1. Analysis of an SD second chromosome from a natural population of Drosophila melanogaster

   • R. Cicchetti
   • A. Loverre

   OriginalPaper Pages: 159 - 167

2. Karyometrical analysis of 10 species of the subfamily Monocelidinae (Proseriata, Platyhelminthes) with remarks on the karyological evolution of the Monocelididae

   • M. C. Curini-Galletti
   • I. Puccinelli
   • P. M. Martens

   OriginalPaper Pages: 169 - 178

3. Karyotype and meiosis studies in three South African Pyrgomorpha species (Orthoptera: Pyrgomorphidae)

   • A. Fossey
   • H. Liebenberg
   • D. H. Jacobs

   OriginalPaper Pages: 179 - 183

4. Non-reciprocal gonadal dysgenesis in hybrids of the chironomid midge Chironomus thummi II. Gonadal-dysgenesis inducing chromosomes

   • K. Hägele
   • B. Oschmann

   OriginalPaper Pages: 185 - 193

5. Colchicine action at meiotic prophase revealed by SC-spreading

   • J. Loidl

   OriginalPaper Pages: 195 - 203

6. Differential viability of allelic isozymes in the marine gastropod Cerithium scabridum exposed to the environmental stress of nonionic detergent and crude oil-surfactant mixtures

   • E. Nevo
   • B. Lavie

   OriginalPaper Pages: 205 - 213

7. Harlequin colour in the Great Dane dog

   • N. O'Sullivan
   • R. Robinson

   OriginalPaper Pages: 215 - 218

8. Mating patterns of different Adh genotypes of Drosophila melanogaster I. Differences in mating ability

   • J. A. Sánchez Prado
   • G. Blanco Lizana

   OriginalPaper Pages: 219 - 224

9. A cytogenetic description of a new species of the Anopheles culicifacies complex

   • S. G. Suguna
   • S. C. Tewari
   • R. Reuben

   OriginalPaper Pages: 225 - 230

10. Book reviews

    • Tim Guilford
    • Claudio Barigozzi
    • Peter W. H. Holland

    BookReview Pages: 231 - 235