Mary Meagher set an American record and Cynthis Woodhead won her third event AAU Senior Long Course Swimming Championships tonight at the Swimming Hall of Fame pool.

Meagher and her Lakeside Aquatic Club teammate Lisa Buese finished one-two in the 100-meter butterfly with Meagher breaking the American mark of 1:00.2 set by Joan Pennington of Longhorn Aquatics with a 1:00.19. Buese, 16, was timed in 1:01.01.

Meagher set two world records earlier in the meet in the 200 meter butterfly lowering the mark to 2:07.01. One of 11 children from Louisville, Ky., the 14-year-old led the entire race tonight to complete the butterfly double.

Riverside Aquatic Club's Woodhead, 15, won her third freestyle event, taking the 200-meter version in 1:59.6. Woodhead of Riverside Calif., holds the world record in 1:58.43 and how has won nine national titles in the last two years.

Earlier in the meet Woodhead won the 100-meter, the 400-meter and was second in the 800-meter free style to Kim Linehan, 16, of Longhorn Aquatics.

Tracy Caulkins won the 400-meter individual medley in 4:49.18, well off her world mark of 4:40.83.

Clay Britt of Rockville, Md. was fourth in the 100-meter backstroke but was the second American as two Australians finished second and third. Robert Jackson, the Pan American champion, of Los Gatos, Calif., won the event in 56.75. He was followed by Mark Torelli (57.25), Mark Kerry (56.78) and Britt (57.71).

Britt, representing Starlit Aquatic Club of Fairfax, Va., was offered a spot on the U.S. team going to the FINA World Cup in Tokyo after Jackson turned the trip down. But Britt also refused the offer, saying he wanted to prepare for his freshman year at the University of Texas.

Another Starlit swimmer, Betsy Rapp, accepted a spot on the American team to the World University Games in Mexico City. Rapp, 19, finished 14th in the 100-meter butterfly in [WORD ILLEGIBLE]. Rapp will be sophomore at the University of Florida.

Jenny Rapp, 16, also in the consolation finals of the butterfly, finished in 12th place with a 1:03.09 clocking.