New Orleans has a distinguished history as a center for medical and biological learning, a history shared by Tulane University, its School of Medicine, and its Bio­ logical and Medical Sciences departments. This background made it especially fitting that the University, in conjunction with the Cancer Association of Greater New Orleans, Inc. and the National Cancer Institute, should sponsor the "Symposium: Biology of Amphibian Tumors" held October 28, 29, 30, 1968. The University wishes to express its appreciation to the Cancer Association for its assistance in making the Symposium possible and to acknowledge the support made available through the Bio­ medical Sciences Support Grant program of the National Institutes of Health. As the title of this volume indicates, the Symposium yielded valuable results in the area of cancer research and it stands to stimulate further efforts in this most important field. Some notion of the impact of this symposium is suggested by the broad range of the 200 participants it attracted. They came not only from the breadth and length of the U.S., but from abroad, from France, England, Austria, and Italy.