No abstract

A fishery has developed in recent years in this country for certain hydroids collectively termed ‘white weed’. The hydroids, particularly Sertularia and, more recently, Hydrallmania, are raked up from the sea-bed, processed, dyed and used, largely in the United States of America, for decorative purposes. Fishing for white weed is not new, for it was practised in Germany between the wars. German scientists, notably von Reitzenstein (1913), Pax (1928), and Thiel (1938), examined various aspects of the fishery, and of biology of the hydroids concerned.

No abstract

Cardiac tissue cells from oysters (Crassostrea virginica), cultured in a salt-enriched medium, apparently required a higher salt concentration for initiation of cell proliferation than that used for mammalian tissue cultures. The presence of human serum and bovine amniotic fluid enhanced the cell proliferation. Evidence of amitosis was observed in the cultured cells.

No abstract