Former Environmental Protection Agency administrator William Ruckelshaus has joined the law firm of Perkins Coie, based in Seattle. "I've talked to a number of law firms since leaving the government," Ruckelshaus said yesterday. "My family and I have decided to return to Seattle and . . . Perkins Coie just seemed to be the best fit" . . .

Maria Schrallhammer, the von Bu low maid, testified yesterday in Providence, R.I., that she found insulin and a syringe in a black bag a month before Martha (Sunny) von Bu low slipped into the second of two comas Claus von Bu low is charged with inducing . . .

Roxanne Pulitzer said yesterday she has dropped her appeal for more alimony from her ex-husband, publishing heir Herbert (Peter) Pulitzer. Her attorneys denied any connection between the dropped appeal and Peter Pulitzer's lawyers' demand the previous day that she reveal how much she was paid to appear nude in the June issue of Playboy magazine. On Thursday, Palm Beach County Judge R. William Rutter had ordered Roxanne Pulitzer to detail her income since the divorce trial, including the amount Playboy paid her . . .

Students from Georgetown University's campus and the Cathedral School were coiffed yesterday as part of Seventeen magazine's back-to-school fashion issue being shot this week. The magazine's production crew will wrap up the spread this weekend at the Cathedral School . . . -- Desson Howe