The steadily expanding Divinity School registered another major advance yesterday as Dean Horton revealed the permanent acquisition of four key figures "to complete the leadership in content courses."

At the same time Horton released an enrollment figure for next fall 25 students larger than last year's.

The fall total should reach 250. "It will obviously go to 300 soon and perhaps beyond," he said.

James Luther Adams, a leading Unitarian scholar, will become professor of Christian Ethics. Adams is now professor of Religious Ethics in the University of Chicago and Meadville Theological School.

Paul Louis Lehmann, a distinguished Presbyterian theologian, will become Parkman Professor of Theology. He is at present Stephen Colwell Professor of Applied Christianity at Princeton Theological Seminary.

Frank Moore Cross Jr., an authority on the "Dead Sea Scrolls," will be associate professor of Old Testament. Until the summer of 1957, however, he will continue as associate professor of the McCormack Theological Seminary tin Chicago.

Krister Stendahl, Swedish Lutheran scholar, will continue permanently at Harvard as associate professor of New Testament. Stendahl, a leader of church youth work in Europe, has been assistant professor here since 1954.

The appointment of Richard R. Niebuhr, now lecturing on religion at Vassar College, as assistant professor of Theology, was announced earlier.