The Navy relieved a two-star admiral of his duties Friday, and the Pentagon announced that the Army's top civilian lawyer is under investigation, both for alleged sexual harassment.

In the latest installment in a string of sexual misbehavior cases wracking the military, the Navy said it was temporarily relieving Rear Adm. R.M. Mitchell Jr. as commander of the Naval Supply Systems Com-mand at Mechanicsburg, Pa., due to allegations of "conduct unbecoming an officer."The Pentagon also announced that William T. Coleman III, the Department of the Army's civilian counsel, is being investigated for sexual harassment. He is the son of the transportation secretary during President Ford's administration.

Speaking on the condition of anonymity, sources said the investigations of both men originated from calls to anonymous sexual abuse hotlines set up last fall in the wake of charges that drill sergeants at the Army's Aberdeen Proving Ground in Maryland were coercing sex from female recruits.