1. Editorial note

   • M.R.

   EditorialNotes Pages: iii - iii

2. Gibbard's evolutionary theory of rationality and its ethical implications

   • Stephen W. Ball

   OriginalPaper Pages: 129 - 180

3. How is a species kept together?

   • Peter J. Beurton

   OriginalPaper Pages: 181 - 196

4. The threefold parallelism of Agassiz and Haeckel, and polarity determination in phylogenetic systematics

   • Harold N. Bryant

   OriginalPaper Pages: 197 - 217

5. Ostensive definitions of the names of species and clades

   • Michael T. Ghiselin

   Discussion Pages: 219 - 222

6. The definitions of species and clade names: A reply to Ghiselin

   • Kevin De Queiroz

   Discussion Pages: 223 - 228

7. COSEPUP on responsible science

   • Frederick Grinnell

   Review Article Pages: 229 - 233

8. Recent books on the history of museums

   • Ronald Rainger

   Review Article Pages: 235 - 248

9. Booknotes

   • M.R.

   Announcement Pages: 249 - 254