Conference strugglers Dartford have signed Plymouth Argyle defender Jamie Richards on a one-month loan deal.
The 20-year-old spent the first half of the season on loan at League of Ireland side Linfield.
Richards came through Plymouth's youth system and has made a total of three appearances for the League Two club.
He is eligible to make his debut for the Darts, who are 22nd in the table and eight points from safety, against Bristol Rovers on Saturday.
Meanwhile centre-back Mat Mitchel-King has left Princes Park by mutual consent because of work commitments.