Ultrastructural investigation of spermatogenesis in Spongilla lacustris and Ephydatia fluviatilis (Porifera, Spongillidae) Wolfgang Paulus OriginalPaper Pages: 123 - 130
On the spermiogenesis of Invenusta aestus (Plathelminthes, Proseriata) an ultrastructural study with implications for plathelminth phylogeny Beate Sopott-Ehlers OriginalPaper Pages: 145 - 152
Morphology of the male and female tergal glands of the woodroach Cryptocercus punctulatus (Insecta, Dictyoptera) J. P. FarineR. BrossutC. A. Nalepa OriginalPaper Pages: 153 - 163
Functional morphology of vibratile urnae in the synaptid holothuroid Leptosynapta inhaerens (Echinodermata) Didier JansMichel Jangoux OriginalPaper Pages: 165 - 171