1. Physical and chemical characteristics of biogenous silica

   • A. Kamatani

   OriginalPaper Pages: 89 - 95

2. Electrophoretic studies of serum proteins of four Tilapia species (Pisces)

   • H. K. Badawi

   OriginalPaper Pages: 96 - 98

3. The reconstitutional performances of the Leptomedusa Campanularia jonstoni

   • V. Schmid
   • P. Tardent

   OriginalPaper Pages: 99 - 104

4. Growth characteristics of the mass-reared tintinnid Tintinnopsis beroidea

   • K. Gold

   OriginalPaper Pages: 105 - 108

5. Reproductive biology and embryonic development of Eledone cirrosa (Cephalopoda: Octopoda)

   • K. Mangold
   • S. von Boletzky
   • D. Frösch

   OriginalPaper Pages: 109 - 117

6. Early embryonic stages of Adula californiensis (Pelecypoda: Mytilidae) and the effect of temperature and salinity on developmental rate

   • R. G. Lough
   • J. J. Gonor

   OriginalPaper Pages: 118 - 125

7. Zur Morphologie, Histochemie, Tagesperiodik und Biologie der Operculardrüse bei Labriden und Scariden (Pisces)

   • M. J. Casimir

   OriginalPaper Pages: 126 - 146

8. Mathematische Analyse der kombinierten Wirkung von Temperatur und Salzgehalt auf den Stoffwechsel von Tilapia mossambica (Teleostei)

   • F. Krüger

   OriginalPaper Pages: 147 - 153

9. Remarques sur la systématique des Phoronidea X. Notes sur l'écologie, la morphologie et la taxonomie de Phoronis ijimaï et de P. vancouverensis

   • C. C. Emig

   OriginalPaper Pages: 154 - 159

10. A brief survey of the ecology and biology of the Caspian Polyphemoidea

    • Ph. D. Mordukhai-Boltovskoi
    • I. K. Rivier

    OriginalPaper Pages: 160 - 169

11. The phytal animals on the thalli of Sargassum serratifolium in the Sargassum region, with reference to their seasonal fluctuations

    • H. Mukai

    OriginalPaper Pages: 170 - 182