The filter apparatus of Rana temporaria and Bufo bufo larvae (Amphibia, Anura) Bruno Viertel OriginalPaper Pages: 345 - 355
Embryonic development and molting of the antennal coeloconic no pore- and double-walled wall pore sensilla in Locusta migratoria (Insecta, Orthopteroidea) Franz Ameismeier OriginalPaper Pages: 356 - 366
The development of Spongilla lacustris from the oocyte to the free larva (Porifera, Spongillidae) Uwe SallerNorbert Weissenfels OriginalPaper Pages: 367 - 374
Silica spicules and axial filaments of the marine sponge Stelletta grubii (Porifera, Demospongiae) Tracy L. SimpsonPaul-Friedrich LangenbruchLidia Scalera-Liaci OriginalPaper Pages: 375 - 382
Body structure of marine sponges Paul-Friedrich LangenbruchTracy L. SimpsonLidia Scalera-Liaci OriginalPaper Pages: 383 - 387
Ultrastructure of a muscle spindle-analogous receptor organ in the mandible of Oncopeltus fasciatus (Insecta, Heteroptera) with remarks on the homology of the mandibular muscles Hans BolenderKlaus Honomichl OriginalPaper Pages: 388 - 394
Morphology of the pedal circulatory system of the marine gastropod Busycon contrarium and its role in locomotion (Gastropoda, Buccinacea) Janice Voltzow OriginalPaper Pages: 395 - 400