Fine structure of the brain and brain nerves ofOikopleura dioica (Urochordata, Appendicularia) Ragnar OlssonKaj HolmbergYlva Lilliemarck OriginalPaper Pages: 1 - 7
The spermatogenesis ofHalichondria panicea (Porifera, Demospongiae) Dagmar BarthelAndrea Detmer OriginalPaper Pages: 9 - 15
Fine structure and axonal organization in the buccal ganglia nerves ofAplysia (Mollusca, Gastropoda) Carlo MusioCelina Bedini OriginalPaper Pages: 17 - 26
Body wall muscles in the haplotaxidsHaplotaxis gordioides andPelodrilus leruthi (Annelida, Oligochaeta) Magda de EguileorRoberto ValvassoriSusanna Giorgi OriginalPaper Pages: 27 - 36
Spherical forms ofTrichoplax adhaerens (Placozoa) Martin ThiemannAugust Ruthmann OriginalPaper Pages: 37 - 45
Ultrastructural study of the naupliar eye of the ostracodeVargula graminicola (Crustacea, Ostracoda) Andrea L. Huvard OriginalPaper Pages: 47 - 51
Fine structure of the kidney and characterization of secretory products inDentalium rectius (Mollusca, Scaphopoda) Patrick D. Reynolds OriginalPaper Pages: 53 - 62