Synopses of 350 films (16 mm.) on ecology, adaptation of plants and animals to their environment, and environmental pollution are listed alphabetically by title in this guide. It specifies whether the film is black-and-white or color, its running time, and its source. An abbreviated subject index and a directory of sources are also provided. The films are available primarily on a sale and/or rental basis, although a few can be obtained on free loan. Some sample titles are: Chain of Life; Animals Protect Themselves; Balance in Nature; Heredity and Adaptive Change; Population Ecology; Effects of Air Pollution; The Garbage Explosion; and Silent Spring of Rachel Carson. (JY)