Dukes and Earls with only daughters?

It very much depends on the letters patent creating the peerage, Earldoms can sometimes p to daughters, e.g. Earl Mountbatten of Burma's title ped to his daughter and she became the 2nd Countess Mountbatten of Burma. However, no existing dukedoms can p to women but can sometimes p to cousins if they are descended through the male line from a previous Duke.