Synopsis The present publication has been prepared for undergraduate and postgraduate students of several Indian Universities. Every possible effort has been taken into consideration to give the classification, morphological, anatomical and reproductive details of every class of Phytum Chordata. Special emphasis has been on the diagrams as to make them clear regarding the characteristics. Since the present publication is a practical book, all the laboratory techniques, preparation of slides, mountings, dissections etc., are explained in such a way that it is easily accessible to the students. The contents confirm to the speicified syllabi of several Indian Universities and the method of presentation is very clear and lucid, which can be easily followed by the students. It is hoped that the present publication will be of great value to all the students.