Ultrastructure of the subepidermal musculature of Xenoturbella bocki, the adelphotaxon of the Bilateria U. EhlersBeate Sopott-Ehlers ORIGINAL ARTICLE Pages: 71 - 79
Comparative ultrastructure of the epidermal ciliary rootlets and associated structures in species of the Nemertodermatida and Acoela (Plathelminthes) K. Lundin ORIGINAL ARTICLE Pages: 81 - 92
Ultrastructure and histochemistry of the testicular efferent duct system and spermiogenesis in Opistognathus whitehurstii (Teleostei, Trachinoidei) Lucia ManniM. B. Rasotto ORIGINAL ARTICLE Pages: 93 - 102
Ultrastructure of the non-germinal cells in the testes of ascidians (Urochordata) and their role in the phagocytosis of sperm Christian JørgensenJørgen Lützen ORIGINAL ARTICLE Pages: 103 - 113
The larval ocelli of Golfingia misakiana (Sipuncula, Golfingiidae) and of a pelagosphera of another unidentified species M. J. F. Blumer ORIGINAL ARTICLE Pages: 115 - 120
Detection of distinct endocytotic and phagocytotic activities in epithelial cells (pinacocytes) of freshwater sponges (Porifera, Spongillidae) Beate Hahn-KeserW. Stockem ORIGINAL ARTICLE Pages: 121 - 134