Regeneration, Development and Genotype.

Regeneration, Development and Genotype: PROFESSOR CHARLES E. ALLEN ........... ................................ 365 The University and the Present Crisis: PROFESSoR A.J. CARLSON ........................................... 369 The University and the War: PRESIDENT ARTHUR CUTTS WILLARD ......... .................................. 372 Obituary: Robert William, Hegner: DR. W. W. CORT. W. L. Scoville: DR. P. A. Fooms. Recent Deaths .................. 373 Scientific Events: The Institute of Food Technology; The Association of College Geology Teachers; The Nineteenth Colloid Symposium; Pacific Division of the American Association for the Advancement of Science; The American Philosophical Society .................................... 375 Scientific Notes and News .................... ....................... 377 Discussion: The Earliest Account of the Association of Human Artifacts with Fossil Mammals in North America: PROFESSOR M. F. ASHLEY MONTAGU. Return of a Marked Salmon from a Distant Place: Da. A. G. HUNTSMAN. Hatching of the Blue Crab, Callinectes Sapidus Bathbun: DR. MARGARET S. LocHHEAD, DR. JOHN H. LOCHHEAD and PRoFEssoR CURTIS L. NEWCOMBE. The Period of Gonadal Activity in the Maryland Muskrat: DR. THOMAS R. FORBES. "Audience Enemies": DR. JOHN B. LuCKE, DR. GILBERT DALLDORF and DR. JEAN BROADHUERST ........................................... 380 Quotations: "To Do Something for the Welfare of Mankind" ... 384 Scientific Books: Radiation Therapy: PROFESSOR FRANcIs C. WOOD. Modern Algebra: PROFESSOR MORGAN WARD ............ 384