The metamorphosis of the parenchymula-larva of Ephydatia fluviatilis (Porifera, Spongillidae) Christine WielspützUwe Saller OriginalPaper Pages: 173 - 177
Spermiogenesis in Polyplacophora, with special reference to acrosome formation (Mollusca) John Buckland-NicksFu-Shiang ChiaRon Koss OriginalPaper Pages: 179 - 188
Ultrastructure of transrectal coelomoducts in the sea cucumber Parastichopus californicus (Echinodermata, Holothuroida) George L. ShinnStephen A. StrickerMichael J. Cavey OriginalPaper Pages: 189 - 199
Ultrastructure of the tube foot sensory-secretory complex in Ophiocomina nigra (Echinodermata, Ophiuridea) Brendan BallMichel Jangoux OriginalPaper Pages: 201 - 209
Anatomy and ultrastructure of the salivary gland in the thorax of the honeybee worker, Apis mellifera (Insecta, Hymenoptera) K. SchönitzerP. Seifert OriginalPaper Pages: 211 - 222
Tympana, auditory thresholds, and projection areas of tympanal nerves in singing and silent grasshoppers (Insecta, Acridoidea) K. RiedeG. KämperI. Höfler OriginalPaper Pages: 223 - 230