Morphology and ultrastructure of a secretory region enclosed by the venom reservoir in social wasps (Insecta, Hymenoptera) E. SchoetersJ. Billen Original Paper Pages: 63 - 71
The ciliary photoreceptor in the teleplanic veliger larvae of Smaragdia sp. and Strombus sp. (Mollusca, Gastropoda) Michael J. F. Blumer Original Paper Pages: 73 - 81
The organization of the nervous system in Plathelminthes. The neuropeptide F-immunoreactive pattern in Catenulida, Macrostomida, Proseriata Maria ReuterAaron G. MauleChris Shaw Original Paper Pages: 83 - 97
Ultrastructure of the metanephridia of Terebratulina retusa and Crania anomala (Brachiopoda) Carsten Lüter Original Paper Pages: 99 - 107
Development of the sperm head in the caddis fly Potamophylax rotundipennis (Insecta, Trichoptera) Klaus Werner WolfChristoph Klein Original Paper Pages: 109 - 115
Ultrastructure of spermiogenesis and spermatozoa in Diurodrilus subterraneus (Polychaeta, Diurodrilidae) Reinhardt Møbjerg KristensenDanny Eibye-Jacobsen Original Paper Pages: 117 - 132