Ultrastructure of the spines in the copulatory organ of some Monocelididae (Turbellaria, Proseriata) Els E. Martens OriginalPaper Pages: 261 - 265
Larvenentwicklung und Metamorphose von Pycnogonum litorale (Chelicerata, Pantopoda) Walter Behrens OriginalPaper Pages: 266 - 279
Functional anatomy of the internal gills of the tadpole of Litoria ewingii (Anura, Hylidae) Rosemary McIndoeDavid G. Smith OriginalPaper Pages: 280 - 291
Bau und Funktion des Süßwasserschwamms Ephydatia fluviatilis (Porifera) Norbert Weissenfels OriginalPaper Pages: 292 - 297
A transmission electron microscopic investigation of the sensory vesicle in the brain of Oikopleura dioica (Appendicularia) Kaj Holmberg OriginalPaper Pages: 298 - 303
Ultrastructure of gill epithelial cells of Diopatra neapolitana (Annelida, Polychaeta) A. MenendezJ. L. AriasM. Alvarez-Uria OriginalPaper Pages: 304 - 309
Morphological and mechanical aspects of fission in Ophiocomella ophiactoides (Echinodermata, Ophiuroida) I. C. WilkieR. H. EmsonP. V. Mladenov OriginalPaper Pages: 310 - 322
Blood vessels and the occurrence of arteriovenous anastomoses in cephalic heat loss areas of mallards, Anas platyrhynchos (Aves) Uffe Midtgård OriginalPaper Pages: 323 - 335