Ultrastructure of the proboscis in Cystiplanidae, (Plathelminthes, Kalyptorhynchia) Alain J-P. De Vocht OriginalPaper Pages: 1 - 10
A new type of central cell in the choanocyte chambers of Pellina fistulosa (Porifera, Demospongiae) Paul-Friedrich LangenbruchW. Clifford Jones OriginalPaper Pages: 11 - 14
Ultrastructure and development of the nephridia in Anaitides mucosa (Annelida, Polychaeta) Thomas Bartolomaeus OriginalPaper Pages: 15 - 32
Eggshell origin and structure in two species of Conchostraca (Crustacea, Phyllopoda) Stefano TommasiniFranca Scanabissi Sabelli OriginalPaper Pages: 33 - 37
Tubercle loss in Spatangoids (Echinodermata, Echinoides): Original skeletal structures and underlying processes Bruno DavidDidier Néraudeau OriginalPaper Pages: 39 - 53
Ultrastructure of the anal organ of Musca domestica larvae (Insecta, Diptera) in relation to ion transport Petra Andrea Schwantes OriginalPaper Pages: 55 - 69