Thb Nbw Stbabbb Sabatooa.— The new steamship Saratoga, of the New York and Vir ginia Steamship Company, made a trial trip down the bay, from New York, and one to the buoy on the bar, on Saturday, making a speed of about fourteen and a half miles per hour. This vessel is a sister ship to the Nia gara, and is of the following dimensions: Length, two hundred and thirty feet; beam,