Gatland picks 10 players from outside Wales for the 37-man extended 6N squad:
Forwards:
Rob Evans (Scarlets), Paul James (Ospreys), Gethin Jenkins (Cardiff Blues), Tomas Francis (Exeter Chiefs), Aaron Jarvis (Ospreys), Samson Lee (Scarlets), Scott Baldwin (Ospreys), Kristian Dacey (Cardiff Blues), Ken Owens (Scarlets), Jake Ball (Scarlets), Luke Charteris (Racing 92), Bradley Davies (Wasps), Dominic Day (Bath Rugby), Alun Wyn Jones (Ospreys), Josh Turnbull (Cardiff Blues), Taulupe Faletau (Newport Gwent Dragons), James King (Ospreys), Dan Lydiate (Ospreys), Ross Moriarty (Gloucester Rugby), Justin Tipuric (Ospreys), Sam Warburton (Capt.) (Cardiff Blues).
Backs:
Aled Davies (Scarlets -- only uncapped player), Gareth Davies (Scarlets), Lloyd Williams (Cardiff Blues) Dan Biggar (Ospreys), Rhys Priestland (Bath Rugby), Cory Allen (Cardiff Blues), Jonathan Davies (Clermont Auvergne), Tyler Morgan (Newport Gwent Dragons), Jamie Roberts (Harlequins), Hallam Amos (Newport Gwent Dragons), Alex Cuthbert (Cardiff Blues), Tom James (Cardiff Blues), George North (Northampton Saints), Gareth Anscombe (Cardiff Blues), Matthew Morgan (Bristol Rugby), Liam Williams (Scarlets).
Players from outside Gatland's Law Wales:
Tomas Francis (Exeter Chiefs)
Luke Charteris (Racing 92)
Bradley Davies (Wasps)
Dominic Day (Bath Rugby)
Ross Moriarty (Gloucester Rugby)
Rhys Priestland (Bath Rugby)
Jonathan Davies (Clermont Auvergne)
Jamie Roberts (Harlequins)
George North (Northampton Saints)
Matthew Morgan (Bristol Rugby)