V. 1: The role of chromosome change in the evolution. Fish cytogenetics. Chromosome differentiation and species evolution. Algal karyology and evolutionary trends. Chromosomes in the evolution of the bryophta. V. 2: Conservation of linkage relatioships between genes as the underlying theme of karyological evolution in mammals. Patterns and modes of chromosomal evolution in reptiles. Chromosomes in evolution of coleoptera. Chromosomes in evolution of nematodes. Chromosomes and evolution in Pteridophytes. Mechanisms of chromosome change in the evolution of the tribe tradescantieae (Commelinaceae). Chromosomes evolution in the monocotyledons - an overview. Chromosomes in evolution in heteroptera. Trends of chromosome evolution in the plant kingdom. Chromosome evolution in primates with special reference to hominoidea.