Marylebone was a parliamentary constituency in Middlesex, England from 1832 to 1885. The parliamentary borough formed part of the built up area of London, and returned two members to the House of Commons of the Parliament of the United Kingdom. The constituency was created under the Reform Act 1832 and divided under the Redistribution of Seats Act, 1885 into eight single member divisions.
The Wikipedia page, with a list, is [1]