WILLIAM & MARY at HARVARD  CORNELL at YALE  COLUMBIA at DARTMOUTH  VILLANOVA at PENN  MAINE at PRINCETON  LAST WEEK  SEASON TO DATE  PERCENTAGE JEFF TOOBIN Sports Editor  Harvard, 27-24  Yale, 20-17  Dartmouth. 34-7  Villanova. 10-3  Maine, 23-10*  4-1  25-12  .676 LARRY GRAFSTEIN Associate Sports Editor  Harvard. 28-14  Yale, 27-24  Dartmouth. 30-16  Villanova. 40-13  Maine, 26-17  4-1  25-12  .676 MICHELLE HEALY Associate Sports Editor  Harvard, 13-10  Yale, 21-17  Dartmouth. 28-3  Villanova, 35-6  Princeton, 19-6  4-1  23-14  .622 NELL SCOVELL Associate Sports Editor  Harvard, 14-10  Yale, 21-10  Dartmouth, 14-7  Villanova, 3-0  Princeton, 46-21  4-1  20-17  .541 BRUCE SCHOENFELD guest selector bookie  Harvard, 21-20  Yale, 14-3  Dartmouth, 24-7  Villanova, 35-14  Maine, 7-6