How many breeds of bulldogs are there?

English Bulldog, American Bulldog, American Pit Bull Terrier, Olde English Bulldogge, French Bulldog, Alapaha Blue Blood Bulldog, Valley Bulldog, American Staffordshire Terrier, Staffordshire Bull Terrier, Bull Terrier, Boston Terrier, bull Mastiff and Banter Bulldogge are the ones I can remember.