Contents

28 May 1976
Vol 192, Issue 4242

About The Cover

Hastigerina pelagica (d'Orbigny), a planktonic foraminifer with spines 7 millimeters in length and a bubble with a diameter of 2 millimeters, which serves as a flotation device and housing for numerous dinoflagellate symbionts. Several species of planktonic Foraminifera are hand-collected by scuba diving in the Sargasso Sea and cultured at the Bermuda Biological Station. Gametogenesis was recently observed for the first time in these marine protozoans. See page 890. [Allan W. H. Bé, Lamont-Doherty Geological Observatory, Palisades, New York]