sentences:  Also, however, it is one of eight constituencies in the Mid and West Wales electoral region, which elects four additional members, in addition to nine constituency members, to produce a degree of proportional representation for the region as a whole.The constituency shares the boundaries of the Dwyfor Meirionnydd Westminster constituency, which came into use for the 2010 United Kingdom general election, created by merging into one constituency areas which were previously within the Caernarfon and Meirionnydd Nant Conwy constituencies.Caernarfon was a Gwynedd constituency, entirely within the preserved county of Gwynedd, and one of nine constituencies in the North Wales region.