HER MAJESTY'S NAVAL EXCURSION. -- The Queen, when she goes to sea, from Southampton, will, it is said, cross over to Eu, near Dieppe, so as to visit King Louis Philippe, or let him visit her Majesty on board the yacht.  It is supposed that the French Princes, in their steamer, will accompany the Queen to meet their father.  Lord ABERDEEN will also be of her Majesty's party. -- Morning Post.