Adam McBurney is the latest name to be added to the touring party, with the Ulster hooker replacing the injured Dave Cherry. McBurney, a former Ireland under-20 international, will join Edinburgh over the summer.
The tour is an opportunity for some of the nation’s most talented youngsters to get experience of international rugby but there are also some left-field call-ups for the matches against England A on June 27, Romania on July 7 and Georgia on July 14.
With Gregor Townsend away on the Lions tour, Mike Blair will take charge of Scotland as interim head coach.
Here are the 18 new faces in the squad:
17. Sione Tuipulotu (centre/wing)
Sione Tuipulotu, pictured left in action for Yamaha Jubilo against Toyota Verblitz in the Japanese Top League, is 24 and qualifies for Scotland through his Glaswegian grandmother. The Aussie-born back will join Glasgow Warriors in the summer. He played previously for Melbourne Rebels in Super Rugby before moving to Japan. Photo: Kaz Photography/Getty Images
18. Adam McBurney (hooker)
Ballymena-born Adam McBurney represented Ireland up until under-20 level but qualifies for Scotland through his grandmother from Cadder, Lanarkshire. The Ulster hooker has agreed a move to Edinburgh for next season. Photo: Matthew Lewis/Getty Images