This falls into four unequal parts. The first opens with a historical review and describes parasitism by helminths, their habitat, localization, reproduction, life cycle and intermediate hosts of larval stages, portals of entry into hosts, migrations within the body of the host, paths of exit from hosts, geographic distribution, effects on the host, cellular and humoral reactions of the parasitized organism, effects on the intermediate invertebrate hosts, effects of the host on its helminth parasites, methods of examination and study of helminths, and nomenclature of helminths and helminthiases. The second, or main, part of the book contains the special helminthology, in which the different species of trematodes, cestodes, nematodes and acanthocephalid worms of man and his domestic animals are described, figured and classified according to the latest zoological information and in accordance with the International Rules of Nomenclature. Each species is given a uniform presentation including synonymy, morphology, habitat, ecology,