Synopsis The present compendium embodies twenty five review articles covering diverse aspects of algae, contributed by eminent phycologists. The write ups encompass comprehensive information on morphology, physiology and ecology of algae. It also affords interesting reading on new emerging fields like cytotaxonomy, allelopathy, limnology and microalgal biotechnology. Written in simple and semi technical language, the volume is laden with useful information for research workers and students. It provides enough base material for initiating a person into the field of Algology.