Dr. Lawrence M. Marshall, a professor and former chairman of the biochemistry department at Howard University's College of Medicine, died of cancer Saturday at Howard University Hospital. He was 67.

Born in Pittsburgh, Dr. Marshall received B.S. and M.S. degrees at Duquesne University and later taught at Clark College and at Arkansas A & M. He received a Ph.D. in biochemistry at Wayne State University in Detroit in 1949, and soon after became a teacher at the Howard University College of Medicine, where he rose to professor and then chairman of the biochemistry department.

Dr. Marshall was a member of the American Society of Biological Chemists and the American Chemical Society, and was a fellow of the American Institute of Chemists. He received the Lederle Medical Faculty Award for excellence in research and teaching in 1952, and was visiting professor of biochemistry at the University of California at Berkeley in 1969.

Last June Dr. Marshall was awarded the Distinguished Service Award of Wayne State University's School of Medicine, an annual honor to an outstanding alumnus. His research was primarily in carbohydrate metabolism, and most recently focused on the mechanism of insulin binding of glucose.

Dr. Marshall is survived by his wife, Mary, of the family home in Washington; three children, Lawrence M. Jr., Gwendolyn Whitfield, and Judith, all of Washington; and a brother, James H., of Pittsburg, and three grandchildren.

The family requests that remembrances be in the form of contributions in Dr. Marshall's name to the Seeleley G. Mudd Building Fund, Howard University.