Synopsis The present book "An Introduction to Mammals" in which complete description of different types of Mammals has been given. The types have been drawn from all the classes of Mammals. In order to make the book subjective and informative, the complete and update help of outstanding works of various authors have been taken and we are highly greatful to them. We have tried to prepare the book will all important animals, describing their detailed classification, morphology, anatomy, physiology and embryology. Acute awareness is taken to provide explanatory illustrations to make it possibly useful for the graduate and postgraduate students of all Indian Universities. Authors hope that the book will be proved to be a boon for the readers, students as well as teachers.