A dead man with a bag over his head was found floating in the Hudson River near Manhattan’s W. 79th Street Boat Basin early Monday, police said. Police pulled the body from the river near W. 79th St. and Riverside Drive on the Upper West Side after getting a 911 call at 2:20 a.m. Cops were working to identify the man, believed to be between 35 and 40. His death is considered suspicious. The city Medical Examiner will conduct an autopsy to determine how he died.