1. Editor's note

   • M. Jeuken

   EditorialNotes Pages: 203 - 203

2. Why is ‘incommensurability’ a problem?

   • Nancy J. Nersessian

   OriginalPaper Pages: 205 - 218

3. An evolutionary-ecological model of the evolution of migratory behavior in the Monarch Butterfly, and its absence in the Queen Butterfly

   • Allen M. Young

   OriginalPaper Pages: 219 - 237

4. L'adaptation evolutive

   • J. T. Wiebes

   OriginalPaper Pages: 239 - 243

5. Modeling, simulation, and embryology

   • F. H. D. van Batenburg

   Reviews Pages: 245 - 248

6. Are micro-computers growing up?

   • F. H. D. van Batenburg

   Reviews Pages: 249 - 252

7. New acquisitions of our library

   Legacy Pages: 253 - 253