The Borderland of Embryology and Pathology.

The second edition of this well established and much appreciated book has brought up to date some of the chapters in which major advances have been made during the last four years. The sections dealing with malformations of the genital organs, mongolism, and the inborn errors of metabolism have been rewritten, and several hundred new references have been added to acquaint the reader with new publications in these fields. However, the main value of this book remains, as in the first edition, the author's presentations of embryological and pathological facts and their relations to each other. During the nineteenth century pathologists showed a great interest in congenital malformations and they made the chief contributions to teratology at that time. In our century their interest in developmental errors and congenital malformations waned, and the close connections between teratology and pathology were interrupted. Willis' book bridges the gap between the classics on