This book documents the biology of the small freshwater snail, Pomatiopsis lapidaria (Say). This comprehensive study delves into its potential as an intermediate host for Schistosoma japonicum, the organism responsible for schistosomiasis, a very rare disease.

Key Aspects Covered:

Distribution and Habitats: Detailed exploration of where Pomatiopsis lapidaria can be found and the environments it occupies.

Life History: Comprehensive insights into the life cycle of Pomatiopsis lapidaria, including egg description and susceptibility to infection by Schistosoma japonicum.

Anatomy: In-depth examination of the snail's anatomical features, enhancing understanding of its biological functions and classification within the Hydrobiidae family.

Significant contributions from past researchers like F.C. Baker, D.J. Ameel, and W.B. DeWitt are integrated with new findings, offering a holistic view of Pomatiopsis lapidaria in relation to its close relatives, Pomatiopsis cincinnatiensis and the Oncomelania species.

This work not only underscores the importance of Pomatiopsis lapidaria in medical parasitology but also contributes to general malacological science by documenting its distribution, ecological preferences, and anatomical details.