Mary Meager set her second world record in nine hours and Kim Lineman narrowly missed setting another world standard tonight, the first night of final competition at the AAU Senior National Long-Course Swimming Championships at the Swimming Hall of Fame Pool.

Meagher, a 5-foot-5, 111-pound high school freshman from Louisville, demolished the world mark in the 200-meter butterfly, recording a 2:07.01 to break the standard of 2:08.41 that she set in the preliminaries. Tracy Caulkins was second in 2:11.97.

Pan American champion Tami Paumier of Columbia Aquatics of Columbia, Md., finished second in the 100-yard breaststroke in 1:12.67.

Linehan, swimming for Longhorn Aquatics of Austin, Tex., set an American mark in the 800-meter free-style in 8:24.71 and just missed the world standard of 8:24.62 held by Tracey Wickham of Australia.

Susan Rapp, 14, swimming in her first national championship, was 13th in the 100-yard breaststroke in 1:14.65. Her sisters Betsy, 19, and Jenny, 16, finished 11th and 15th, respectively, in the 200-meter butterfly. Betsy touched in 2:15.44, and Jenny finished in 2:16.59.