Structure and development of the nephridia of Tomopteris helgolandica (Annelida) T. Bartolomaeus ORIGINAL ARTICLE Pages: 1 - 11
Ultrastructure of the male reproductive organs in the interstitial annelid Sphaerosyllis hermaphrodita (”Polychaeta”, Syllidae) M. KuperWilfried Westheide ORIGINAL ARTICLE Pages: 13 - 22
Ultrastructure of the nuchal organ and cerebral organ in Onchnesoma squamatum (Sipuncula, Phascolionidae) G. PurschkeF. WolfrathW. Westheide ORIGINAL ARTICLE Pages: 23 - 31
Ultrastructure of the cephalic sensory organs of adult Pycnophyes dentatus and of the first juvenile stage of P. kielensis (Kinorhyncha, Homalorhagida) B. Neuhaus ORIGINAL ARTICLE Pages: 33 - 40
Epidermal ultrastructure of Seison nebaliae and Seison annulatus, and a comparison of epidermal structures within the Gnathifera W. H. Ahlrichs ORIGINAL ARTICLE Pages: 41 - 48
Transport-active organs within the ’ano-genital’ capsule of Craterostigmus tasmanianus (Chilopoda, Craterostigmomorpha) H. BoruckiJörg Rosenberg ORIGINAL ARTICLE Pages: 49 - 52
Ultrastructure and ion permeability of the two types of epithelial cell arranged alternately in the gill of the fresh water branchiopod Caenestheriella gifuensis (Crustacea) S. KikuchiKagehide Shiraishi ORIGINAL ARTICLE Pages: 53 - 62
Permeability of the podocytes of Lumbricus terrestris (Annelida, Oligochaeta) to different markers U. Hansen ORIGINAL ARTICLE Pages: 63 - 69