Developmental biology is one of the major disciplines of biological sciences for the study of which one needs to have afundamental understanding of the basic concepts. Accordingly, this endeavour has been made to present the basicideas and facts of animal development, especially of the chordate animals. The subject matter has been written concisely andcompactly in clear and understandable language, illustrated with appropriate simplified figures. This book wouldprove to be a good reference text for the developmental aspects of animals, thus fulfilling the needs of biology students.