1. The origin of skeleton forming cells in the sea urchin embryo

   • Susan Urben
   • Corey Nislow
   • Melvin Spiegel

   OriginalPaper Pages: 447 - 456

2. Two groups of interrelated genes regulate early neurogenesis in Drosophila melanogaster

   • Michael Brand
   • José A. Campos-Ortega

   OriginalPaper Pages: 457 - 470

3. Nerve cell and nematocyte production in Hydra is deregulated by lithium ions

   • Monika Hassel
   • Stefan Berking

   OriginalPaper Pages: 471 - 475

4. Interactions between janus and bcd cortical pattern mutants in Tetrahymena thermophila

   • Eric Stephen Cole
   • Joseph Frankel
   • Leslie Meek Jenkins

   OriginalPaper Pages: 476 - 489

5. Cell-specific endopolyploidy in developing Artemia

   • John A. Freeman
   • Robert B. Chronister

   Short Communications Pages: 490 - 495

6. Role of hormones in starvation-induced delay in larval hemolymph protein gene expression in Galleria mellonella

   • Nancy Ann Memmel
   • Aparna Ray
   • Alapati Krishna Kumaran

   Short Communications Pages: 496 - 502

7. Expression of myosin heavy chain isoforms in myogenic clones obtained from developing quail breast muscle

   • Keith E. Latham
   • Irwin R. Konigsberg

   Short Communications Pages: 503 - 506

8. Expression of a reporter gene resembles that of its neighbour: an insertion in the hairy gene of Drosophila

   • Laurent Fasano
   • Nathalie Coré
   • Stephen Kerridge

   Short Communications Pages: 507 - 512

9. A traction-based mechanism for somitogenesis in the chick

   • Jonathan B. L. Bard

   Short Communications Pages: 513 - 517

10. Etxtramacrochaetae, a trans-acting gene of the achaete-scute complex of drosophila involved in cell communication

    • Luis A. García Alonso
    • Antonio García-Bellido

    Erratum Pages: 518 - 518

11. Acknowledgement to referees

    Acknowledgments Pages: 519 - 519