The aquiferous system of two Oceanapia species (Porifera, Demospongiae) studied by corrosion casts Giorgio BavestrelloBarbara CalcinaiMaurizio Pansini Original Article Pages: 195 - 202
In vivo study of microsclere formation in sponges of the genus Mycale (Demospongiae, Poecilosclerida) Márcio R. CustódioEduardo HajduGuilherme Muricy Original Article Pages: 203 - 211
Ultrastructural investigations on the cephalic and metameric nuchal organs of Spio cf. filicornis (Polychaeta, Spionidae) Jacob Jelsing Original Article Pages: 213 - 220
Metameric organisation of the nervous system in developmental stages of Urechis caupo (Echiura) and its phylogenetic implications René Hessling Original Article Pages: 221 - 234
Reproductive system and spermatozoa of Paraturbanella teissieri (Gastrotricha, Macrodasyida): implications for sperm transfer modality in Turbanellidae Maria BalsamoMarco FerragutiPaolo Tongiorgi Original Article Pages: 235 - 241
Functional anatomy of the sperm storage organs in Pulmonata: the simple spermatheca of Bradybaena fruticum (Gastropoda, Stylommatophora) Nenad C. BojatUrsula SauderMartin Haase Original Article Pages: 243 - 255