Venomous Animals and their Venoms focuses on the comprehensive presentation of the entire field of the venomous members of the animal kingdom, chemistry and biochemistry of venoms, and pharmacological actions and their antigenic properties. The selection first offers information on the development of knowledge about venoms and the platypus (Ornithorhynchus anatinus) and its venomous characteristics, including biology, venom apparatus, properties of venom, and significance of venom apparatus in Ornithorhynchus. The text then elaborates on the classification, biology, and description of the venom apparatus of insectivores of the genera Solenodon, Neomys, and Blarina and the chemistry and pharmacology of insectivore venoms. The publication takes a look at karyotypes, sex chromosomes, and chromosomal evolution in snakes and coagulant, proteolytic, and hemolytic properties of some snake venoms. Topics include hemolytic property, karyotypes of South American snakes, sex chromosomes, methods for the study of chromosomes of reptiles, and chromosomal evolution. The selection is a vital source of data for readers interested in venomous animals and their venoms.