"Concise Invertebrate Zoology" a useful textbook for students appearing in competitive examination like NIT, PMT, SET, NET etc. and preparing for their bachelor degrees. Explains brief but important points on invertebrates, classification, types of species & their characteristics with examples & illustrative drawings. Invertebrate itself is not a taxon, but comprises many phylum like protozoa arthropod, echinodermata, etc. The most widely curriculum and Invertebrates studies include the Protozoa, Porifera, Coelenterata, Platyhelminthes, Nematoda, Annelida, Echinodermata, Mollusca and Arthropoda. These phylum includes varied body plans, life history, and mode of succession. This book cover all these aspect in very precise and abstracted form, also touching economic importance of these phylum. The text is accompanied by an abundance of detailed drawings. Each chapter deals with a different taxonomic group usually phylum or class. It consist brief description of a selected examples of the groups, followed by more detail discussion of selected topics.