Synopsis The Recent Trends in Chordates is carefully organized and clearly written books emphasize the salient facts of anatomical, histological, embryological, physiological and evolutionary concepts of various facets of chordates. The origin and adaptive radiation of each of the main animal classes having been succinctly described.A primary aim throughout has been clarity so as to make the text selective and meaningful. It will make itself immediate useful to students. It provides a nucleus around which the teacher can plan a successful course without too much learning on complementary and supplementary readings.The book contains-chapter and are arranged class wise. Each chapter begins with General characters and classification along with some selected animals. The physiological systems of the typed animals have been described so that the reader can develop his ideas step by step and then have a lucid understanding of their interdependence on another to form an integrated whole the living organs.