Retired Marine Corps Brig. Gen. Robert Livingston Denig, 94, who was credited with developing the Marine Corps public relations division that he directed during World War II, died Wednesday at a convalescent hospital in Los Altos, Calif. He had arteriosclerosis.

Gen. Denig also established the Marine Corps combat correspondents unit in which uniformed reporters served overseas and recorded the battle exploits of fellow Marines in World War II. He equipped combat camera-men with color motion picture film to document such historical battles as Iwo Jima in the Pacific.

He remained director of the public relations division at Marine Headquarters here until retiring on Dec. 1, 1945. He then lived in Virginia Beach until moving to Los Altos in 1975.

After the war, Gen. Denig organized the Marine Corps Combat Correspondents Association and was active in it until two years ago.

He was born in Clinton, N.Y., the son of a Navy officer. Part of his boyhood was spent in Japan while his father was on assignment there.

Gen. Denig attended the University of Pennsylvania. In 1905, on his 21st birthday, he was commissioned in the Marine Corps.

During World War I, he was sent to France where he was a battalion commander in both the 2nd and 3rd Infantry Divisions. He participated in offensives at Aisne-Marne, Soissons, St. Mihiel and Meuse-Argonne.

Although wounded, Gen. Denig continued to lead his men in battle. He was awarded the Army Distinguished Service Cross, the Navy Cross and the French Legion of Honor and the Croix de Guerre with Palm.

After the war, he served at several posts in this country, headed antiguerrilla operations in Nicaragua and earned that country's Presidential Medal of Merit.

After further duty at Quantico and Pearl Harbor, Gen. Denig was placed on the retired list in June 1941, while at Marine Barracks at Bremerton, Wash. But he was immediately recalled to active duty to organize the public relations division. For his work as division director, he received the Legion of Merit.

He is survived by a son, retired Marine Corps Brig. Gen. Robert L. Denig Jr., of Los Altos, two grandchildren and five great-grandchildren. CAPTION: Picture, BRIG. GEN. ROBERT L. DENIG 1945 Photo