[Arguments and proposals for a new developmental interpretation of Fasciola hepatica L. in Lymnaea (Galba) truncatula Müller (author's transl)].

The authors study the influence of several factors: temperature, drying up of ground, bodily volume of intermediary host on development of the redial generations of Fasciola hepatica in Lymnaea truncatula. Three redial generations are seen in Lymnaea truncatula, whatever environmental factors. The number of rediae of generations 2 and 3 is correlated with bodily volume of the snail host. The temperature affects synchronism of cercarial maturation in rediae of generations 1 and 2.