The ontogeny of the filter apparatus of anuran larvae (Amphibia, Anura) Bruno Viertel OriginalPaper Pages: 239 - 266
Ultrastructure and organization of the epineural canal and the nerve cord in sea urchins (Echinodermata, Echinoida) Konrad MärkelUrsula Röser OriginalPaper Pages: 267 - 279
Repugnatorial glands with associated striated muscle and sensory cells inMelibe leonina (Mollusca, Nudibranchia) Louise R. Bickell-Page OriginalPaper Pages: 281 - 291
Electron microscopical observations on vitellocytes and germocytes inNematoplana coelogynoporoides (Plathelminthes, Proseriata) Beate Sopott-Ehlers OriginalPaper Pages: 293 - 300