A commissural brain! The pattern of 5-HT immunoreactivity in Acoela (Plathelminthes) Olga I. RaikovaM. ReuterMargaretha K. S. Gustafsson ORIGINAL ARTICLE Pages: 69 - 77
The cephalic aorta of Sepia officinalis (Cephalopoda, Dibranchiata): structural muscular specialisations of a high-pressure vessel R. SchippBernhard VersenGerd Magdowski ORIGINAL ARTICLE Pages: 79 - 85
Organization and mechanical behaviour of myocyte–ligament composites in a sea-urchin lantern: the compass depressors of Stylocidaris affinis (Echinodermata, Echinoida) I. C. WilkieM. Daniela Candia CarnevaliFrancesco Bonasoro ORIGINAL ARTICLE Pages: 87 - 101
Larval head morphology of Hydroscapha natans (Coleoptera, Myxophaga) with reference to miniaturization and the systematic position of Hydroscaphidae R. G. BeutelA. Haas ORIGINAL ARTICLE Pages: 103 - 116
Ultrastructure and formation of hooded hooks in Capitella capitata (Annelida, Capitellida) Margit SchweigkoflerT. BartolomaeusLuitfried von Salvini-Plawen ORIGINAL ARTICLE Pages: 117 - 128
A safety band prevents falling of the suspended pupa of the butterfly Inachis io (Nymphalidae) during moult. A comparison with the girdled pupa of Pieris brassicae (Pieridae, Lepidoptera) Gerhard Starnecker ORIGINAL ARTICLE Pages: 129 - 136