1. Genetic variability and divergence between populations and species of Nesticus cave spiders

   • D. Cesaroni
   • G. Allegrucci
   • V. Sbordoni

   OriginalPaper Pages: 81 - 92

2. Autosomal and sex-chromosomal polymorphism in a wild population of the Norway rat, Rattus norvegicus

   • R. Diaz de la Guardia
   • J. P. M. Camacho
   • R. G. Ladron de Guevara

   OriginalPaper Pages: 93 - 97

3. Spontaneous meiotic non-disjunction in mammals. A study evaluating the various experimental approaches

   • J. H. Nijhoff
   • P. de Boer

   OriginalPaper Pages: 99 - 122

4. New developments in vertebrate cytotaxonomy IV. Cytogenetic studies in reptiles

   • D. Peccinini-Seale

   OriginalPaper Pages: 123 - 148

5. New developments in vertebrate cytotaxonomy V. Cytotaxonomy of lampreys

   • I. C. Potter
   • E. S. Robinson

   OriginalPaper Pages: 149 - 151

6. Multiple function of pteridines in Drosophila I. Specific fluorescent patterns in three sibling species

   • G. E. W. Thörig
   • P. W. H. Heinstra
   • W. Scharloo

   OriginalPaper Pages: 153 - 160