cnidaria, Hydrozoa)

   • Axel Schlawny
   • Hans-Dieter Pfannenstiel

   Original Articles Pages: 143 - 148

5. Co-localization of ecdysteroid receptors and c-fos-like protein in the brain of Manduca sexta larvae

   • Hans-Jürgen Bidmon
   • Noelle Audrey Granger
   • Walter Erich Stumpf

   Original Articles Pages: 149 - 155

6. SEM observations on polar body elimination and changes of the oocyte surface during egg maturation in the newt Triturus alpestris (Amphibia, Urodela)

   • Danuta Semik
   • Wincenty Kilarski

   Original Articles Pages: 156 - 161

7. The determination of myogenic and cartilage cells in the early chick embryo and the modifying effect of retinoic acid

   • YiPing Chen
   • Michael Solursh

   Original Articles Pages: 162 - 171

8. The gene fl(2)d is required for various Sxl-controlled processes in Drosophila females

   • Begoña Granadino
   • Ana B. San Juán
   • Lucas Sánchez

   Short communication Pages: 172 - 176