The first half of this book is primarily a systematic survey of the snails, beginning with glossaries, keys for identification to genera and a checklist of species. This is followed by a synopsis of species, with brief notes on ecology, distribution and parasites. Relationships are then described between snails and schistosomes and with other paras

Systematic synopsis - introduction, glossary, identification keys; systematic synopsis - prosbranchs and pulmonates; snails and schistosomes; other snail-transmitted parasitic infections; the biology of bulinus; snail control; local snail faunas; chemical and physical factors; life cycles and populations; regions, lakes and rivers - biography.