Preface\nIntroduction\n1. Development of Sponges from the Class Calcarea Bowerbank, 1864\n2. Development of Sponges from the Class Hexactinellida Schmidt, 1870\n3. Development of sponges from the class Demospongiae Sollas, 1885\n4. Development of Homoscleromorpha; order Homosclerophorida Dendy, 1905\n5. Typization of sponge development and its significance for phylogeny\n6. Comparative analysis of individual development in sponges\n7. Evolution and individual development of sponges: regularities and directions\n8. In place of conclusion: Bauplan and phylotypic stage in Porifera\nLiterature references\nFigures legends\nTaxonomic Index