Scotland head coach Gregor Townsend has named a 40-man squad for the 2018 Six Nations.
Uncapped Edinburgh prop Murray McCallum has been included in the squad. The 21-year-old has won a call-up amid a selection crisis in Gregor Townsend's front row which sees Fraser Brown miss out through injury.
Full-back Stuart Hogg is in the squad despite an ongoing hip problem.
Scotland's problems in the front row also see uncapped Glasgow prop D'Arcy Rae included and Jon Welsh and Scott Lawson recalled following several years out of the reckoning.
Full-back Blair Kinghorn and scrum-half Nathan Fowles complete a quartet of uncapped players in Townsend's 40-man pool.
Greig Laidlaw, Richie Gray and Mark Bennett are all included after missing the autumn series through injury.
— Scottish Rugby (@Scotlandteam) January 16, 2018
Scotland Six Nations squad
FORWARDS: John Barclay (CAPTAIN, Scarlets), Simon Berghan (Edinburgh Rugby), Jamie Bhatti (Glasgow Warriors), Magnus Bradbury (Edinburgh Rugby), David Denton (Worcester Warriors), Cornell Du Preez (Edinburgh Rugby), Grant Gilchrist (Edinburgh Rugby), Jonny Gray (Glasgow Warriors), Richie Gray (Toulouse), Luke Hamilton (Leicester Tigers), Rob Harley (Glasgow Warriors), Scott Lawson (Newcastle Falcons), Murray McCallum (Edinburgh Rugby)*, Stuart McInally (Edinburgh Rugby), Gordon Reid (London Irish), D’arcy Rae (Glasgow Warriors)*, Ben Toolis (Edinburgh Rugby), George Turner (Glasgow Warriors), Hamish Watson (Edinburgh Rugby), Jon Welsh (Newcastle Falcons), Ryan Wilson (Glasgow Warriors)
BACKS: Mark Bennett (Edinburgh Rugby), Alex Dunbar (Glasgow Warriors), Nick Grigg (Glasgow Warriors), Chris Harris (Newcastle Falcons), Stuart Hogg (Glasgow Warriors), Pete Horne (Glasgow Warriors), Ruaridh Jackson (Glasgow Warriors), Huw Jones (Glasgow Warriors), Lee Jones (Glasgow Warriors), Blair Kinghorn (Edinburgh Rugby)*, Greig Laidlaw (ASM Clermont Auvergne), Sean Maitland (Saracens), Byron McGuigan (Sale Sharks), Ali Price (Glasgow Warriors), Henry Pyrgos (Glasgow Warriors), Finn Russell (Glasgow Warriors), Tommy Seymour (Glasgow Warriors), Duncan Taylor (Saracens), Nathan Fowles (Edinburgh Rugby)*
* Denotes uncapped player