What is "dartmouth"

Dartmouth, also at some times called Clifton, Dartmouth and Hardness, was a parliamentary borough in Devon which elected two Members of Parliament (MPs) to the House of Commons in 1298 and to the Commons of England, Great Britain, and the United Kingdom from 1351 until 1832, and then one member from 1832 until 1868, when the borough was disfranchised.