This book is written for ecologists and protozoologists. Ecologists who study environments and biotic communities in which protozoa are im­ portant should find this book especially useful. During the last decade it has become clear that protozoa play important roles in natural eco­ systems, but few ecologists have a feeling for the functional properties and the diversity of these organisms. Protozoa pose or exemplify many general problems of population and community ecology, and of evo­ lutionary biology. In most respects the general ecological properties of protozoa are not fundamentally...