1. Club-shaped gland and endostyle in larval Branchiostoma lanceolatum (Cephalochordata)

   • R. Olsson

   OriginalPaper Pages: 1 - 13

2. Bau und Funktion des Süßwasserschwamms Ephydatia fluviatilis (Porifera)

   • N. Weissenfels

   OriginalPaper Pages: 15 - 23

3. The spine tissues in the echinoid Eucidaris tribuloides

   • K. Märkel
   • Ursula Röser

   OriginalPaper Pages: 25 - 41

4. Calcite-resorption in the spine of the echinoid Eucidaris tribuloides

   • K. Märkel
   • Ursula Röser

   OriginalPaper Pages: 43 - 58

5. The euphausiid compound eye — a morphological re-investigation (Crustacea: Euphausiacea)

   • E. Hallberg
   • D.-E. Nilsson

   OriginalPaper Pages: 59 - 66