Lance Primis resigned suddenly as president and chief operating officer of The New York Times Co. Sept. 20. The move comes months after a report surfaced of a rivalry between Mr. Primis, Times Publisher Arthur O. Sulzberger Jr. and family members over who will succeed Arthur Sulzberger Sr., 70, as chairman-CEO. Russell T. Lewis, 49, was named to succeed Mr. Primis, from president and general manager of the Times' flagship newspaper. Janet L. Robinson, 46, senior VP-advertising at the Times, was named president-general manager, succeeding Mr. Lewis. She is succeeded by Daniel Cohen, 44, who was VP-ad sales.