Introvert, mouth cone, and nervous system of Echinoderes capitatus (Kinorhyncha, Cyclorhagida) and implications for the phylogenetic relationships of Kinorhyncha Monika Nebelsick OriginalPaper Pages: 211 - 232
Ingestion, digestion, and egestion in Spongilla lacustris (Porifera, Spongillidae) after pulse feeding with Chlamydomonas reinhardtii (Volvocales) Georg Imsiecke OriginalPaper Pages: 233 - 244
Ultrastructure of the protonephridia of Seison annulatus (Rotifera) Wilko Ahlrichs OriginalPaper Pages: 245 - 251
Two ultrastructurally distinct types of transporting tissues, the branchiostegal and the gill epithelia, in an estuarine tanaid, Sinelobus stanfordi (Crustacea, Peracarida) Susumu KikuchiMasatoshi Matsumasa OriginalPaper Pages: 253 - 260