Presents background information on Dixy Lee Ray, chairman of the Atomic Energy Commission, and on Elizabeth Scholtz, director of the Brooklyn Botanic Garden. (PS)

Describes federal legislative action of interest to biologists, considering bills concerning the protection of marine mammals, ocean dumping of wastes, and the conservation of fisheries. (AL)

Discusses the defense mechanisms and immune reaction found in invertebrates, and examines the wealth of related biological problems that need study and many of the leads that have recently been developed. (JR)

Discusses the effects of radioactive wastes on marine communities, with particular reference to the fitness of populations and the need for field and laboratory studies to provide evidence of ecological change. (JR)