A Textbook of Embryology

The original plan of this volume, as stated by its authors, has not been changed since the first edition was published in 1926. In addition to the correction of errors present in the second edition, additions have been made under the topics of hematopoiesis, lymphatics, lung, sex determination, and anomalies. These additions, however, are not at all extensive. Comparison of the third with the first edition reveals the fact that surprisingly little new material has been added in the last eleven years. This is the most serious criticism that can be directed against the latest edition of this book, considering the advances that have been made in this field during the time. Space for important new advances in embryology could perhaps have been made by the elimination of material of questionable value to the medical student or material more adequately dealt with in textbooks of other fields; for example,